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Spiral Formation with Timber and Concrete in a Community Hub

Authors:
Debora Cheng, Jennifer Huang, Krish Girdhari
Spiral Formation with Timber and Concrete in a Community Hub
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Constructed with a spiral layout and incorporating sustainable timber and concrete, the building serves as a multifunctional community hub, dedicated to fostering social interaction and environmental responsibility.
5 key facts about this project
01
The building features a spiral circulation path that encourages communal interaction.
02
It uses in-situ concrete walls complemented by glass partitions for natural light.
03
Rainwater collection is integrated within the roofing system for sustainability.
04
A community kitchen supports farm-to-table practices and encourages collaboration.
05
The design includes a reflection garden for personal contemplation and relaxation.

The Spirala Community Home is located in the north-west region of Proença-a-Velha, Portugal. This place has mild winters and hot, dry summers. The structure serves as a gathering space for the community, designed to encourage social interaction while responding to the environmental conditions. The main idea behind the design is to blend sustainability with the agricultural landscape, honoring the local heritage of farming.

Site Organization

The layout of the site is carefully planned into specific zones for different activities. The Community Zone includes spaces for workshops and classes, aimed at bringing people together. There is also an existing agricultural building that plays an essential role in supporting local farming. The Vineyard Zone is dedicated to growing crops, while a Wilderness Zone is preserved to protect the natural landscape and promote a connection with the environment.

Interior Programming

Spaces within the Spirala Community Home accommodate a range of activities such as performances, workshops, and yoga sessions. Important features like composting toilets and a community kitchen support sustainable practices and enhance the communal living experience. Additionally, a reflection garden serves as an outdoor area for personal contemplation, creating a balance between indoor and outdoor settings.

Architectural Framework

The building’s design focuses on durability and efficiency. The roof is made with metal over timber trusses, designed with integrated gutters for rainwater collection. In-situ concrete walls combined with glass partitions allow natural light to flow in, making the interior feel spacious and open. Water features placed throughout the site add to the aesthetic appeal and strengthen the connection with nature.

Sustainability Initiatives

Sustainability is a central concern for the Spirala Community Home. Systems for rainwater harvesting and greywater recycling demonstrate a commitment to minimizing environmental impact. Composting toilets help reduce waste, while photovoltaic solar panels enable the building to generate its own energy. There is also a rainwater filtration system in place, ensuring access to clean water.

Circulation around the building follows a round spiral layout. This design encourages movement and interaction among users. The combination of open communal spaces captures the essence of living together as a community.

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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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