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Rainwater-Collecting Home with Hydroponic Garden and Recycled Elements

Authors:
Li Kuang Pung, Yue Mao, Jie Lyn Koh
Rainwater-Collecting Home with Hydroponic Garden and Recycled Elements
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With a Trombe wall for thermal mass and a hydroponic garden integrated into its structure, this home utilizes recycled materials and rainwater collection to create a self-sufficient living environment.
5 key facts about this project
01
Rainwater is collected through a curved roof designed for optimal surface area.
02
Greywater is treated and reused in a filtration zone with plant integration.
03
A hydroponic garden is featured on the exterior, promoting food production.
04
The design includes a Trombe wall for passive solar heating and thermal mass.
05
Recycled construction materials are utilized to minimize environmental impact.

Shelter is a carefully designed home that addresses important environmental issues. Located in an area where resource scarcity is becoming more prominent, the dwelling prioritizes sustainability and self-sufficiency. It aims to establish a strong connection between its residents and the natural surroundings. The design emphasizes essential needs such as water and food, creating a living environment that encourages a lifestyle in harmony with nature.

Water Management

The design features a curved roof and slanted walls to effectively collect rainwater, which is stored in an underground tank for use in showers and washing. Greywater from these activities is redirected to a filtration area that includes plants behind a Trombe wall, enhancing water reuse by sending treated water back to the toilet. This integrated system also manages blackwater, with sewage processed at a central drain field designed to enrich the local soil and support farming endeavors.

Food Production

The home includes raised ground along the eastern side that functions as a garden bed for growing crops. This design element makes use of recycled construction materials and only a small amount of topsoil, aligning with principles of minimal waste. Additionally, the exterior features screens that allow for hydroponic gardening, offering an alternative means of food production while contributing to the overall ecological impact of the structure.

Energy Generation

Solar panels are positioned on the roof and curved facade. These panels help lessen reliance on traditional energy sources and aim to decrease the building's carbon footprint. The design also incorporates passive thermal controls, which improve energy efficiency. This approach makes it possible for the interior to remain comfortable without overusing heating or cooling systems.

Thermal Regulation

A Trombe wall with considerable thermal mass is located on the western side of the building to collect and hold solar heat during the day. This design keeps the upper living spaces warm at night. Insulating practices on the eastern wall also help maintain a comfortable temperature. Additional ventilation strategies, including vents along the retaining wall and operable skylights, help promote natural cooling, adding to the home’s energy efficiency.

These thoughtful design features create a living space that represents a step toward sustainable living. The careful selection of materials, including recycled construction waste and the planning of gardens, highlights a practical approach that serves both functionality and environmental goals. The result is a home that embodies a commitment to balance and resource management.

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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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Competition organisers

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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