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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

Project in-detail

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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MICROHOME 10: Celebrating Small-Scale Living with €100,000 Prize Fund and Kingspan’s Innovation

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Competition organisers

The MICROHOME 10 competition invites participants to submit visionary designs for off-grid, modular microhomes that push the limits of sustainable, small-scale living. Organised by Buildner in partnership with Kingspan and Hapi Homes, this tenth edition sets the challenge of designing a dwelling for two people within a maximum floor area of 25 m², encouraging bold solutions adaptable to any urban or rural location. The competition continues Buildner’s mission to foster innovative approaches to compact, energy-efficient housing that can address pressing global challenges.

This year’s edition offers a generous total prize fund of €100,000, including the Kingspan Award for designs that integrate high-performance Kingspan products and the Hapi Homes Award for a project selected for real-world construction. In addition to cash prizes, the winners gain international exposure through Buildner’s media partnerships, publications, and a dedicated MICROHOME magazine, further amplifying their ideas to the wider architectural community.

Key dates for MICROHOME 10 include the closing date for registration on 25 September 2025, the submission deadline on 29 October 2025 (11:59 p.m. London time), and the announcement of winners on 9 December 2025. These milestones ensure participants have clear timelines to develop and present their concepts, with early registration discounts available to support students and emerging designers worldwide.

MICROHOME

Design a new small-scale home concept in the 10th edition of MICROHOME — 100,000 € prize + construction

100,000 € Prize Fund / Kingpsan Edition #10 ideas COMPETITION
Prize 100,000 € + Potential realisation
Eligibility Open to all
Final registration deadline 25 September 2025

Enter an open architecture
competition now

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