Get inspired!

17,725 architecture projects

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

Spherical Form Constructed with Compressed Earth and Recycled Steel for Sustainable Living

Authors:
José Serrano, Jaime Kelly, Carla Serrano, Luis Bertomeu
Spherical Form Constructed with Compressed Earth and Recycled Steel for Sustainable Living
Explore the full project presentation!
Subscribers only
Constructed using a combination of compressed earth blocks and recycled steel, the building’s spherical form maximizes natural light and ventilation while providing a sustainable living space.
5 key facts about this project
01
Constructed with a modular system for easy assembly and disassembly.
02
Integrates rainwater harvesting systems within the structure for resource efficiency.
03
Utilizes compressed earth blocks for thermal mass and sustainability.
04
Includes bio-digester systems to convert organic waste into biogas.
05
Designed with a spherical geometry to enhance natural light and airflow.

# Architectural Design Report: Terrae – The Worth of Our Soil

## Concept Overview

Located within a context that emphasizes sustainable development, Terrae embodies principles of the Circular Economy to enhance the relationship between human habitation and the natural environment. By prioritizing ecological health, this project integrates innovative architectural practices with an understanding that built environments should serve broader sustainability goals while fulfilling their immediate functions. The design promotes the use of sustainable materials and advanced construction techniques, ensuring the structure's resilience and adaptability over time.

## Spatial Strategy and Materiality

The design employs a spherical geometry constructed from polygonal elements, achieving both aesthetic diversity and structural integrity. This configuration allows for effective force distribution, enhancing the building's stability while evoking organic forms found in nature. Central to the construction are recycled steel and compressed earth blocks, which form the primary structural and thermal envelope. Additional materials, such as wood and translucent polycarbonate, contribute to the interior ambiance and optimize natural light utilization. The incorporation of bio-digester systems exemplifies a commitment to renewable energy and waste reduction, while locally sourced foundation materials reinforce the project's focus on sustainability and support for the local economy.

## Construction and Adaptability

The construction system integrates a robust metallic skeleton with a façade of compressed earth blocks, creating a layered structure that enhances insulation and minimizes energy consumption. Within this framework, a technical core facilitates organized plumbing and electrical systems, while rainwater collection systems illustrate the project's dedication to sustainable resource management. The design allows for adaptable configurations, accommodating various locations and climates through modular elements that simplify assembly and disassembly, making it suitable for both adaptive reuse and site-specific solutions.

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

Enter an open architecture
competition now

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 Home of 
Shadows
The Home of Shadows
The light studies. Edition #4
The Architect’s 
Stair
The Architect’s Stair
Take a step and make a statement! Edition #3
MICROHOME 2026
MICROHOME 2026
100,000 € Prize Fund / Kingpsan Edition #11
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

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 Home of 
Shadows

Design a home with no artificial lighting

The light studies. Edition #4 ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Advance registration deadline 14 January 2026
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
MICROHOME 2026

Design a new concept of small-scale home and share a prize fund of 100,000€

100,000 € Prize Fund / Kingpsan Edition #11 ideas COMPETITION
Prize 100,000 €
Eligibility Open to all
Early bird registration deadline 11 February 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