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Green Roofs and Semi-Underground Design in a Community-Integrated Sauna

Authors:
Jingyi Zhan, Xvefen Hu, Hang Yin
Green Roofs and Semi-Underground Design in a Community-Integrated Sauna

Project in-detail

The semi-underground structure, topped with green roofs and designed around a culturally significant sauna, integrates seamlessly into its Latvian landscape while providing a unique residential experience.
5 key facts about this project
01
The design incorporates a semi-underground layout to enhance energy efficiency.
02
Green roofs support local biodiversity and blend the building with its natural surroundings.
03
Culturally significant sauna features encourage traditional practices, enhancing local lifestyle.
04
Functional zoning is informed by prevailing wind patterns, optimizing outdoor usability.
05
Dual entrances on different levels improve accessibility and flow throughout the residence.

The architectural design titled “Disappeared Buildings” is located in Latvia and aims to create living spaces that closely interact with the surrounding landscape. The project is built around the concept of "hidden limitation," which means that the design integrates with nature rather than overpowering it. By focusing on sustainability, the architecture strives to preserve the environment while offering comfortable and functional spaces for residents.

Site Challenges and Analysis

The site covers an area of 23,560 m², but the available building footprint is only about 100 m². This challenge creates opportunities to incorporate thoughtful landscape design while ensuring that most of the site remains natural. The local weather conditions are also important, particularly the wind direction, which affects how outdoor spaces, such as those for barbecues, are arranged. By taking these factors into account, the design promotes enjoyable outdoor experiences throughout the year.

Architectural Style and Functionality

The building features a narrow base that runs east to west, which adds complexity to the planning of roads and surrounding landscape. Two entrances at different levels improve access and encourage movement through the space. A mix of horizontal and vertical designs creates distinct functional areas while maintaining overall connectivity. Local traditions influence the architecture, evident in the design of a sauna that promotes traditional customs, such as jumping into water, enhancing the connections to local culture.

Landscape Integration and Sustainable Practices

The project employs a semi-underground construction approach. This method not only improves energy efficiency but also helps the building blend into its natural surroundings. Green roofs are part of the design, supporting local plant life while helping to regulate temperature. The layout is carefully aligned with the adjacent riverbank, establishing a direct relationship between the structure and the landscape.

Invisible boundaries throughout the site allow for fluid transitions between various areas. This design choice ensures privacy while also fostering community interactions. Thoughtful planning emphasizes a deep respect for nature and creates spaces that encourage residents to engage with their environment, resulting in a blend of functionality and comfort.

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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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