Environmental Product Declarations (EPDs) are becoming essential for AEC professionals aiming to reduce embodied carbon and make smarter, data-driven material choices

Would you buy food without reading the label? Probably not. Nutrition facts help consumers make informed choices about calories, ingredients and serving sizes. They give people a basic level of transparency about what they’re putting into their bodies.

That same level of transparency is now making its way into construction. Environmental Product Declarations (EPDs) function like nutrition labels for building products. They provide standardized information about a product’s environmental footprint, giving architects, engineers and contractors critical data to evaluate sustainability during the design and build phases.

As the construction industry confronts growing demands to reduce embodied carbon and operate more responsibly, EPDs are becoming essential tools. But what exactly are they, how do they work and why should the AEC community care?

Defining the EPD

EPDs are third-party verified documents that summarize a product’s environmental impact, based on a comprehensive lifecycle assessment (LCA). Originally developed in Sweden in the 1990s, EPDs have grown in global relevance as sustainability standards and green building certifications have expanded.

EPDs aim to provide clarity about a material’s carbon footprint and other environmental effects across its entire lifecycle—from raw material extraction to manufacturing, use and eventual disposal.

“EPDs allow design teams to make informed choices about materials and their impacts on the planet,” said Jon Penndorf, studio director of regenerative design at Perkins & Will. “The increased transparency is something we can share with end-user and owner clients to help them develop their facility’s story.”

This story isn’t just about environmental stewardship. In many cases, it’s also a way to meet specific performance targets, adhere to sustainability frameworks like LEED and BREEAM and differentiate a project in a competitive marketplace.

Not All EPDs Are Created Equal

While EPDs offer valuable data about a product’s environmental profile, it’s important to remember that the presence of an EPD doesn’t automatically mean a product is better for the planet.

“Just because a product has an EPD doesn’t mean it’s environmentally superior to alternatives from a climate perspective,” Penndorf said.

An EPD simply signals that the manufacturer has gone through the process of measuring and disclosing environmental data. That transparency is valuable—but not a guarantee of low impact. Evaluating whether a product is truly a better option still requires context, comparison and often additional certifications or data sources.

“Having an EPD, especially when combined with other transparency data such as Health Product Declarations and third-party materiality certifications, including Greenguard and Cradle to Cradle, provides a holistic understanding of a product’s impacts,” Penndorf added.

The Purpose Behind EPDs

EPDs play a growing role in sustainability strategies, particularly as the construction sector seeks to reduce its contribution to climate change. Building materials and processes account for a significant portion of global carbon emissions. Choosing products with lower embodied carbon can significantly reduce a project’s environmental impact.

“EPDs can also demonstrate how manufacturers are making strides to reduce embodied carbon of their goods, which can help push the market toward a lower carbon impact,” Penndorf said.

What Makes an EPD Credible?

To be trusted and useful in real-world projects, an EPD must meet specific credibility standards:

  • Compliance with ISO standards: EPDs must follow standardized international procedures for lifecycle assessments.
  • Adherence to product category rules (PCRs): These define how LCAs are conducted for different types of products and ensure consistency within categories.
  • Third-party certification: This adds an extra layer of impartiality and credibility.
  • Functional unit definition: EPDs should clearly indicate the measurement basis, such as “per square foot” or “per kilogram.”
  • Defined lifecycle stages: The document should identify the scope of the analysis, whether it includes only production (cradle to gate), full usage (cradle to site) or complete lifecycle impacts (cradle to grave).

“All of these characteristics are essential to understand what has been evaluated, so we can accurately use that data to tally the impact of a material based on the amount in a design,” Penndorf said.

These lifecycle stages help project teams understand what’s covered in the analysis and how it aligns with the broader environmental goals of the project. For instance, if a project prioritizes end-of-life recyclability or maintenance costs, an EPD limited to cradle-to-gate analysis may not be sufficient.

Making the Most of an EPD

While EPDs provide valuable data, using them effectively requires a degree of diligence. The first step is verifying the document’s authenticity and scope. Check whether it has been reviewed by an accredited third party and whether it remains valid—EPDs typically have a five-year shelf life.

It’s also important to examine the details of how the EPD was developed. Not all EPDs are generated using the same assumptions, methodologies or functional units, which can make direct comparisons difficult.

“Comparing EPDs that were created using different methodologies, LCAs or PCRs is challenging,” Penndorf noted. “A valid comparison needs a clear picture of the circumstances under which a product or material will be used.”

In other words, don’t assume that a lower carbon number in one EPD means it’s the better product. Different inputs may skew the comparison. Even product variants can affect performance.

“For example, an EPD may document the impacts of batt insulation,” Penndorf said. “But that same batt insulation may come in different thicknesses or include a paper or foil backing. Each variable must be accounted for to confirm that the specified product and impacts align.”

EPDs, Clients and Code Compliance

Many architects and contractors are now expected to account for environmental performance in client proposals. Whether or not a client demands EPDs specifically, including them in the specification process can serve as evidence of thoughtful design, compliance with ESG frameworks and support for green certifications.

Even so, not every building product comes with an EPD. In fact, many manufacturers don’t publish them at all—sometimes due to proprietary ingredients, complex product composition or lack of internal expertise in lifecycle assessments.

“This could be because their products are complex, with many materials and parts,” Penndorf said. “Or the manufacturer may feel the product is proprietary and therefore doesn’t want to release ingredient information.”

For project teams aiming to complete full-building lifecycle assessments or reduce overall embodied carbon, the absence of EPDs can be a challenge. In these cases, design professionals may prioritize manufacturers who do publish EPDs, both to simplify specification and support broader sustainability goals.

Moreover, regulations are increasingly shifting toward transparency. In several jurisdictions, building codes now include mandates around energy efficiency and environmental disclosure. EPDs can help meet these regulatory benchmarks—and ensure future readiness as standards continue to evolve.

