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Floating Greenhouses with EPS Framework for Urban Ecology

Authors:
Jovana Stefanović, Viktorija Čeliković, Željko Mijušković, Nikola Stanišić
Floating Greenhouses with EPS Framework for Urban Ecology
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Featuring an innovative EPS framework, floating greenhouses enhance both ecological restoration and public access along Belgrade's waterfront, providing vital communal spaces for interaction and recreation.
5 key facts about this project
01
Floating structures designed to adapt to changing water levels.
02
Incorporation of a closed EPS cell system for buoyancy and insulation.
03
Maximized sunlight absorption through varied geometric forms.
04
Use of polyurea for enhanced durability against environmental exposure.
05
Community-focused layout encourages public interaction and engagement.

Aquaville is an architectural design located along the Belgrade waterfront, where the Sava and Danube rivers meet. The aim is to address urban planning issues while improving public access to the waterside. Mini floating greenhouses are introduced as part of the landscape, drawing on local splavovi culture, where rafts are often used for social gatherings. The design emphasizes sustainability and community involvement, focusing on restoring the natural environment.

Materiality

At the core of Aquaville’s structure is expanded polystyrene, often referred to as EPS. This material is lightweight, made up of about 98% air within a network of closed cells. It provides the necessary buoyancy for floating elements while also being environmentally friendly. The design incorporates protective coatings of concrete and polyurea, offering additional durability against environmental wear and tear. This thoughtful combination of materials helps ensure long-term performance while contributing to energy efficiency.

Sunlight Optimization

The buildings in Aquaville are designed to make the most of natural light. The cube form allows sunlight to penetrate about 30% of its surfaces, while the cylindrical shape increases this to roughly 70%. The half-spherical design maximizes sunlight exposure, reaching an absorption rate of 85%. By prioritizing daylight, the architecture not only improves energy efficiency but also enhances comfort within the spaces.

Community Engagement

Aquaville addresses the challenge of limited urban spaces by creating shared public areas. Replacing existing nightclubs with eco-friendly structures, the project encourages community interaction and provides new recreational zones. This initiative emphasizes the need to connect city dwellers with nature, fostering a sense of belonging and enhancing the overall urban experience.

The design culminates in a series of thoughtfully arranged floating greenhouses that offer practical benefits while being visually appealing, contributing to the ecological revitalization of the riverside and inviting sunlight into everyday life.

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The Buildner’s Unbuilt Award 2025: Celebrating Architectural Creativity and Visionary Unbuilt Designs with a Total Prize Fund of €100,000

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The Buildner’s Unbuilt Award 2025 is an international architecture competition dedicated to recognizing and celebrating the value of unrealized architectural designs. It invites architects, designers, and students worldwide to submit visionary projects that have not yet been constructed, highlighting the power of ideas and the creativity behind the design process. By focusing on unbuilt work, the competition aims to bring forward concepts that shape the future of architecture and push the boundaries of the profession. 

Participants can compete in three categories based on project scale: Small Wonders (up to 100 m²), Medium Marvels (101–999 m²), and Large Visions (over 1,000 m²). Each category winner will receive €20,000, and additional prizes include honorable mentions, student awards, and a special Best Presentation Award. Winning projects will gain significant international exposure through Buildner’s publicity campaign and a feature article on ArchDaily, providing a unique opportunity to showcase creative ideas to a global audience. 

The Buildner’s Unbuilt Award 2025 encourages entrants to submit any type of unbuilt project, from conceptual visions to detailed designs, celebrating bold innovation without the constraints of realization. Important deadlines: registration closes on October 30, 2025; submissions are due by November 20, 2025; winners will be announced on December 17, 2025.

Buildner's Unbuilt Award 2025

Celebrating your unbuilt architecture visions with a €100,000 prize

100,000€ Prize / 2025 ideas COMPETITION
Prize 100,000 €
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Final registration deadline 30 October 2025

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