Get inspired!

17,725 architecture projects

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

Cortensteel Cantilevers over a Meditative Space Wrapped in Timber

Author:
Mateusz Bartczak
Cortensteel Cantilevers over a Meditative Space Wrapped in Timber
Explore the full project presentation!
Subscribers only
A cantilevered top floor of cortensteel extends over a central meditative void, while the surrounding untreated pinewood cladding invites engagement with nature in this multi-level observation tower.
5 key facts about this project
01
Cantilevered design maximizes viewing angles across the landscape.
02
Perforated walls enhance natural light while providing air circulation.
03
Multi-level hammock nets promote visitor interaction and relaxation.
04
Vertical pinewood slats allow for dynamic aging and visual softness.
05
Universal access is ensured through a gentle ramp at the entrance.

Koka Bāka, meaning "wooden beacon," is a tower that stands out in its landscape. With its unique cantilevered top floor, the design allows for wide views of the surrounding area. The building invites visitors to experience nature while providing a feeling of openness. Full-height sliding doors on three sides of the upper level connect the interior with the outdoors, fostering interaction with the environment.

Structure and Materials

The tower’s framework includes 200x200mm pre-rusted cortensteel columns and beams, creating a solid base. This combination offers stability while allowing the design to reach impressive heights. Trusses support the cantilevered top floor, emphasizing both structural integrity and aesthetic appeal. Together, these elements make the tower a practical yet visually interesting structure.



Core Design and Accessibility

In the center of Koka Bāka is a void space that acts as a quiet area for visitors. Here, horizontal hammock nets provide a place to rest and reflect. The walls have many perforated openings, allowing light and air to flow inside. A gentle ramp leads to the base of the tower, making it accessible for everyone and creating a friendly atmosphere as people ascend.



Circulation and Cladding

Moving through the tower is an engaging experience thanks to the winding staircases that change direction partway up. This variation keeps the journey interesting. The outer wall serves as a railing, with additional safety features where necessary. Vertical untreated pinewood slats are used for cladding the structure. These slats are spaced to provide views while ensuring safety. As the wood ages, it helps the tower blend better into its natural surroundings.



Environmental Orientation

Koka Bāka is positioned to align with the four cardinal directions. This setup creates a connection with the landscape, and the cantilevered top appears to point toward the Kurgi farm, establishing a visual link with the open area. At night, the tower is lit in a way that highlights the base and horizontal openings. This creates a beacon-like effect, drawing attention to the structure in its setting. The interplay of light and shadow adds further depth, making the building noteworthy both day and night.

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