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Geothermal Greenhouse Featuring High-Performance Glass and Mass Timber Construction

Authors:
Miguel Rodrigues, Hávarður Olsen
Geothermal Greenhouse Featuring High-Performance Glass and Mass Timber Construction
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A geothermal greenhouse constructed with high-performance glass and mass timber facilitates sustainable agriculture while providing an engaging dining experience rooted in local cuisine.
5 key facts about this project
01
Utilizes high-performance glass to maximize natural light and enhance plant growth.
02
Incorporates geothermal energy systems for efficient heating and cooling.
03
Features mass timber construction for structural integrity and sustainability.
04
Adopts a bent A-frame design to optimize space and aesthetic appeal.
05
Implements a rainwater harvesting system to support irrigation needs.

Gróðurhús is an architectural project that innovatively reinterprets the concept of a greenhouse by integrating culinary experiences with sustainable design. Located near Myvatn Nature Baths in rural Iceland, the project serves as a multifunctional venue where the principles of agriculture, environmental consciousness, and community engagement converge. Its architectural layout accommodates both plants and people, providing a setting for education and dining.

The design includes two main structures: the greenhouse, which functions as both a cultivation area and a dining space, and a secondary building that supports kitchen and operational requirements. The project adopts a dual approach, emphasizing transparency in the greenhouse to showcase plant growth while incorporating more solid elements for service areas, thus balancing visibility with functionality.

Unique Design Approaches

Gróðurhús distinguishes itself through its focus on sustainable architectural practices and community integration. Key design elements include the extensive use of high-performance glass, allowing maximum natural light to facilitate plant growth while creating an inviting environment for diners. The structure captures geothermal heat, harnessing local resources to reduce energy consumption significantly. Passive ventilation and rainwater harvesting systems further enhance the building's sustainability profile, demonstrating a commitment to environmentally responsible design.

The layout is intentionally arranged to promote interaction and education. The greenhouse dining area offers a vibrant atmosphere where visitors can experience locally sourced meals amidst the growing plants, fostering a direct connection between food production and consumption. The multipurpose hall allows for diverse activities, ensuring the space serves various community functions, from workshops to social gatherings, enhancing the project’s role within the locality.

Architectural Details

The architectural design includes strategic zoning that separates public and private functions while allowing for an intuitive flow throughout the space. The greenhouse area, measuring 723 square meters, is where the majority of interaction occurs, supported by a well-equipped kitchen and spacious multipurpose hall of 111 square meters dedicated to community events.

The use of wood as a primary structural material infuses warmth into the design while simultaneously connecting the building to its natural surroundings. Additionally, innovative roof profiles are employed to maximize natural light and improve energy efficiency, thus minimizing material usage—a sustainable approach that aligns with modern architectural principles.

Visitors interested in a deeper understanding of Gróðurhús are encouraged to explore the architectural plans, sections, and designs available in the project presentation. These resources provide further insights into the architectural ideas and technical specifications that define this notable greenhouse project.

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The Buildner’s Unbuilt Award 2025 is an international architecture competition dedicated to recognizing and celebrating the value of unrealized architectural designs. It invites architects, designers, and students worldwide to submit visionary projects that have not yet been constructed, highlighting the power of ideas and the creativity behind the design process. By focusing on unbuilt work, the competition aims to bring forward concepts that shape the future of architecture and push the boundaries of the profession. 

Participants can compete in three categories based on project scale: Small Wonders (up to 100 m²), Medium Marvels (101–999 m²), and Large Visions (over 1,000 m²). Each category winner will receive €20,000, and additional prizes include honorable mentions, student awards, and a special Best Presentation Award. Winning projects will gain significant international exposure through Buildner’s publicity campaign and a feature article on ArchDaily, providing a unique opportunity to showcase creative ideas to a global audience. 

The Buildner’s Unbuilt Award 2025 encourages entrants to submit any type of unbuilt project, from conceptual visions to detailed designs, celebrating bold innovation without the constraints of realization. Important deadlines: registration closes on October 30, 2025; submissions are due by November 20, 2025; winners will be announced on December 17, 2025.

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