Get inspired!

17,725 architecture projects

Learn from past Buildner architecture competition participants through our extensive project library, curated over more than 15 years!

Lava Stone Retreat with Subterranean Guestrooms and Geothermal Wellness

Author:
Masakaze Nishida
Lava Stone Retreat with Subterranean Guestrooms and Geothermal Wellness
Explore the full project presentation!
Subscribers only
Set against the backdrop of Hverfjall Volcano, this retreat utilizes lava stone construction and geothermal energy to create subterranean guestrooms and wellness spaces dedicated to relaxation.
5 key facts about this project
01
The retreat is 1.5 meters below ground level, enhancing the connection to the earth.
02
Lava stone walls provide a natural aesthetic and thermal mass for energy efficiency.
03
Geothermal energy is utilized for heating pools and guest rooms via cascade utilization.
04
An unobstructed view of the Aurora Borealis is available from common areas.
05
Water features reflect the surrounding landscape, integrating visual and sensory experiences.

The project rises from the unique geological features of Iceland, located above the Mid-Atlantic Ridge, an area known for its rich geothermal activity. It aims to make use of geothermal energy, which has played a significant role in Icelandic culture since the time of the first settlers who relied on natural hot springs for cooking and bathing. With a focus on sustainability, the facility combines guest accommodations, wellness features, and communal spaces, all while embracing the surrounding landscape.

Geothermal Utilization

The design incorporates principles of cascade utilization, allowing geothermal energy to serve several functions simultaneously. Hot water extracted from the earth is used not just for heating guest rooms but also for warming pools and supporting agricultural activities. This multi-use approach underscores a commitment to environmental responsibility and provides a framework for future developments in similar geothermal regions.

Spatial Configuration

Guest rooms are placed in the basement, set 1.5 meters below ground level. This choice creates an environment that feels safe and serene. The lava stone walls enhance this experience, echoing the textures of the Icelandic landscape outdoors. They connect the occupants to the earth and highlight the natural features that define the region.

Natural Integration

The eastern facade features large openings that bring in natural light and views of the sky. This design invites the outside in and creates opportunities for observation and reflection. The water surface extends towards Hverfjall Volcano, linking the building visually to its natural surroundings and blurring the lines between man-made and natural elements.

Communal Spaces

Attention to communal areas is evident throughout the design. These spaces facilitate social interaction among guests while also providing quiet areas for relaxation. The layout promotes a peaceful atmosphere, aligning with the tranquil qualities found in Iceland's landscapes.

The play of light and the presence of water throughout the facility create a calming environment. Visitors are drawn into an experience that connects them to both the geothermal heritage and the stunning natural beauty of Iceland.

Noticed a mistake?
Highlight the text and click on
Noticed a mistake

Enter an open architecture
competition now

The Home of 
Shadows
The Home of Shadows
The light studies. Edition #4
The Architect’s 
Stair
The Architect’s Stair
Take a step and make a statement! Edition #3
The Architect's 
Chair
The Architect's Chair
Take a seat and make a statement! Edition #5
MICROHOME 2026
MICROHOME 2026
100,000 € Prize Fund / Kingpsan Edition #11
The Next House: USA
The Next House: USA
20,000 USD Prize
Buildner's Unbuilt Award 2026
Buildner's Unbuilt Award 2026
100,000€ Prize / 2026

The Next House: USA — A Global Call to Reimagine the American Suburb

`
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.

The Next House: USA

Design the next suburban home for the USA

20,000 USD Prize ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Advance registration deadline 18 February 2026

Open architecture competitions

  • Closest deadline first
  • Project competitions first
    Selected winning projects have the potential to be constructed
  • Ideas competitions
    Experimental competitions with the focus on pushing the boundaries of creativity
new
Rome 
Rain Rooms

Design a rain room for Rome

ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Early bird registration deadline 14 January 2026
new
Pavilion Atlas 2026

Design a story of your country

ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Early bird registration deadline 21 January 2026
Iceland 
Slow Sauna

Design slow sauna in Iceland

project COMPETITION
Prize Monetary award
Eligibility Open to all
Advance registration deadline 28 January 2026
The Next House: USA

Design the next suburban home for the USA

20,000 USD Prize ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Advance registration deadline 18 February 2026

Recurring architecture competitions

Re:Form - 
New Life 
for Old Spaces

Choose a site—used, abandoned, or forgotten—anywhere in the world, and give it a new purpose

Edition #2 ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Advance registration deadline 3 December 2025
The Home of 
Shadows

Design a home with no artificial lighting

The light studies. Edition #4 ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Advance registration deadline 14 January 2026
The Architect’s 
Stair

Take a step and make a statement!

Take a step and make a statement! Edition #3 ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Advance registration deadline 15 January 2026
The Architect's 
Chair

Take a seat and make a statement!

Take a seat and make a statement! Edition #5 ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Advance registration deadline 22 January 2026
new
MICROHOME 2026

Design a new concept of small-scale home and share a prize fund of 100,000€

100,000 € Prize Fund / Kingpsan Edition #11 ideas COMPETITION
Prize 100,000 €
Eligibility Open to all
Early bird registration deadline 11 February 2026
new
Buildner's Unbuilt Award 2026

Celebrating your unbuilt architecture visions with a €100,000 prize

100,000€ Prize / 2026 ideas COMPETITION
Prize 100,000 €
Eligibility Open to all
Early bird registration deadline 26 February 2026

Media, partners and clients

To view this project in detail,
please log in with your
Architects’ Network Plus account.
Subscription instantly unlocks all the architecture projects plus other member-only benefits:
  • Access the 17,725 Concept Library
  • Professional tools including file transfer, email, portfolio management, and more
Register now
Already a member? Log in

This website uses cookies to improve user experience and gather usage statistics.

More information is available in our Privacy & Cookie policy