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Composting Toilet and Rainwater Systems in Compact Living

Author:
Heather Potts
Composting Toilet and Rainwater Systems in Compact Living
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Equipped with a composting toilet and efficient rainwater systems, the design focuses on sustainability and functionality in a compact living structure that meets the needs of modern urban life.
5 key facts about this project
01
Composting toilet system integrated for improved sustainability.
02
Rainwater collection enables efficient water management.
03
Zones designed for specific functions optimize space usage.
04
Maximum natural light achieved through strategic orientation.
05
Outdoor garden space encourages connection with nature.

The Microhome project takes a thoughtful approach to compact living, responding to the challenges of urban environments where space is limited. It focuses on maximizing functionality while prioritizing comfort and sustainability. The design outlines clear divisions between public and private areas, accommodating various daily activities such as work, cooking, sleeping, and relaxation.

Functional Zones

The layout organizes the Microhome into distinct areas that fulfill specific functions. A dedicated work area is included within the overall design, ensuring that residents have a space for productivity. The living and cooking areas are combined to support social interactions, while the sleeping quarters are designed to offer privacy and rest. The incorporation of outdoor gardening space highlights the importance of connecting indoor living with nature.

Natural Light Optimization

Optimizing natural light is a major consideration in the design. The orientation of the Microhome allows for maximum exposure to northern, western, and southern sunlight. This careful arrangement reduces reliance on artificial lighting, enhancing the aesthetic experience of the interior and promoting energy efficiency. Such approaches contribute to a more sustainable and pleasant living environment overall.

Sustainable Water Management

Sustainable water management features prominently in the Microhome's design. Several systems are implemented to ensure efficient use of resources. For instance, a composting toilet serves as a responsible sanitation solution. Additionally, rainwater collection systems capture valuable water, reducing consumption. There is also a specific irrigation zone and a cistern designed to store rainwater for reuse, facilitating the maintenance of the garden and illustrating a commitment to environmental responsibility.

Ventilation and Thermal Comfort

The design pays particular attention to ventilation and thermal stability. Proper airflow is essential for maintaining comfort and air quality. Various strategies are included to enhance thermal stability, which addresses the challenges of different weather conditions. This focus ensures that the living space remains pleasant throughout various seasons of the year.

Each aspect of design blends functionality and sustainability, highlighted by the connection between indoor and outdoor spaces. The result is a living environment that fosters a sense of community while being attuned to the natural world.

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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.

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