Get inspired!

17,725 architecture projects

Learn from past Buildner architecture competition participants through our extensive project library, curated over more than 15 years!

Pollution-Eating Concrete and Geothermal Systems in a Communal Gathering Space

Author:
Naomi Taniguchi
Pollution-Eating Concrete and Geothermal Systems in a Communal Gathering Space
Explore the full project presentation!
Subscribers only
Constructed with pollution-eating concrete and equipped with geothermal systems, the building serves as a central gathering space designed to foster community interaction and environmental awareness.
5 key facts about this project
01
Pollution-eating concrete actively reduces air pollutants.
02
A central oculus illuminates the main hall and connects to nature.
03
Fixed concrete benches promote communal interaction without clutter.
04
Geothermal systems enhance energy efficiency for heating and cooling.
05
Extensive glass walls create transparency and visual connectivity.

The Spirala Community Home is designed as a gathering place for people from various backgrounds. Located in a landscape that blends agricultural fields with natural elements, the building focuses on fostering social connections among residents. The concept emphasizes a central hub where community activities take place, supporting an environment of inclusivity and shared experiences.

Main Hall and Oculus

At the heart of the Spirala Community Home is the main hall, a spacious area intended for activities like gatherings, performances, and workshops. This hall features extensive glass walls, which allow abundant natural light to fill the space and create a connection with the outdoors. A central oculus sits above the hall, drawing attention upward and enhancing the feeling of openness. This design element not only serves a functional purpose by illuminating the area but also invites users to appreciate the sky above.

Circulation and Interaction

The circulation spaces around the main hall are thoughtfully designed to allow easy movement for all visitors. These pathways connect different parts of the building, making it accessible for everyone. Minimal interior partitions encourage a sense of openness, while fixed concrete benches create informal seating that promotes social interaction without overwhelming the space with additional furniture. This setup invites community members to engage comfortably with one another, fostering a welcoming atmosphere.

Sustainability and Material Use

Sustainability plays a significant role in the Spirala Community Home’s design. The building incorporates pollution-eating concrete in its foundational and supporting walls. This type of concrete actively works to break down air pollutants using a chemical process activated by sunlight. Additionally, electrochromic glass is used to manage the amount of solar energy entering the building, contributing to energy efficiency by minimizing reliance on heating and cooling systems. A geothermal heating and cooling system further enhances sustainability, while solar panels provide necessary power, aligning with modern ecological goals.

Site Integration and Nature

The design successfully integrates the community home with its natural surroundings. Olive and fig trees are carefully placed around the site, enriching the landscape while establishing a visual and physical connection to nature. The design considers ecological responsibility, creating an inviting atmosphere that encourages residents to engage with both the building and the outdoors. The round shape of the building enhances this relationship, allowing for various outdoor experiences that promote interaction among users and the natural environment.

Noticed a mistake?
Highlight the text and click on
Noticed a mistake

Enter an open architecture
competition now

The Home of 
Shadows
The Home of Shadows
The light studies. Edition #4
The Next House: USA
The Next House: USA
20,000 USD Prize
The Architect's 
Chair
The Architect's Chair
Take a seat and make a statement! Edition #5
Kinderspace
Kinderspace
Architecture for Children’s Development #3
The Architect’s 
Stair
The Architect’s Stair
Take a step and make a statement! Edition #3
Buildner's Unbuilt Award 2026
Buildner's Unbuilt Award 2026
100,000€ Prize / 2026

The Next House: USA — A Global Call to Reimagine the American Suburb

`
Competition organisers

Buildner is launching The Next House: USA, a global architecture competition that challenges architects, designers, and thinkers to reimagine the American suburban home for the 21st century. For decades, the suburban house has symbolized comfort and stability, but today it often reflects excess, isolation, and environmental strain. This competition asks: how can the American home evolve to address climate urgency, economic pressures, and shifting social values?

Participants are tasked with designing a prototype home of no more than 1,500 sq ft (≈140 m²) for a household of two adults and one child. The design should be compact yet generous, adaptable, sustainable, affordable, and replicable across diverse U.S. contexts. More than a design exercise, the competition aims to spark a conversation about how homes can support healthier, smarter, and more connected communities.

The total prize fund is $20,000 USD. The final registration deadline is May 20, 2026, and winners will be announced on September 22, 2026. The Next House: USA invites architects, students, and visionaries worldwide to redefine what the American home means today—and what it should mean tomorrow.

The Next House: USA

Design the next suburban home for the USA

20,000 USD Prize ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Early bird registration deadline 19 November 2025

Open architecture competitions

  • Closest deadline first
  • Project competitions first
    Selected winning projects have the potential to be constructed
  • Ideas competitions
    Experimental competitions with the focus on pushing the boundaries of creativity
new
The Next House: USA

Design the next suburban home for the USA

20,000 USD Prize ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Early bird registration deadline 19 November 2025
new
Iceland 
Slow Sauna

Design slow sauna in Iceland

project COMPETITION
Prize Monetary award
Eligibility Open to all
Early bird registration deadline 26 November 2025
Concrete 
Pavilion

Design a concrete pavilion

Edition #3 ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Final registration deadline 27 November 2025
new
Pavilion Atlas 2026

Design a story of your country

ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Early bird registration deadline 21 January 2026

Recurring architecture competitions

new
The Home of 
Shadows

Design a home with no artificial lighting

The light studies. Edition #4 ideas COMPETITION
Prize Monetary award
Eligibility OPEN TO ALL
Early bird registration deadline 5 November 2025
The Last 
Nuclear Bomb Memorial

Design a memorial that speaks to the cause of ending all nuclear weapons programs

Edition #6 ideas COMPETITION SILENT CONTEST For this competition, NO DESCRIPTION TEXT is allowed. The architecture ideas must be communicated strictly with visuals.
Prize Monetary award
Eligibility Open to all
Final registration deadline 13 November 2025
new
The Architect's 
Chair

Take a seat and make a statement!

Take a seat and make a statement! Edition #5 ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Early bird registration deadline 20 November 2025
Hospice - 
Home for the 
Terminally ill

Design a safe and supportive space to those struggling with a terminal illness

Edition #5 ideas COMPETITION
Prize 10,000 €
Eligibility Open to all
Final registration deadline 26 November 2025
Kinderspace

Design a kindergarten of tomorrow

Architecture for Children’s Development #3 ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Final registration deadline 26 November 2025
Museum of 
Emotions

Use architecture to create different emotional states

Edition #7 ideas COMPETITION SILENT CONTEST For this competition, NO DESCRIPTION TEXT is allowed. The architecture ideas must be communicated strictly with visuals.
Prize Monetary award
Eligibility Open to all
Final registration deadline 27 November 2025
Re:Form - 
New Life 
for Old Spaces

Choose a site—used, abandoned, or forgotten—anywhere in the world, and give it a new purpose

Edition #2 ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Advance registration deadline 3 December 2025
The Architect’s 
Stair

Take a step and make a statement!

Take a step and make a statement! Edition #3 ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Advance registration deadline 15 January 2026
new
Buildner's Unbuilt Award 2026

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

100,000€ Prize / 2026 ideas COMPETITION
Prize 100,000 €
Eligibility Open to all
Early bird registration deadline 26 February 2026

Media, partners and clients

To view this project in detail,
please log in with your
Architects’ Network Plus account.
Subscription instantly unlocks all the architecture projects plus other member-only benefits:
  • Access the 17,725 Concept Library
  • Professional tools including file transfer, email, portfolio management, and more
Register now
Already a member? Log in

This website uses cookies to improve user experience and gather usage statistics.

More information is available in our Privacy & Cookie policy