“In addition, many countries and regions now require new buildings to achieve specified levels of energy efficiency or to use environmentally friendly materials,” Penndorf said. “As building codes and regulations become more stringent, the use of EPDs will likely grow.”

Building a Transparent Future

The AEC industry is under pressure—from regulators, clients and the environment itself—to make more responsible choices about materials and methods. EPDs offer a clear path forward.

While not every project will require them today, EPDs are quickly becoming a baseline expectation for sustainable design. They equip professionals with the information needed to reduce carbon emissions, choose responsibly and demonstrate environmental performance.

EPDs aren’t a silver bullet. But they are a crucial part of the toolkit for anyone committed to building smarter, cleaner and more consciously.

Whether you’re working on a new build, a retrofit or a tenant improvement, now is the time to start reading the label.

Ready to build smarter and more sustainably?

The stadiums that host the best in English football showcase a blend of historic architecture, modern engineering and unique fan experiences, defining their lasting architectural significance

In the Premier League, the action on the pitch is only part of the story. Towering stands, sweeping roofs and dazzling video boards form the architectural stage where sports history is made.

Each Premier League stadium tells a story of ambition, design ingenuity and community identity. From 19th-century grounds to futuristic arenas, the league’s iconic venues are more than sports arenas; they’re cultural landmarks and feats of construction excellence.

Join Built on a design-focused tour of some of the most famous Premier League stadiums, highlighting what makes them construction marvels and architectural icons.

The Historic Icons: Where Tradition Meets Timeless Design

Old Trafford (Manchester United)

Opened: 1910 | Capacity: 74,310

Known globally as the “Theatre of Dreams,” Old Trafford is a masterclass in football architecture. Its cantilevered stands, built in the 1960s, were a game-changer, offering uninterrupted views that revolutionized stadium design. Despite numerous expansions, including the towering Sir Alex Ferguson Stand, Old Trafford maintains its historical charm while meeting modern safety and comfort standards. Its ongoing renovation plans aim to blend history with high-tech upgrades, including potential rail seating for safe standing.

Key Architectural Insight: Expansions have preserved Old Trafford’s original core, requiring precise integration of new structures into an active stadium—a construction challenge tackled through phased developments.

Anfield (Liverpool FC)

Opened: 1884 | Capacity: 53,394 (expanding to 61,000 by 2026)

Few venues in world football evoke as much passion as Anfield. The iconic Kop Stand, a single-tier terrace holding nearly 13,000 fans, creates an unrivaled matchday atmosphere. Recent expansions added the towering Main Stand and upcoming Anfield Road Stand redevelopment, requiring delicate construction while preserving the site’s historical identity.

Key Architectural Insight: Anfield’s expansions faced a unique constraint—its location in a dense residential area. Designers created a vertical extension to build upward rather than outward, using cantilevered engineering to avoid impacting the surrounding community.

Stamford Bridge (Chelsea FC)

Opened: 1877 | Capacity: 40,343

Stamford Bridge stands as a mix of old and new. Originally built as an athletics ground, it became Chelsea FC’s home in 1905. Its iconic East Stand, built in the 1970s, still defines its skyline. While major redevelopment plans are in the works, integrating modern luxury while respecting the club’s heritage remains a core design challenge.

Key Architectural Insight: Transforming a multi-sport venue into a football-specific stadium required significant redesigns, including underground construction to expand concourse spaces and hospitality areas.

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The Evolution of Premier League Stadiums: Key Milestones

Premier League stadiums have undergone remarkable transformations, blending history, innovation and fan-focused design. Here’s a timeline of pivotal moments that reshaped the stadium landscape in English football:

• 1992: The Launch of the Premier League

The creation of the Premier League introduced stricter safety and capacity regulations, sparking widespread stadium upgrades. Traditional grounds like Anfield (Liverpool), Old Trafford (Manchester United) and Villa Park (Aston Villa) were expanded to meet modern standards while retaining their historical essence. The era also saw the rise of all-seater stadiums to enhance safety and fan experience.

• 1995: St. James’ Park Expansion

Newcastle United’s St. James’ Park expanded its capacity with towering stands that transformed the stadium into one of England’s most imposing football arenas. Its integration into the city’s skyline became a defining architectural feature, blending football heritage with urban identity.

• 1997: Rebuilding of Pride Park Stadium

Derby County moved into Pride Park, one of the first new-build stadiums inspired by continental designs. Its modern bowl-like structure set a new benchmark for mid-tier clubs aiming for top-flight readiness.

• 2003: Etihad Stadium Becomes Manchester City’s Home

After hosting the 2002 Commonwealth Games, Manchester City converted Etihad Stadium into its home ground. The multi-phase construction involved lowering the field and expanding seating, making it a Premier League-ready venue with a distinctive, asymmetrical roof design.

• 2006: Emirates Stadium Opens

Arsenal’s relocation from Highbury to Emirates Stadium marked a new era of Premier League infrastructure. The 60,704-seat stadium featured a sleek, modern design, emphasizing fan comfort, corporate hospitality and architectural innovation. It remains one of Europe’s most visually striking football arenas.

• 2009: New Wembley Stadium Debuts

While technically not a Premier League stadium, the completion of Wembley Stadium in 2009 symbolized a new era for English football. Its iconic arch became a defining feature of the London skyline, and its cutting-edge design influenced future Premier League stadium projects.

• 2010: Amex Stadium Opens

Brighton & Hove Albion moved into the Amex Stadium after years of playing at temporary grounds. Its eco-friendly design and fan-focused infrastructure showcased how smaller clubs could achieve Premier League standards through thoughtful design and sustainable construction.

• 2013: Anfield Expansion Begins

Liverpool’s phased expansion of Anfield preserved the stadium’s historical core while increasing its capacity to more than 54,000, with a new 61,000-seat target set for 2026. The project demonstrated how modern construction could coexist with football heritage, maintaining the electric atmosphere of the famous Kop Stand.

