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Lava Formations and Grasshouses Shaping Sustainable Hospitality Experience

Authors:
Keisuke Kashimura, Tomoki Shoda, Kikyo Takeda
Lava Formations and Grasshouses Shaping Sustainable Hospitality Experience

Project in-detail

Constructed with local lava formations and inspired by traditional grasshouses, the design creates a deep connection to Iceland's volcanic landscape while providing a sustainable hospitality experience.
5 key facts about this project
01
Constructed using excavated and stacked local lava to enhance environmental integration.
02
Rooms designed with direct views of the aurora borealis for a unique nighttime experience.
03
Incorporates natural geothermal heating from the nearby Bjarnarflag power station.
04
Features a layout that encourages interaction with flowing water and communal spaces.
05
Inspired by traditional grasshouses to reflect local architectural heritage.

Hotel Gjá is located in Iceland on the Mid-Atlantic Ridge, where the earth's tectonic plates create a unique landscape. The design centers around the concept "Feeling the Earth Live," aiming to connect guests to the geological activity occurring below. The hotel serves both as a place for rest and a means to experience the natural world in a profound way.

Design Concept

The concept highlights the relationship between architecture and the surrounding volcanic landscape. Hotel Gjá is designed to enhance guests' awareness of the energy and vibrancy of the earth. The entry features a gap between rock formations, allowing visitors to step into a space that emphasizes a connection to nature. This moment prepares guests for an experience focused on the elements and the land's rhythms.

Spatial Organization

The layout encourages interaction with the landscape. Rooms are strategically placed around flowing water and shared spaces, promoting a sense of community. Each room is oriented to take advantage of natural light and views of the remarkable scenery. Guests find themselves on raised lava formations in the sleeping areas, linking the experience to the geology of the site. This physical connection reinforces their bond with the natural world.

Materiality

The design draws inspiration from traditional Icelandic grasshouses, incorporating local architectural traditions. By using excavated and stacked lava in the construction, the design addresses both structural needs and the story of the land itself. This choice demonstrates a commitment to creating a building that respects and integrates with its environment.

Sustainability and Energy Efficiency

Geothermal energy sourced from the nearby Bjarnarflag Geothermal Power Station supports the hotel's energy plan. This system provides heating to different areas while minimizing environmental impact. The incorporation of natural geothermal heat allows the design to align with sustainable practices, highlighting the relationship between the built environment and the earth.

The play of natural light is a key feature of Hotel Gjá. Large windows invite views of the aurora borealis after nightfall. Guests can witness this stunning phenomenon from inside their rooms, experiencing the magic of the northern lights first-hand. The design captures these natural elements, emphasizing the connection to the environment in a simple yet powerful way.

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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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