Circular Economy: The Latest Architecture and News

At the end of each edition of the Architecture Biennale, far from the public eye, tons of exhibition materials are transported across Venice in handcarts and boats. Only a small portion of these materials is reused. The main obstacles are the limited storage space in Venice and the high logistical costs—recurring challenges for circular architecture. As a result, most of the waste ends up in landfills or nearby recycling centers. But this scenario is beginning to change. In response to growing environmental concerns, architects are developing strategies to make reuse more viable. These efforts go beyond architectural and construction decisions—they also involve logistics and international trade.

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In recent years, architecture has increasingly embraced adaptability, flexibility, and responsiveness as core design principles. This evolution reflects a shift from traditional notions of static, permanent structures to dynamic environments that can adjust to changing needs and conditions. Central to this transformation is the concept of "soft architecture", which leverages pliable materials and innovative systems to create spaces that are functional, sustainable, and user-centric. Soft architecture takes shape through membranes that breathe, façades that move, structures that inflate or fold, and surfaces that bend rather than break. It involves designing for transformation — not only in how a building performs environmentally, but also in how it can accommodate shifting functions, user interactions, or temporary occupations. This approach to building challenges traditional notions of durability and control, proposing instead a more responsive and open-ended architecture. It reflects a growing awareness that buildings, like the societies they serve, must be able to evolve.

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In partnership with the European Cultural Center (ECC), ArchDaily has launched its inaugural exhibition as part of the seventh iteration of Time Space Existence, an architectural showcase occurring concurrently with the 19th Venice Architecture Biennale. Open from May 10 to November 23, 2025, in various locations throughout Venice, this edition centers on the theme of "Repair, Regenerate, and Reuse," promoting innovative and sustainable approaches in architecture. ArchDaily's contribution is located at Palazzo Mora, complementing other venues like Palazzo Bembo, Marinaressa Gardens, and Palazzo Michiel.

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During the Time Space Existence exhibition, organized by the European Cultural Centre in Venice, Pritzker Prize-winning architect Alejandro Aravena and his firm ELEMENTAL unveiled a full-scale prototype for a new approach in incremental housing solutions. Titled the USB Core, standing for Basic Services Unit housing prototype, this proposal aims to demonstrate how efficient construction can provide all the essential housing components in a minimal space. The prototype is also the result of a collaboration between the architecture office and concrete manufacturer and researcher Holcim, and is built out of a newly developed type of net-zero concrete mix. It also incorporates fully recycled aggregates, in alignment with circular economy principles. The collaboration aims to demonstrate a more environmentally conscious yet cost-effective way of providing essential services to at-risk communities without harming the planet.

While on site in Venice, ArchDaily's managing editor Maria-Cristina Florian had the chance to sit down with Alejandro Aravena and discuss the implications of this collaboration, the urgent need for housing, and the role of the architect as the coordinator of a process involving many actors.

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Material intelligence refers to how materials perform, adapt, and interact with ecological and cultural systems. It considers how stone, steel, or timber respond to intertangled forces, how those materials are sourced and assembled, and how they persist after demolition. Designers are centering material intelligence in constructing our cities in a generation of environmental uncertainty and strained supply chains.

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Officially open since April 13 as part of Expo 2025 Osaka, the German Pavilion, designed by LAVA Architects. brings to life the theme of the circular economy. Previously unveiled under the title "Wa! Doitsu" (translated as "Wow! Germany"), the Pavilion explores concepts around circularity, showcasing the "terminological culmination of the sustainability discussion." Focusing on returning all consumable goods to the cycle of the economy, achieving zero waste, and minimizing resource consumption, the theme is visible throughout the entire design.

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In a context where sustainability and material identity are becoming priorities in architecture, some ancient materials are finding new life. Terrazzo, with origins dating back to the 15th century, stands out as an example of how tradition can fuel innovation. The modern form, as we know it today, emerged in 15th-century Venice, Italy, when Venetian mosaic workers, seeking to make use of marble scraps, began incorporating these irregular fragments into mortar to create durable and visually appealing surfaces for terraces around their homes. This approach not only minimized raw material waste but also led to the development of new surface-finishing techniques, evolving from manual stone rubbing to the use of a heavy, long-handled grinding stone known as a galera.

Boston City Hall, one of the most debated examples of Brutalist architecture in the United States, has significantly transformed since its conception. Designed by Kallmann, McKinnell, and Knowles and completed in 1968, the fortress-like concrete exterior and geometric austerity have long divided public opinion. Critics, including a former mayor, called for its demolition for decades arguing that its imposing design was inhospitable, inefficient, and most importantly, not beautiful. However, rather than tearing it down, Boston has chosen to renovate and revitalize the structure, demonstrating that contested Brutalist architectural styles can be adapted for a more sustainable future.