• 2016: Olympic Stadium Becomes West Ham United’s Home

West Ham United’s move to London Stadium (formerly the 2012 Olympic Stadium) presented unique architectural challenges. Its transformation from an athletics venue into a football stadium required an overhaul of the lower seating tiers and a retractable seating system to improve fan proximity.

• 2017: New White Hart Lane Demolition

Tottenham Hotspur took the bold step of demolishing its beloved White Hart Lane to build the ultra-modern Tottenham Hotspur Stadium. The new venue, completed in 2019, set industry standards with its retractable football/NFL pitch, multi-use design and cutting-edge technology.

• 2019: Tottenham Hotspur Stadium Opens

Tottenham’s new home was unveiled, featuring a 62,850-seat capacity, one of Europe’s largest single-tier stands, and a fully retractable pitch for NFL games. It remains a model of multi-sport versatility, attracting events far beyond football, from concerts to esports tournaments.

Looking Ahead

  • Anfield Road Expansion (2026): Increasing Liverpool’s capacity to 61,000.
  • Stamford Bridge Redevelopment (TBD): Chelsea FC is planning a complete rebuild.
  • New Old Trafford Vision (TBD): Manchester United is considering a major redevelopment of its legendary stadium.

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The Futuristic Arenas: Tomorrow’s Stadiums, Built Today

Tottenham Hotspur Stadium

Opened: 2019 | Capacity: 62,850

Arguably the most advanced stadium in the world, Tottenham Hotspur Stadium set new benchmarks in design and functionality. Its standout feature is its retractable pitch, enabling seamless transitions from football to NFL games. The stadium’s multi-use capacity extends to concerts and even esports, redefining versatility.

Key Architectural Insight: Installing a 10,000-ton retractable pitch required precision engineering and custom-designed hydraulic systems. The project team also worked under an aggressive timeline to complete the stadium in time for Spurs’ Premier League season.

Emirates Stadium (Arsenal FC)

Opened: 2006 | Capacity: 60,704

Emirates Stadium represented a seismic shift for Arsenal, moving from the historic Highbury ground to a modern, world-class facility. Its unique oval-shaped roof and curved exterior ensure maximum natural light while reducing wind impact on the pitch.

Key Architectural Insight: The construction site was a former industrial estate, requiring significant environmental remediation, including the removal of more than 200,000 tons of contaminated soil. Its eco-conscious design includes solar panels and a rainwater recycling system.

Etihad Stadium (Manchester City)

Opened: 2003 | Capacity: 53,400 (expanding to 60,000)

Originally built for the 2002 Commonwealth Games, Etihad Stadium was converted into Manchester City’s home through an engineering marvel: lowering the playing surface by several meters to create additional spectator capacity. Its asymmetrical roof creates a unique silhouette, making it one of the most recognizable stadiums in football.

Key Architectural Insight: The stadium’s post-Games conversion required retrofitting stands, lowering the field and maintaining structural stability—an engineering feat executed without displacing nearby infrastructure.

Hidden Architectural Gems

St. James’ Park (Newcastle United)

Opened: 1892 | Capacity: 52,305

Perched atop a hill in central Newcastle, St. James’ Park dominates the city skyline. Its asymmetrical design resulted from limited expansion options, leading to the creation of the towering Milburn and Leazes Stands. Its architectural eccentricities have become part of its charm.

Key Architectural Insight: Building into Newcastle’s hilly terrain required complex geotechnical engineering, resulting in one of the most distinctive stadium profiles in sports.

Craven Cottage (Fulham FC)

Opened: 1896 | Capacity: 25,700 (expanding to 29,600)

Nestled along the River Thames, Craven Cottage is unlike any modern stadium. Its historic cottage-style pavilion remains intact, blending Edwardian charm with modern upgrades. Ongoing expansions have added a riverside stand with a rooftop terrace while preserving its old-world character.

Key Architectural Insight: Limited space required creative use of waterfront land, involving structural support pilings driven into the riverbed.

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Notable Architectural Firms Behind Premier League Stadiums

The design excellence of Premier League stadiums is backed by some of the world’s leading architectural firms:

  • Populous: The firm behind the ultra-modern Tottenham Hotspur Stadium, known for its retractable pitch, single-tier South Stand and multi-sport versatility.
  • Foster + Partners: Renowned for designing Wembley Stadium, with its iconic arch. Their influence extended to Emirates Stadium, giving Arsenal a modern football cathedral.
  • KSS Group: Responsible for Anfield’s Main Stand expansion, blending Liverpool FC’s storied heritage with cutting-edge design, increasing capacity while preserving the stadium’s legendary atmosphere.

These firms have set global standards by transforming sports architecture into world-class fan experiences.

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Villa Park (Aston Villa)

Opened: 1897 | Capacity: 42,749

Villa Park’s mix of Edwardian architecture and modern grandstands creates a timeless football environment. Its planned North Stand redevelopment will add thousands of new seats while maintaining its unique architectural style.

Key Architectural Insight: Being a listed heritage site means all renovations must comply with strict preservation rules, balancing old-world charm with modern standards.

Stadiums as Cultural Landmarks: Blending Architecture, History and Community Impact

Premier League stadiums are more than sports venues. They’re architectural statements blending history, design and cutting-edge construction.

From Old Trafford’s timeless majesty to Tottenham Hotspur Stadium’s futuristic brilliance, each ground reflects its club’s identity while embracing modern engineering advancements.

For design and construction professionals, these stadiums offer rich case studies in balancing heritage, innovation and fan engagement. They remind us that great stadiums aren’t just built—they’re crafted through vision, precision and passion.

Build smarter. Design better.

