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Elevated Retreat with COB Construction and Petal Roof Design

Authors:
Charlotte Heinrich, Celine Kratky, Justina Awadalla
Elevated Retreat with COB Construction and Petal Roof Design

Project in-detail

With a distinctive petal roof and elevated structure utilizing COB construction, the hut offers a sustainable retreat designed for meditation and harmony with the surrounding landscape.
5 key facts about this project
01
Rumdul flower inspiration informs the organic shape of the hut.
02
The structure incorporates a three-petal roof design.
03
COB construction using local materials enhances sustainability.
04
Elevated on stilts to mitigate flooding and improve ventilation.
05
Multifunctional walls provide integrated storage solutions.

The Mitrella Mesnyi sustainable hut is a well-designed structure located in the rural landscape between Phnom Vour Mountain and the south coast of Cambodia. It serves as a retreat and meditation space, merging traditional Cambodian building practices with modern sustainability concepts. The design takes inspiration from the Rumdul flower, known locally as Mitrella Mesnyi. This connection to nature shapes both the forms of the hut and its relationship with the surrounding environment.

Architectural Form

The design features an organic floor plan and a facade that lacks sharp edges. The roof structure resembles three petals, allowing the building to flow with the natural context. By being elevated on stilts, the hut not only embraces traditional construction methods but also provides protection from flooding and improves air circulation. The architecture promotes a strong bond with the landscape and enhances the overall visual experience.

Materiality and Construction

The hut is built using the COB construction method, making use of natural materials like clay, sand, and earth. These materials ensure a low environmental impact during construction while providing good thermal efficiency. The durable COB technique helps the structure withstand common challenges, such as termite damage and seismic activity, making it a sensible choice for long-lasting living spaces.

Spatial Organization

Inside, the layout focuses on openness and practical use of space, creating a calming atmosphere. The living area connects smoothly to the kitchen, relaxation space, and bathroom. This arrangement reflects traditional two-story homes in Cambodia while maximizing efficiency. The staircase leading to a sleeping loft above the bathroom also maintains a welcoming atmosphere and encourages movement throughout the space.

Innovative Features

Storage is cleverly integrated into the walls and stairs, allowing for organization without overcrowding the interior. There is also an outdoor meditation area with wooden planks and a canvas roof, designed for quiet reflection and relaxation. This thoughtful inclusion of both indoor and outdoor elements enriches the experience for occupants, inviting them to connect with nature.

The Mitrella Mesnyi sustainable hut stands out for its unique roof petals and stilted foundation, which both enhance its aesthetic and ensure environmental resilience.

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MICROHOME 10: Celebrating Small-Scale Living with €100,000 Prize Fund and Kingspan’s Innovation

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Competition organisers

The MICROHOME 10 competition invites participants to submit visionary designs for off-grid, modular microhomes that push the limits of sustainable, small-scale living. Organised by Buildner in partnership with Kingspan and Hapi Homes, this tenth edition sets the challenge of designing a dwelling for two people within a maximum floor area of 25 m², encouraging bold solutions adaptable to any urban or rural location. The competition continues Buildner’s mission to foster innovative approaches to compact, energy-efficient housing that can address pressing global challenges.

This year’s edition offers a generous total prize fund of €100,000, including the Kingspan Award for designs that integrate high-performance Kingspan products and the Hapi Homes Award for a project selected for real-world construction. In addition to cash prizes, the winners gain international exposure through Buildner’s media partnerships, publications, and a dedicated MICROHOME magazine, further amplifying their ideas to the wider architectural community.

Key dates for MICROHOME 10 include the closing date for registration on 25 September 2025, the submission deadline on 29 October 2025 (11:59 p.m. London time), and the announcement of winners on 9 December 2025. These milestones ensure participants have clear timelines to develop and present their concepts, with early registration discounts available to support students and emerging designers worldwide.

MICROHOME

Design a new small-scale home concept in the 10th edition of MICROHOME — 100,000 € prize + construction

100,000 € Prize Fund / Kingpsan Edition #10 ideas COMPETITION
Prize 100,000 € + Potential realisation
Eligibility Open to all
Final registration deadline 25 September 2025

Enter an open architecture
competition now

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