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Cocoon-Shaped Retreat Crafted from Mycelium with Elevated Functionality

Authors:
Mathis Hedouin-leroux, Léa Drouin, Ilmari Talvitie, Mikaela Andersson
Cocoon-Shaped Retreat Crafted from Mycelium with Elevated Functionality
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Crafted from mycelium and designed in a cocoon shape, this elevated retreat harmonizes with its natural setting, promoting sustainability while providing a serene space for living and reflection.
5 key facts about this project
01
Crafted entirely from mycelium, emphasizing renewable materials.
02
Elevated structure reduces ground impact and enhances views.
03
Design incorporates large ceiling windows for natural light access.
04
Low entrance fosters a respectful connection to nature.
05
Rainwater collection system supports self-sustaining living.

Brahman is an architectural retreat designed to foster a deep connection with nature. It is set in a tranquil landscape, intended to serve as a sanctuary for those seeking respite from the fast-paced demands of urban life. The design embraces organic forms, resulting in a cocoon-shaped structure that emphasizes harmony between the built environment and its natural surroundings.

Materiality and Structure

The retreat prominently features mycelium as the main construction material. Mycelium is the root structure of fungus. It is chosen for its excellent mechanical performance and its positive environmental impact. The building consists of three mycelium shells that are shaped using molds, supported by timber elements that add stability and warmth to the overall appearance. This choice of material reflects a commitment to sustainability.

Functional Zoning

Brahman includes various areas designed to enhance user experience. It has specific zones for living, cooking, and quiet relaxation, which allows occupants to engage with the space in different ways. The layout supports both individual and group activities, making it versatile for different needs.

Connection to Nature

Natural light fills the interior through large windows in the ceiling, providing views of the surrounding landscape. The entrance is designed with a low profile, creating a gentle bowing effect. This design choice symbolizes respect for nature and encourages a feeling of connection between the inside and outside. It invites occupants to engage with the environment as soon as they arrive.

Sustainable Practices

The design highlights a commitment to sustainability. Rainwater collection minimizes the need for external water sources. Heating is provided through a portable chimney that can also serve for cooking. This practical approach aligns with the retreat's minimalist values, allowing for efficient living within a natural setting.

Occupants enter through a thoughtfully designed entrance, where the low threshold encourages a respectful approach to the environment outside. It presents a clear invitation to engage fully with the natural setting, welcoming visitors into a space that embodies simplicity and attention to the world around it.

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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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