Baseball’s most historic stadiums blend iconic designs, rich histories and enduring traditions that continue to captivate fans and architecture enthusiasts alike

There’s something magical about walking into a baseball stadium that has stood the test of time.

The crack of the bat, the smell of hot dogs on the grill and the hum of a hopeful crowd echoing through weathered steel beams. For architecture enthusiasts and sports fans alike, Major League Baseball’s most historic stadiums are living monuments to design, engineering and tradition.

These ballparks are more than just venues—they’re cathedrals of the game, carefully preserved and updated to keep their stories alive.

Join Built on a tour of MLB’s most iconic stadiums, where architectural history meets baseball heritage.

Where Design Meets Legacy: The Power of Stadium Preservation

Baseball stadiums aren’t just backdrops for America’s pastime; they’re symbols of resilience and craftsmanship. Each park tells its own story through its design: grand arches, hand-operated scoreboards, ivy-covered walls and panoramic skyline views. As construction and preservation professionals know, keeping a stadium relevant while maintaining its historic character is a feat of engineering and vision.

In an age of sleek modern arenas, these ballparks stand as reminders of how smart design and adaptive reuse can make history last. MLB franchises have spent millions restoring and modernizing their iconic homes while staying true to the spirit of the game.

The Classics: Baseball’s Timeless Cathedrals

Fenway Park (Boston Red Sox)
Year Opened: 1912 | Architect: James E. McLaughlin

The oldest stadium still in use, Fenway Park has witnessed more than a century of baseball history. Its iconic features, including the towering Green Monster and manually operated scoreboard, have made it a fan favorite and architectural marvel.

Renovation efforts since 2002 have modernized Fenway while preserving its quirks. New seating atop the Green Monster, expanded concourses and restored facade details have ensured its longevity. The Boston Globe reported that even after more than 110 years, Fenway continues to adapt while keeping its nostalgic soul intact.

Wrigley Field (Chicago Cubs)
Year Opened: 1914 | Architect: Zachary Taylor Davis

Few stadiums have a more recognizable facade than Wrigley Field, with its ivy-covered outfield walls and signature red marquee. Its hand-turned scoreboard still operates the same way it did more than a century ago.

The $575 million “1060 Project” wrapped up in 2019, ensuring Wrigley could serve future generations while retaining its historic essence. As detailed by the Chicago Tribune, the renovations included expanded clubhouses, new seating decks and updated concourses—all done with a reverence for its original charm.

Mid-Century Marvels: Where Design Meets the Golden Era

Dodger Stadium (Los Angeles Dodgers)
Year Opened: 1962 | Architect: Emil Praeger

Dodger Stadium’s mid-century modern design is as timeless as a Sandy Koufax fastball. Perched in Chavez Ravine with the San Gabriel Mountains as its backdrop, it’s the largest MLB stadium by capacity yet still feels intimate.

A $100 million renovation completed in 2020 added a new center-field plaza, upgraded pavilions and improved fan amenities—all while preserving the park’s unmistakable look.

Angel Stadium (Los Angeles Angels)
Year Opened: 1966 | Architect: Noble W. Herzberg

Angel Stadium’s “Big A” scoreboard has become a regional icon. Its clean mid-century lines and open design have allowed it to age gracefully through several renovations, including a major overhaul in the 1990s that modernized seating and added premium spaces.

Though ownership has floated the idea of a new stadium, preservationists argue that Angel Stadium’s history is worth saving.

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Unique Architectural Easter Eggs in MLB’s Historic Ballparks

Baseball’s most legendary stadiums aren’t just places to catch a game—they’re living museums filled with hidden gems and design secrets. From quirky architectural features to subtle tributes embedded in their structures, these ballparks hold stories waiting to be discovered. Here’s what to keep an eye out for the next time you find yourself under the lights:

1. Fenway Park (Boston Red Sox): The Lone Red Seat

Section 42, Row 37, Seat 21 in Fenway Park’s right-field bleachers stands out for its distinctive red color among a sea of green. It marks the spot where Ted Williams hit the longest home run in Fenway’s history—502 feet—on June 9, 1946. This unassuming seat has become a photo op for baseball pilgrims.

2. Wrigley Field (Chicago Cubs): The Mysterious Ivy Door

The ivy-covered outfield walls of Wrigley Field hide a small, almost invisible door in the center-field wall. Groundskeepers use it for maintenance, but its placement has sparked myths and fan speculation for decades. Some say it leads to a secret tunnel, but in reality, it’s just a practical entryway for upkeep.

3. Dodger Stadium (Los Angeles Dodgers): Secret Vin Scully Tribute

Though not publicized, several small plaques around Dodger Stadium quietly honor legendary broadcaster Vin Scully. Look closely near the press box and in the broadcasters’ concourse to find subtle tributes to the voice of the Dodgers.

4. Oriole Park at Camden Yards (Baltimore Orioles): Warehouse Signatures

Behind the right-field wall sits a historic warehouse that’s become a signature part of Camden Yards’ design. Its brick facade features autographs from Hall of Fame players and dignitaries who’ve visited the park over the years—an ever-growing timeline of baseball legends.

5. PNC Park (Pittsburgh Pirates): Bridge Homage

PNC Park’s outfield offers stunning views of Pittsburgh’s iconic Roberto Clemente Bridge. What many fans miss is how the stadium itself reflects the city’s industrial past. The park’s exposed steel beams were painted the same yellow as the bridge, connecting the stadium to its urban surroundings.

6. Kauffman Stadium (Kansas City Royals): Crown Jewel

Most fans know about Kauffman Stadium’s signature outfield fountains, but few notice the intricate crown detail atop the scoreboard. The design reflects Kansas City’s nickname as the “City of Fountains” while giving a regal nod to the Royals’ team name.

These hidden gems give each stadium its own unique identity, blending baseball tradition with clever architectural design. Next time you’re in the stands, keep your eyes peeled—you might just spot a piece of baseball history hiding in plain sight.

