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Hexagonal Structures Made from Recycled Plastics Blending with Natural Wood in Sustainable Coastal Living

Hexagonal Structures Made from Recycled Plastics Blending with Natural Wood in Sustainable Coastal Living
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Crafted from modular hexagonal components and incorporating recycled plastics alongside natural wood, this coastal dwelling offers a sustainable solution for resilient living in vulnerable marine environments.
5 key facts about this project
01
Hexagonal design allows for flexible configurations and efficient use of space.
02
Constructed with recycled plastics for enhanced durability and environmental responsibility.
03
Integrated vertical farming systems support local food production within the dwelling.
04
Passive ventilation and cooling strategies minimize reliance on mechanical systems.
05
Floating community layout encourages social interactions while preserving individual privacy.

### Project Overview

H2O: HEX HOUSE OCEANIA is designed to address climate change and rising sea levels through its sustainable housing concept located in coastal ecosystems. This architectural solution prioritizes environmental resilience and self-sufficiency, enabling communities to adapt to oceanic habitats while engaging with pressing ecological challenges.

### Spatial Organization and User Interaction

The HEX HOUSE employs a modular, hexagonal layout that accommodates autonomous living while fostering connections among residents. Each unit is designed to optimize privacy and personal space, while communal areas within the broader floating community encourage social interaction. The compact interior, approximately 25 square meters, effectively integrates essential spaces such as kitchens, dining areas, and living quarters, promoting multifunctionality through adaptable furnishings, including foldable beds and expandable tables. This design strategy ensures residents can utilize the space efficiently while maintaining privacy and a sense of community.

### Sustainable Technologies and Materials

Key technological features within the HEX HOUSE enhance its ecological footprint. Solar panels on rooftops generate renewable energy, while vertical farming systems allow residents to cultivate food onsite, reducing transportation needs and enhancing food security. Advanced water conservation systems, including rainwater harvesting and desalination, ensure access to clean water. The use of sustainable materials, such as recycled plastics for structural elements, reinforced concrete for durability, and large glass windows for natural lighting, contributes to energy efficiency and responsiveness to the local environment. This combination of design elements serves both functional and aesthetic purposes, aligning with contemporary sustainability goals.

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The Home of 
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The Home of Shadows
The light studies. Edition #4
The Next House: USA
The Next House: USA
20,000 USD Prize
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Chair
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Kinderspace
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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 
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Design slow sauna in Iceland

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

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The Home of 
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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
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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 
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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
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Final registration deadline 27 November 2025
Re:Form - 
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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 
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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
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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

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