Get inspired!

17,725 architecture projects

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

Green Roof Sanctuary with Corten Steel Fire Pit and Stone Altar

Authors:
Matt Sterne, Renée Sterne
Green Roof Sanctuary with Corten Steel Fire Pit and Stone Altar
Explore the full project presentation!
Subscribers only
A green roof envelops a meditation space, enhanced by a corten steel fire pit and a carved stone altar, creating a tranquil environment for reflection amidst the natural landscape of New Zealand.
5 key facts about this project
01
A circular floor plan divided into six equal segments enhances spatial organization for meditation.
02
A green roof integrates with the surrounding landscape while providing thermal insulation.
03
Natural light is maximized through wrap-around glazing and strategically placed windows.
04
Locally sourced Hinuera Ahi Natural sandstone forms the carved flower processing altar.
05
A corten steel bioethanol fire pit creates a focal point for warmth and gathering within the space.

The Tiwai meditation space is a carefully designed structure set against the quiet backdrop of New Zealand's landscapes. It serves as a place for reflection and mindfulness, drawing inspiration from the concept of a tree trunk. This idea symbolizes a connection between the earth and the sky, representing stability and nourishment. The design aims to engage individuals with nature, creating an environment that supports meditation.

Conceptual Framework

The building features a circular floor plan, measuring six meters in diameter, divided into six equal segments. This layout accommodates five individuals while incorporating an entry space that showcases a semi-circular carved stone flower processing altar. Each segment is further divided, resulting in eighteen distinct areas that provide unobstructed views through central windows. This arrangement connects the interior with the surrounding landscape.

Spatial Arrangement and Light

A hallmark of the design is the wrap-around glazing that allows light to enter freely, enhancing the interior atmosphere. Organic curtains, neatly tucked into a negative ceiling detail, add visual softness and provide shading when needed. This thoughtful aspect ensures that the presence of nature is felt throughout the space, regardless of the weather, offering a consistent retreat for meditation.

Environmental Integration

The green roof adds another layer to the Tiwai design, as it features foliage that softly spills over the structure. This element creates a gentle transition of light and shadow within the space, offering an evolving experience throughout the day. The green roof contributes to effective insulation and reduces noise from rain, helping to create a calm and tranquil environment for those inside.

Material Selection

Materials play a significant role in the design, with Hinuera Ahi Natural sandstone used for the flower processing altar and corten steel for the bioethanol fire pit at the center. These choices enhance the aesthetic appeal while aligning with sustainable practices and local sourcing.

The combination of natural light, thoughtful shading, and carefully chosen materials creates a meditation space that encourages deep reflection. It invites individuals to enjoy their surroundings while grounding them in the peaceful context of New Zealand.

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

Enter an open architecture
competition now

The Architect’s 
Stair
The Architect’s Stair
Take a step and make a statement! Edition #3
Kinderspace
Kinderspace
Architecture for Children’s Development #3
Buildner's Unbuilt Award 2025
Buildner's Unbuilt Award 2025
100,000€ Prize / 2025
The Home of 
Shadows
The Home of Shadows
The light studies. Edition #4
The Architect's 
Chair
The Architect's Chair
Take a seat and make a statement! Edition #5

The Buildner’s Unbuilt Award 2025: Celebrating Architectural Creativity and Visionary Unbuilt Designs with a Total Prize Fund of €100,000

`
Competition organisers

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.

Buildner's Unbuilt Award 2025

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

100,000€ Prize / 2025 ideas COMPETITION
Prize 100,000 €
Eligibility Open to all
Final registration deadline 30 October 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
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 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
Early bird registration deadline 15 October 2025
Kinderspace

Design a kindergarten of tomorrow

Architecture for Children’s Development #3 ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Advance registration deadline 16 October 2025
Buildner's Unbuilt Award 2025

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

100,000€ Prize / 2025 ideas COMPETITION
Prize 100,000 €
Eligibility Open to all
Final registration deadline 30 October 2025
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
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

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