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Modern Classics with Historic Flair

Oriole Park at Camden Yards (Baltimore Orioles)
Year Opened: 1992 | Architect: HOK Sport (now Populous)

Camden Yards changed stadium design forever by combining modern amenities with a nostalgic look. The warehouse beyond right field is just as iconic as any baseball feature.

As Sports Illustrated noted, Camden Yards sparked a retro ballpark revolution, inspiring designs for PNC Park and others. Recent renovations include expanded outfield decks and upgraded accessibility while retaining its old-school vibe.

Busch Stadium (St. Louis Cardinals)
Year Opened: 2006 | Architect: Populous

Though newer than other parks on this list, Busch Stadium draws from St. Louis’s deep baseball roots. Its brick facade and views of the Gateway Arch make it a modern homage to past Cardinals ballparks.

Recent expansions to the adjacent Ballpark Village have made Busch a year-round destination while keeping its design rooted in St. Louis’s history.

PNC Park (Pittsburgh Pirates)
Year Opened: 2001 | Architect: HOK Sport (now Populous)

Considered one of the most beautiful stadiums in sports, PNC Park is a masterclass in contextual design. Its downtown Pittsburgh views and classic facade blend seamlessly with the city’s industrial heritage.

Frequent maintenance and tech updates have kept PNC among baseball’s best, proving that good design stands the test of time.

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Balancing Modern Upgrades with Historic Integrity

Updating MLB’s historic stadiums isn’t as simple as adding new seats or high-tech scoreboards. Architects face the delicate task of modernizing facilities while preserving iconic features that define each park’s character.

At Wrigley Field, for example, adding luxury suites meant carefully reconfiguring the grandstands while keeping the ivy-covered walls and hand-operated scoreboard intact. Similarly, Fenway Park’s renovations required blending modern amenities with its century-old architecture.

Every upgrade must honor the past while ensuring these baseball cathedrals remain game-ready for future generations.

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Kauffman Stadium (Kansas City Royals)
Year Opened: 1973 | Architect: Kivett & Myers

With its signature fountains and curved design, Kauffman Stadium still feels futuristic decades after its debut. Major upgrades in 2009 included a new scoreboard and expanded fan areas, preserving its unique aesthetic.

Preserving Baseball’s Historic Stadiums While Building for the Future

Preserving these architectural icons is a complex endeavor that requires deep expertise in construction, engineering and design. While materials and technologies have changed, the principles of thoughtful renovation remain the same: Honor the past while making space for the future.

The next time you visit one of these storied ballparks, look beyond the diamond. See the architecture, preservation work and craftsmanship that keep these stadiums alive long after the final out is called.

Love stadium design? Build your legacy with tools that bring iconic projects to life.

Facing land shortages and rising seas, architects are embracing floating structures as a groundbreaking solution for sustainable urban growth

As cities become denser and waterfront property grows more valuable, finding new land for development is increasingly difficult. Traditional construction methods struggle to adapt to rising sea levels and the unique challenges of coastal urbanization.

Koen Olthuis, founder of Dutch architecture firm Waterstudio, has spent years tackling this problem from a different angle: building on water. His innovative approach, as profiled in The New Yorker, is transforming floating architecture from a niche concept into a practical solution for climate resilience and sustainable urban expansion.

“Waterstudio was founded with the vision of providing innovative and sustainable solutions for the challenges of rising sea levels and climate change,” Olthuis shared in an interview with Bluebeam. “Our floating architecture stems from a passion for designing buildings that adapt to water instead of fighting against it.”

The Rise of Floating Architecture: From Necessity to Opportunity

Many countries have long histories of water-based communities, from the stilted villages of Southeast Asia to the floating markets of Amsterdam and Bangkok. But today, floating architecture is evolving beyond tradition into a modern necessity.

Olthuis believes that shifting mindsets is key to unlocking its potential.

“We saw an opportunity not only to design homes, but entire communities that could safely and sustainably exist on water,” he said. “That’s how we started focusing on floating homes, commercial buildings and even cities on water.”

Floating architecture isn’t just a response to rising sea levels. It also addresses land shortages, urban density and the need for sustainable development. By building on water, cities can expand without consuming more land or disrupting existing ecosystems.

Engineering for Water: How Floating Structures Stay Stable

Unlike traditional buildings, floating structures must account for constant movement, changing water levels and environmental forces such as wind and waves. This requires an entirely different engineering approach.

“In floating structures, the focus is on stability, durability and flexibility,” Olthuis explained. “We must consider the movement of the water, wave impact and possible variations in water levels.”

To achieve this, architects and engineers use high-density concrete platforms, advanced mooring systems and prefabricated modular construction techniques. Some key considerations include:

  • Hydrodynamics: Structures must be designed to remain stable in fluctuating water conditions.
  • Material Durability: Corrosion-resistant materials, such as stainless steel, treated wood and reinforced concrete, are essential.
  • Energy and Utilities: Floating buildings often integrate self-sustaining systems for water filtration, energy production and waste management.
  • Regulatory and Legal Considerations: Many jurisdictions lack clear building codes for floating structures, requiring close coordination with urban planners and policymakers.

“A major difference is the dynamics of water,” Olthuis said. “The structure must withstand varying water levels, currents and wind. Additionally, we deal with regulations that differ from those on land, such as permits and property rights over water.”

Designing for Sustainability: Why Floating Cities Could Be the Future

As floating architecture gains momentum, many projects now prioritize sustainability, using solar power, rainwater harvesting and energy-efficient designs to create self-sustaining water-based communities.

Some of the most ambitious floating projects include:

  • The Maldives Floating City: A climate-resilient urban hub designed to accommodate rising sea levels.
  • BlueTech Park (Netherlands): A mixed-use floating development featuring housing, offices and green spaces.
  • Oceanix Busan (South Korea): A prototype floating city in partnership with the United Nations, designed to support climate refugees.

