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Compressed Earth Blocks and Rainwater Harvesting in a Sustainable Community Shelter

Compressed Earth Blocks and Rainwater Harvesting in a Sustainable Community Shelter
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Utilizing compressed earth blocks and a rainwater harvesting system, this sustainable community shelter offers an adaptable living environment designed to address the housing needs of low-income families.
5 key facts about this project
01
Utilizes locally sourced compressed earth blocks for structural integrity and insulation.
02
Incorporates a dual water management system for efficient rainwater harvesting and greywater reuse.
03
Features a flexible interior layout that adapts to various family sizes and living arrangements.
04
Includes integrated community gardens to promote food security and social interaction.
05
Design enhances natural ventilation and temperature regulation through strategic orientation and openings.

### Overview

Located in South Africa, the Mud House project addresses critical issues of resource scarcity and housing accessibility, developed between 2015 and 2020 during a significant water crisis. This initiative presents a prototype for sustainable living, utilizing local materials to construct affordable housing that minimizes environmental impact. The design focuses on promoting community resilience and fostering a collaborative environment among residents.

### Spatial Efficiency

The architectural layout emphasizes compactness and functionality, enhancing spatial efficiency throughout the home. Open living spaces are created to adapt to the diverse needs of residents, with designated areas for communal activities, relaxation, and private living. This strategic arrangement facilitates an optimal flow within the household, encouraging interaction while maintaining private zones.

### Sustainable Material Use

The Mud House employs a variety of sustainable materials that underscore its commitment to environmental responsibility. Compressed earth blocks, sourced from local soil, form the primary walls, offering excellent insulation and temperature regulation. Timber frames, obtained through sustainable practices, provide structural support, while sandbags serve as durable insulation elements. The design also incorporates a green roof system to promote biodiversity and effectively manage water runoff. Each material choice is intentional, aligning with both budgetary considerations and environmental sustainability.

### Water and Energy Management

Effective water management is integral to the Mud House, featuring systems that capture, filter, and recycle resources. A rainwater harvesting system collects runoff from sloped roofs into storage tanks, complemented by greywater recycling for household activities, which reduces waste. The architectural design incorporates natural ventilation through high ceilings and strategically placed openings to enhance airflow, decreasing dependence on mechanical cooling. Orientation and thermal mass principles optimize natural light and passive heating, further reducing energy consumption.

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MICROHOME 2026
MICROHOME 2026
100,000 € Prize Fund / Kingpsan Edition #11
The Next House: USA
The Next House: USA
20,000 USD Prize
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

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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
Advance registration deadline 18 February 2026

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Buildner's Unbuilt Award 2026

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

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