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Clay Walls and Greywater Recycling in a Sustainable Yoga Retreat

Authors:
Diana Schcolnik Goren, Ganit Kauffmann
Clay Walls and Greywater Recycling in a Sustainable Yoga Retreat
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With insulated clay walls and a greywater recycling system, the design promotes ecological sustainability while serving as a dedicated space for yoga practice within its serene natural setting.
5 key facts about this project
01
Unique passive heating strategies enhance energy efficiency.
02
The design includes a dedicated outdoor terrace for social interaction.
03
Rainwater and dew harvesting systems optimize water use.
04
Insulated clay walls provide excellent thermal mass.
05
The project minimizes site disturbance by reusing excavated soil.

The Yoga Solar House is located in Vale de Moses Yoga Retreat in Portugal. It serves as a space for yoga practice while blending with the surrounding nature. The design focuses on sustainability and energy efficiency, with a concept centered around maximizing sunlight and reducing energy use. The structure provides an environment that encourages relaxation and mindfulness.

Orientation and Form

The building is strategically oriented to take advantage of the sun’s path. The main façade faces west, allowing significant winter sun exposure while offering shade from the hot summer sun. This thoughtful orientation enhances the comfort of users and employs passive heating strategies essential for maintaining energy performance.

Functional Zoning

The Yoga Solar House consists of two main volumes. The practice area is located to the west, while the service area, which includes the kitchen, showers, and toilets, is on the east. This clear division of functions helps organize the space effectively. Between these two volumes lies an outdoor terrace that serves as a social area, encouraging interaction among users and creating a sense of community.

Material Considerations

The project incorporates insulated clay block walls and a concrete ceiling. These materials are chosen for their structural strength and thermal mass. By selecting these options, the design supports durability and energy efficiency, optimizing the building’s performance. The material choices reflect a commitment to thoughtful and sustainable design.

Water Management Strategies

An important feature of the Yoga Solar House is its water management system. It uses a combination of rainwater and dew harvesting alongside a greywater recycling process. This design promotes resource use efficiency and aligns with ecological sustainability. Through these strategies, the building minimizes its environmental impact and utilizes local climatic conditions effectively.

The sloped roof of the Yoga Solar House follows the natural contours of the cliff. This design element not only integrates the building with its landscape but also harnesses solar energy for effective energy generation.

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

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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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