For Olthuis, the integration of sustainable technologies is a priority.

“We choose materials that withstand a humid and salty environment, such as stainless steel, high-density concrete and special coatings,” he explained. “These materials need to be more durable in harsh conditions, so sustainability is an absolute priority.”

Key Challenges in Floating Construction—And How to Overcome Them

Despite its benefits, floating architecture presents unique logistical and technical challenges that require digital collaboration and real-time engineering coordination. Some key hurdles include:

  • Structural Integrity: Ensuring buildings can withstand water movement, wave pressure and extreme weather.
  • Infrastructure Connectivity: Developing efficient solutions for water supply, sewage and energy without relying on land-based infrastructure.
  • Material Transport and Construction: Floating buildings are often assembled in specialized shipyards and transported to their final location, requiring careful project coordination.
  • Regulatory Hurdles: Many cities still lack clear zoning laws for floating structures, requiring custom permitting and compliance strategies.

Olthuis and his team tackle these challenges with multidisciplinary collaboration between architects, marine engineers and hydrologists.

“A typical project begins with a feasibility study where we consider the location, water depth, wave activity and climate,” he said. “Then, we design a concept that aligns with the client’s vision and work with engineers to develop a stable, safe and sustainable solution.”

Even after construction, ongoing maintenance is crucial.

“Water-based structures require regular maintenance to prevent corrosion and wear, especially with anchors and fastenings,” Olthuis added. “I advise clients to invest in periodic inspections and to choose high-quality materials to extend the lifespan.”

Looking Ahead: The Future of Floating Architecture in Global Development

With urban land becoming scarcer and climate challenges intensifying, floating architecture is no longer just a niche concept; it’s an essential strategy for sustainable development.

Olthuis believes the field will continue to evolve, with more large-scale floating projects on the horizon.

“A challenging project was the development of a floating city in a lagoon,” he shared. “The unpredictable currents and wave action required an entirely new foundation design and innovative wave breakers. We worked closely with hydrologists and marine engineers to develop a stable and safe structure.”

For architects, engineers and developers interested in floating construction, Olthuis offers this advice:

“My advice is to first gain a deep understanding of water dynamics and how they relate to construction techniques,” he said. “It requires a mindset shift, where architects don’t see water as an obstacle but as an opportunity. Collaborating with engineers and specialists in marine technology is essential.”

As cities continue adapting to climate change and population growth, floating architecture may become a mainstream solution for sustainable, adaptive urban expansion, reshaping the future of construction and design in the process.

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Physical, brick-and-mortar shopping malls have been declared ‘dead’ time and again, but their real future is more complicated for builders (from 2022).

The retail shopping mall is dying.

At least that’s the sentiment shared by most. CNBC reports that 25% of malls in the United States are expected to shut down within the next five years. Large mall owners are drowning in debt. The COVID-19 pandemic shattered the brick-and-mortar retail sector as consumers moved much of their shopping online. Developers, cities and towns are searching for ways to make use of already-dead malls, as many seek to convert their remains into affordable housing, offices and gyms.

For others, the shopping mall isn’t dead quite yet. Yes, the great indoor shopping mall—where teenagers congregate, food courts flourish and escalators shutter crowds to a multi-level retail experience—is likely in the rearview mirror. But as pandemic lockdowns ease and people are eager to re-enter the world, the in-person, outdoor shopping experience maybe on the precipice of a renaissance.

Join Built, the Bluebeam Blog, in the above video as we dig deeper into the future of malls.

Why converting (or demolishing) dead malls is harder than you think.

Along a 100-mile stretch through the Ozarks lie several of the most significant buildings in American architecture, all designed by Arkansas native son Fay Jones

Like his mentor Frank Lloyd Wright, Fay Jones received the American Institute of Architects (AIA) Gold Medal for his exquisite body of work, which includes his masterpiece, Thorncrown Chapel. Jones designed and built private homes and sacred spaces almost exclusively, always based on the tenets of organic architecture. Here are five of the most compelling.

Fay and Gus Jones House, Fayetteville, 1956

Photo credit: Patrick Farley

“There’s more architecture per square foot than any house I can think of,” said Greg Herman, associate professor, Fay Jones School of Architecture, University of Arkansas. “He takes this footprint, which is really just a rectangle, and changes the way you understand it with layers and elements moving around and shifting so that, in the end, you get a rich environment.”

Jones explored his architectural philosophies in his family home, the first of more than 200 residences he designed. One of the driving principles of organic architecture is fidelity to nature, and that became necessity as much as choice here. While excavating for the home, the builders uncovered a rock ledge and hidden spring. In keeping with Wright’s insistence that organic architecture should arise as a natural solution to the problem presented, Jones integrated the boulder into the living space.

Jones incorporated the rock wall uncovered during excavation into the downstairs, creating a grotto with a small pool, green plants, stone floors, soft lighting and low ceilings. Photo credit: Patrick Farley

Upstairs, the home transforms into a treehouse with a low central stone hearth. Jones selected a lot adjacent to a wooded area and situated the house with the main façade facing west. A balcony and windows offer sweeping views in every direction and let the sun light all the main interior spaces throughout the day, a theme repeated in many other Jones structures.

“You can pretty much find everything he did subsequently in this house in some form,” Herman said.

The Jones House was listed on the National Register of Historic Places in 2000 and is documented in the Historic American Buildings Survey, winning the Charles E. Peterson Prize in 2010.

Richard and Alma Brothers House, Fayetteville, 1957

Photo credit: Tyler McKee

“Fay liked to approach every project fresh, with a renewed, introspective quality based on the knowledge of how materials go together. There’s an honesty to the craft,” said David McKee, principal of McKee Architects and Jones’ apprentice and associate for 16 years.