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Social fragmentation and economic divides have fractured the fabric of urban environments. In this context, ecovillages emerge as influential remedies to societal and ecological crises, microcosms where sustainable living, social cohesion, and economic resilience drive urban growth. Rooted in environmental stewardship and circular systems, ecovillages offer a scalable model to inspire the development of regenerative urban neighborhoods across the world. Traditional urban and suburban development has led to sprawl and social isolation which have had detrimental effects on community cohesion and the environment. Alongside this phenomenon, cities have become inhumane, characterized by anonymity, unaffordable housing, traffic congestion, and pollution. The lack of access to nature solidifies these issues, leaving many urban dwellers disconnected from elements that promote well-being and a sense of belonging.

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Sustainability has been deeply rooted in EGGER's corporate DNA since 1961. Long before it became a global imperative, Fritz Egger Sr. recognized the immense value of wood and laid the foundation for a business model built on responsible resource use. Working in closed cycles is a central element of the corporate philosophy. The wood-based material specialist gives the valuable resource of wood many lives and assumes comprehensive economic, ecological and social responsibility. 

For decades, the life cycle of buildings was a simple formula: planning, design, construction, demolition, and, of course, the great villain in this history: the landfill. Over time, architectural practice began embracing concepts like reuse, disassembly, and circular demolition, but often as secondary elements, part of the gradual shift toward a circular economy in construction. But what if these principles were no longer exceptions? What if we crafted or chose every building component to maintain value and purpose beyond its original use? The truth is, there is life after demolition. This transition—from demolition to practices focusing on reuse, repurposing, and sustainable dismantling—is edging closer to reality. By the time 2030 arrives, we could fundamentally reshape how we approach processes, buildings, and the market itself. As these changes unfold, we must assess how our strategies align with the evolving goals and challenges related to sustainability—and, of course, the new opportunities they bring.

Sustainability has been a central theme in architectural discussions for years, encompassing not only the profession’s role in combating climate change and transitioning to low-carbon economies but also preserving cultural heritage and celebrating vernacular traditions. In 2024, a wave of projects and studies stood out for their innovative use of natural materials, particularly in the Global South. These initiatives skillfully blend creativity and technology with renewable resources, demonstrating how architecture can deliver high-quality spaces that align with contemporary demands for sustainability and environmental responsibility.

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Originally designed by Modernist architect and designer Alvar Aalto in 1971, Finlandia Hall represents one of Helsinki's most important modernist works of architecture. In early 2022, an extensive renovation project began, led by Finnish architecture firm Arkkitehdit NRT, aiming to make the venue more accessible to the wider public and create additional services while respecting Alvar Aalto's original design. After three years of renovation, Finlandia Hall officially reopens on Saturday, 4 January 2025.

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The UK Pavilion, designed by London-based Woo Architects, in collaboration with Japanese contractor ES Global, has been completed at the Expo 2025 in Osaka. Built on the principles of a circular economy, the pavilion features a modular, 10-by-10-meter gridded structure designed that prioritizes ease of assembly, disassembly, and relocation. Ultimately, the pavilion's design reflects the Expo's theme, "Come Build the Future," embodying sustainability and reuse.

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Lydia Kallipoliti is a recognized architect, author, and educator whose research has transformed the way architecture engages with the pressing challenges of sustainability, technology, and environmental politics. As an Associate Professor at Columbia University's Graduate School of Architecture, Planning, and Preservation (GSAPP), Kallipoliti's approach to architectural education encourages students to confront critical issues such as waste, reuse, and closed-loop systems. Her pedagogical philosophy empowers students to see design not only as an aesthetic or functional pursuit but as a powerful tool for addressing global ecological crises, urging them to think systemically and creatively about the future of the built environment.

In addition to her role in academia, Kallipoliti has authored works such as The Architecture of Closed Worlds and Histories of Ecological Design: an Unfinished Cyclopedia, which delve deeply into the relationship between architecture and environmental politics. Her research and writings have sparked discourse on methods for architects to reconsider traditional design paradigms and embrace sustainability as a core tenet of architectural practice.

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Pavilions offer architects a unique opportunity to experiment, serving as compact spaces that push the boundaries of design and spatial concepts. Free from many conventional functional constraints, these structures allow for artistic expression and the testing of new technologies. Pavilions often act as living laboratories of architecture, positioned in public or cultural contexts. They transform their surroundings into interactive, memorable experiences, providing a stage for architects to showcase their most innovative ideas. In recent years, climate responsiveness has emerged as a crucial focus in pavilion design. By using temporary structures as a testing ground for more sustainable practices, architects can experiment with alternative materials and environmentally conscious approaches that address the climate crisis.

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Foster + Partners, in collaboration with the Maldives Fund Management Corporation (MFMC), has unveiled the masterplan for Gaafaru, an inhabited island in the Kaafu Atoll of the Maldives. This project is designed to ensure a sustainable and resilient future for the island by addressing the critical challenges posed by climate change, rising sea levels, and social inequalities. At the heart of this plan are six guiding principles that aim to balance environmental protection with community prosperity, creating a model of future-proof island development.

Throughout history, it has become clear that the key to long-lasting and sustainable projects is to lay solid foundations. Our society is headed towards a more urban future in which the density of metropolises will be ever greater. That is why this more urban tomorrow requires modern urban planning capable of building innovative, sustainable and flexible structures. Because the only way to make our society live better is to build better.