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Hydroponic Greenhouse with Etfe and Interactive Terraces

Author:
Yuta Sugasawa
Hydroponic Greenhouse with Etfe and Interactive Terraces
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Incorporating a hydroponic system and lightweight ETFE walls, the stepped greenhouse and multipurpose space effectively utilize the land’s contours to create versatile environments for community engagement and sustainable agriculture.
5 key facts about this project
01
Stepped design optimizes sunlight exposure for plant growth.
02
Hydroponic system enhances water efficiency and growth rate.
03
ETFE walls reduce structural weight and improve insulation.
04
Multipurpose space promotes flexible community interactions.
05
Seasonal adaptability allows for winter ice skating and summer gardens.

The design is situated on a landscape marked by distinct contour lines, featuring two main structures: a stepped greenhouse and a multipurpose space. This setting allows for a clear focus on both functionality and interaction. The concept revolves around utilizing the slope of the land to enhance light for the greenhouse while providing flexible seating in the multipurpose area.

Stepped Greenhouse

The stepped greenhouse is designed to maximize light for plants. Terraces are arranged to prevent shading from surrounding foliage, creating ideal growth conditions. The inclusion of a hydroponic system enhances water efficiency compared to traditional soil gardening. This approach allows seedlings to grow faster and showcases a commitment to sustainable practices in agriculture.

Multipurpose Space

In contrast, the multipurpose space features a stepped floor that follows the natural contour lines of the terrain. This characteristic promotes a range of activities without the limitations of walls. The open layout encourages interaction among users. Variations in elevation create informal seating arrangements, accommodating both children and adults and making the space adaptable for different uses.

Seasonal Adaptability

Seasonal adaptability is a key feature of the design. The outer basin serves as an ice rink in winter, ensuring continued use throughout the year. When the weather is favorable, the hydroponic systems extend to outdoor water gardens, enhancing the overall experience. This aspect of the design considers changes in the environment and ensures the architecture remains functional across seasons.

Structural Considerations

The roof of the greenhouse is tilted to capture sunlight effectively during winter. This design choice improves thermal performance and light exposure for the plants. The external walls are made of ETFE, a lightweight material that minimizes the need for heavy structural supports, reducing shading areas. This selection enhances the efficiency of the greenhouse while maintaining a focus on functionality.

The overall design encourages a connection between the built environment and nature. The interplay of stepped forms and surrounding elements fosters a sense of interaction that engages both plants and people, allowing for meaningful experiences in cultivation and community activities.

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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 €
Eligibility Open to all
Final registration deadline 30 October 2025

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