Early in his career, Jones began designing homes for University of Arkansas faculty, including music professors Richard and Alma Brothers. The Brothers’ budget was conservative, leading to a model based on Wright’s Usonian homes and unique in Jones’ work. Usonian homes center on three primary areas—a living space, open kitchen and dining, and small bedrooms and baths. The sophisticated yet simple floor plan for this home is defined by openness, flow and connectedness with the exterior.

: A fieldstone chimney—the symbolic heart of a Usonian home—rotated 45 degrees to the plan extends through both floors. Photo credit: Patrick Farley

Some elements reappear in later Jones designs—the ridge beam pulled off-center and floor-to-ceiling windows and glass doors that frame expansive views. Panes of glass precisely butted together at the corners let the eye take in the nearby woodland uninterrupted by structural elements. The rectangular hip and gable roof follows the strike of the ridgeline and features a jackknife edge with dentil modeling that’s repeated indoors in the cupboards, countertops and built-in seating that Jones designed.

McKee remains passionate about preserving Jones’ legacy and, in 2021, became the force behind restoring the Brothers House. The city of Fayetteville recently recognized McKee Properties with the 2024 Historic Restoration Award for their meticulous work. Two University of Arkansas students documented the home for the Historic American Buildings Survey in 2022, winning an honorable mention for the Leicester B. Holland Prize. The Brothers House is now open to short-term residents eager to experience a mid-century masterpiece.

Faubus House, Huntsville, 1967

Source: Arkansas Historic Preservation Program.

“He was all about bringing the indoors out and the outdoors in,” said Ronna Precure, steward of Faubus House. “We have quite an extensive area of terraces. When you add that square footage, designed for entertaining and living, we’re over 13,000 square feet.”

The home’s interior spreads out more than 7,356 square feet, making it the largest residence Jones designed. But that’s fitting for a house intended as much for lavish entertaining during Orval Faubus’ unsuccessful run for the Senate as it was for private living—which also explains why the home features four ovens but only three bedrooms.

Both famous and infamous, Faubus served as Arkansas governor from 1955 to 1967, longer than any other person. Although progressive in some ways, he’s remembered for attempting to block the desegregation of Little Rock’s Central High School in 1957, forcing President Dwight D. Eisenhower to send federal troops to enforce the U.S. Supreme Court’s ruling.

This home built for him a decade later extends 214 feet along a bluff, with landscape clearly inspiring form. The home’s most iconic element—a 30-foot cantilevered catwalk—offers the drama of a stroll out over the rocky cliff and into the treetops. Vertical elements like stone columns, apertures and panels draw the eye upward to the three massive chimney stacks perched on the roof.

A visitor can get lost in the trees on the catwalk, hovering in mid-air over the bluff. Photo credit: Patrick Farley

The current owner, Jonathan Formanek, purchased the home in 1995 and intends for it to remain open to visitors. In recognition of Jones’ architecture, Faubus House was listed on the National Register of Historic Places in 2019.

Thorncrown Chapel, Eureka Springs, 1980

Photo credit: Patrick Farley

“A Thin Place” is how C. Page Highfill, AIA Emeritus, described Thorncrown—meaning a place where the distance between heaven and earth collapses. That may be exactly what California schoolteacher Jim Reed envisioned when he asked Jones to design a little glass chapel on his wooded property to inspire visitors.

Although they originally chose an exposed location near the highway, Reed found a natural stone altar hidden in the trees, with rock formations to the right and spectacular woods on the left. Here, like nowhere else, Jones could realize the principle of unity between building and site. “In the end, you hope it will look like man and nature planned the building together to the mutual benefit of both,” Jones said.

The lack of a road meant no structural element could be larger than what two men could carry, so pressure-treated Southern pine 2x4s, 2x6s and 2x12s served as the primary materials. Where these humble pieces of lumber intersect, they form the chapel’s most striking element—hundreds of diamond-shaped apertures that radiate pure light.

Every feature of Thorncrown is a work of art designed by Jones, from the lights to the pews to the fieldstone walls. Photo credit: Patrick Farley

Inspired by Paris’ light-filled Sainte-Chapelle, the chapel rises 48 feet toward the skies with more than 6,000 square feet of glass and 425 windows. Jones referred to the style of Thorncrown as “Ozark Gothic” and himself as a “cathedral builder born 500 years too late.” Although Jones and Reed doubted that anyone would visit Thorncrown, 7 million people have made the pilgrimage to date.

The AIA recognized Jones’ masterwork with a National Honor Award almost as soon as it was built and named it fourth on their list of top structures of the 20th century. Thorncrown Chapel was listed on the National Register of Historic Places in 2000.

Mildred B. Cooper Memorial Chapel, Bella Vista, 1989

Photo credit: Patrick Farley

“I do not pretend to understand the creative process—but, sometimes, in that time of searching, by concentrating with great intensity on some obscure part or small detail, a vast landscape of order and continuity can be illuminated.” — From the writings of Fay Jones shared at the Jones House.

The Cooper family asked Jones, working with partner Maurice Jennings, to design a chapel to honor Mildred Cooper and her deep spiritual beliefs and great love and respect for nature. In the Cooper Chapel, Jones’ “small details” repeat themselves endlessly, with each part relating to the whole—from the door handles to the heavy wooden doors to the interwoven lathes emanating from them and pointing to the circular “rose” window above. Trading the lumber of Thorncrown for the strength of 31 tons of slender steel sheathed in redwood lets 15 pointed arches traverse the structure, creating a harmonious whole that rises 50 feet.

Overhead, sunlight filters through towering trees and enters through a ridgeline aperture, dappling the native limestone and flagstone flooring below. Photo credit: Patrick Farley

The chapel stands on a wooded hillside overlooking Lake Norwood. The 4,460 square feet of glass offers clear views of the outdoors and leaves visitors wondering if the chapel is open to the air. The similarities to Thorncrown are undeniable, and Jones once again produced an “instrument nature can play,” as he described it in “The Generative Idea.”

