Get inspired!

17,725 architecture projects

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

Rainwater Garden and X Frame Structure in a Sustainable Retreat

Author:
Lily Smith
Rainwater Garden and X Frame Structure in a Sustainable Retreat
Explore the full project presentation!
Subscribers only
The integration of a rainwater garden and an X Frame structural system defines a sustainable retreat that fosters a deep connection with the natural landscape while providing a serene getaway for occupants.
5 key facts about this project
01
Rainwater garden unites the two wings of the structure for enhanced ecological integration.
02
X Frame construction promotes efficiency in both material use and structural stability.
03
FSC-certified plywood enhances sustainability while providing a warm interior aesthetic.
04
Open floor plan maximizes natural light and views, fostering a connection to the landscape.
05
Cross ventilation design ensures effective airflow, improving thermal comfort throughout the seasons.

The Butterfly Hut, located in Mangatarata, New Zealand, serves as a retreat that emphasizes a strong connection with nature and a focus on sustainability. It is designed as a cozy getaway, providing a serene environment for individuals looking to unwind. The design concept draws inspiration from the butterfly, reflected in both the form and overall function of the structure. This approach promotes a sense of simplicity and harmony while inviting occupants to engage meaningfully with the surrounding landscape.

Architectural Concept

The shape of the Butterfly Hut features a roof that mirrors the symmetry of a butterfly. This visual language enhances the overall appeal of the cabin while allowing for straightforward construction. An open floor plan is an essential aspect of the design, with the only enclosed area being the toilet. This layout fosters a continuous flow between living spaces and sleeping areas, creating an inviting and spacious interior that encourages light and air movement.

Spatial Configuration

A key element in the design is the pinch that creates a subtle transition between the living area and the sleeping quarters. This thoughtful configuration divides the space functionally without completely closing it off. The northern façade is designed to open up toward the landscape, allowing natural light to flood the interior and offering beautiful views. This connection to the outdoors is integral to the experience of the hut, providing a calm and peaceful atmosphere.

Material Selection

Materials chosen for the Butterfly Hut are sourced from local suppliers, aligning with the commitment to environmental sustainability. The structure is made using an X Frame structural wall system, complemented by FSC-certified plywood used for the internal lining. Abodo Vulcan Cladding adds to the exterior, while Colorsteel Endura roofing ensures durability. These material choices not only contribute to the aesthetic value of the cabin but also support ecological principles.

Sustainability Features

Sustainability is a central focus of the design, with several features introduced to minimize environmental impact. The Butterfly Hut incorporates systems for rainwater harvesting and greywater recycling, enhancing its functionality and ecological responsibility. Additionally, photovoltaic panels are fitted on the roof to capture solar energy, providing power to the cabin while storing excess energy for future use.

A rainwater garden connects the two wings of the cabin, serving as a focal point for occupants. It encourages reflection and creates a deeper bond with the natural environment, enhancing the overall experience of the space.

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 Next House: USA
The Next House: USA
20,000 USD Prize
The Architect's 
Chair
The Architect's Chair
Take a seat and make a statement! Edition #5
Kinderspace
Kinderspace
Architecture for Children’s Development #3
The Architect’s 
Stair
The Architect’s Stair
Take a step and make a statement! Edition #3
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
Early bird registration deadline 19 November 2025

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
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
Early bird registration deadline 19 November 2025
new
Iceland 
Slow Sauna

Design slow sauna in Iceland

project COMPETITION
Prize Monetary award
Eligibility Open to all
Early bird registration deadline 26 November 2025
Concrete 
Pavilion

Design a concrete pavilion

Edition #3 ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Final registration deadline 27 November 2025
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

Recurring architecture competitions

new
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
Early bird registration deadline 5 November 2025
The Last 
Nuclear Bomb Memorial

Design a memorial that speaks to the cause of ending all nuclear weapons programs

Edition #6 ideas COMPETITION SILENT CONTEST For this competition, NO DESCRIPTION TEXT is allowed. The architecture ideas must be communicated strictly with visuals.
Prize Monetary award
Eligibility Open to all
Final registration deadline 13 November 2025
new
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
Early bird registration deadline 20 November 2025
Hospice - 
Home for the 
Terminally ill

Design a safe and supportive space to those struggling with a terminal illness

Edition #5 ideas COMPETITION
Prize 10,000 €
Eligibility Open to all
Final registration deadline 26 November 2025
Kinderspace

Design a kindergarten of tomorrow

Architecture for Children’s Development #3 ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Final registration deadline 26 November 2025
Museum of 
Emotions

Use architecture to create different emotional states

Edition #7 ideas COMPETITION SILENT CONTEST For this competition, NO DESCRIPTION TEXT is allowed. The architecture ideas must be communicated strictly with visuals.
Prize Monetary award
Eligibility Open to all
Final registration deadline 27 November 2025
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 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
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