The Cooper Memorial Chapel was named to the Arkansas Registry of Scenic Resources in 1993.

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Outdoors or in, energy, water and waste create challenges as resorts claim and aim to go green

Since the century started, US ski areas have come up $5 billion short due to climate change, according to a study in Current Issues in Tourism. Ski seasons now run five to seven days shorter than in the glory years of 1960-1979—and the season could shrink even more depending on the pace of global emissions reductions. The result is increased snowmaking costs and decreased revenues from lift tickets, goods and services. The poor conditions for snow from the sky also make snow from machines less than satisfying for skiers paying exorbitant prices.

The solutions for skiers and snowboarders remain limited. They can either travel to higher elevations and latitudes, turn to other mountain sports or go inside. With Ski Dubai making desert skiing an attraction, the last option isn’t so far-fetched.

Worldwide, the number of indoor ski resorts has grown to 124, from Gensler-designed Big SNOW at the American Dream mall in New Jersey to 10 Design’s Huafa Snow World set for a 2025 launch in Shenzhen, China. Now, Australia is inching closer to offering its own indoor ski area. Winter Sports World (WSW) in Penrith, west of Sydney, recently hurdled a major challenge, gaining approval for its State Significant Development Application (SSDA).

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But how do these giant coolers stack up when it comes to the climate change issues that have led to the need to move indoors in the first place? Let’s look closer at Australia’s entry to see how WSW hopes to integrate sustainability and reduce environmental issues that could impact the continent’s alfresco ski resorts.

Architecture inspired by snow

The $400 million complex, envisioned and developed by lifetime Penrith resident Peter Magnisalis, will include a 300-meter (984-foot) advanced open run, learn-to-ski hills, a snow play area, ice climbing and crevasse rock climbing, a 4.5-star 170-room hotel with conference and function rooms, and restaurants and cafes with slopeside views.

“Australia has a limited snow climate, which is expensive, unpredictable and hard to get to,” Magnisalis said. “Our vision is to have an indoor snow resort located within easy reach of Western Sydney that can offer perfect snow and weather every day of the year.”

Dubbed the “Giant Esky” by locals, the alpine façade designed by boutique firm Collins & Turner was inspired by the “shimmering, ephemeral, kinetic energy of snow clouds above a hill,” according to architect Huw Turner. By integrating night lights to conjure ice shards, the façade evokes a blizzard, while the public area and curved lower-level façade conjure melting ice.

The undulating landscape will feature streams, pathways and plantings. Large 8-meter-high (26-foot) message sticks will mimic melting ice and mountains telling stories of the First Nations people and how they lived on the Dyarubbin (Nepean) River. The latter realizes one of the WSW sustainability themes—a place that celebrates the enduring spirit of country and the longstanding connections of Aboriginal people to this place.

Other themes included in the Ecologically Sustainable Development (ESD) report produced by Atelier Ten, environmental design consultants for the project, include climate action, water conscious, circular economy, biodiverse habitat and welcoming and inclusive. They provide direction for specific targets and design initiatives intended to promote sustainable development.

Sustainability demands of a cooler

The “About Us” on the WSW website states, “We’re proud that we’ll be delivering exceptional sustainability outcomes and meeting top green building benchmarks by applying best practice principles of Environmentally Sustainable Development and responding directly to the local environmental challenges of Penrith and Western Sydney.” The promised outcomes include a facility that is net zero carbon ready, resource efficient, resilient, future climate ready and nature positive.

A significant challenge arises from the need for an energy-efficient environment that keeps heat out and cold in. A well-insulated snow box will be critical to keeping snow in the best condition, reducing snowmaking frequency and minimizing associated energy and water use. WSW will rely on thermal mass to regulate internal temperature.

To meet some of the energy demand, the facility plans to use onsite renewable generation from photovoltaic panels on the roof and daily green energy purchases. “We are confident that the solar panels will cater for up to approximately 60% of the electric energy needs for snowmaking,” Magnisalis said.

Likewise, snowmaking requires water, which WSW plans to collect from the facility’s roof, with snow and ice melt filtered and captured into a grey water tank for irrigation, toilet flushing and other non-potable uses. WSW estimates the water required for the initial ramp-up for snowmaking is 2.5 million liters, around the size of an Olympic swimming pool. Builders will connect a 1.6-million-liter tank to the roof as soon as possible during construction to take advantage of rainfall. Within the snow box, the facility will capture condensation and defrost water and reuse it for snowmaking.

Turning aspirations into actualities

WSW states that the facility has been designed to be net-zero carbon ready by “reducing embodied carbon; eliminating fossil fuel use on-site; minimizing energy use; supplying energy with onsite renewable sources; buying green power for remaining energy needs; and offsetting remaining emissions.”

However, Magnisalis deferred questions about the net zero carbon elements pending completion of the detailed design development phase. Still, he said, “We are confident in achieving these benchmarks.”

That said, in the Atelier Ten ESD report for WSW, the firm made clear “it is imperative that sustainability objectives are backed up by an approach to assurance that gives absolute confidence that the claimed outcomes will be achieved.” The firm said the framework should provide independent review, transparent methodology and accountability at each phase of the lifecycle.

Atelier Ten suggested WSW target a 5-star Green Star Buildings rating for the project, a holistic tool for new buildings and major refurbishments in Australia. As part of the SSDA, Atelier Ten included a building appraisal in the ESD report to demonstrate how WSW can achieve a 5-star rating.

It remains to be seen how environmentally sensitive the facility will actually be when built and operating. But as the project evolves, WSW has an opportunity to meet ambitious goals and demonstrate that this indoor ski model doesn’t contribute to the conditions that made heading indoors intriguing in the first place.

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