This competition is part of a strategic partnership between Buildner and ArchDaily that aims to explore "The Contemporary Home".

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Introduction

COMPETITION ORGANISERS
Underbridge #2

As cities expand, vertical and horizontal spaces are continually redefined, adapting to the pressing demands of urban living. Yet, beneath the expanse of our infrastructure lies a matrix of underutilized spaces, often overshadowed by their towering counterparts - the bridges that stitch our cities together. These underbridge spaces, ranging from small niches to vast expanses, remain dormant, echoing the hum of the traffic above, waiting for visionaries to tap into their latent potential.

In our relentless pursuit to address urban housing needs, Buildner is proud to unveil its 20th competition in the Affordable Housing Series, marking another milestone in the exploration of innovative living solutions. This edition also represents the second edition of Underbridge, our housing challenge focused on the overlooked and underexplored spaces beneath bridges around the world. Through this challenge, architects and visionaries are invited to reimagine these environments and unlock their potential — transforming them into dynamic, thriving communities that resonate with the city’s heartbeat. 

Beneath city bridges worldwide lies untapped potential, vast spaces brimming with opportunity. Underbridge invites visionaries to transform these areas into thriving communities. Buildner is searching for designs that can cater to a wide array of residents, ensuring a perfect blend of scalability, affordability and eco-consciousness. It is an invitation to revolutionize these overlooked spaces with a fresh, practical perspective.

Participants have the liberty to pinpoint any underbridge site across the globe for their visionary designs. Essential considerations include the site’s accessibility, available amenities, and how the proposed solution harmonizes with the existing community. The designs should showcase adaptability, ensuring they cater to various needs while remaining both cost-effective and sustainable.

With this challenge, the boundaries are set by your own creativity. Buildner urges entrants to think big, think different, and present housing solutions that challenge the norm. The underbridge spaces await your transformative touch. Let your imaginations run wild, and let’s craft a vision where these spaces become the heartbeat of urban communities.

Download the full competition brief for more information!  

Competition is open to all. No professional qualification is required. Design proposals can be developed individually or by teams (4 team members maximum). Correspondence with organizers must be conducted in English; All information submitted by participants must be in English.

Brief

The competition brief is available for download at any time in the following language: English, Italian, French and Spanish.

FULL COMPETITION BRIEF [ENG][IT][FR][ES]

Download brief

Prizes

Prize fund

8,000 €

1ST PLACE

4,000 €

2ND PLACE

2,000 €

3RD PLACE

1,000 €

Buildner Student Award

1,000 €

(more details)

6 Honorable mentions & certificates

Buildner will acknowledge the outstanding performance of all winners and honourable mentions with Certificates of Achievement.

Publicity campaign

Buildner's publicity campaign offers extensive exposure to the architectural community, ensuring that the results of the competition are seen by a vast audience:

Buildner's two million

The results are published on buildner.com, a leading website in the architecture industry, attracting over one million unique visitors annually. Additionally, the campaign extends to Buildner's social networks, which boast over 800,000 followers combined, and through newsletter campaigns reaching over 200,000 subscribers.

Interview and movie

Winners will have the opportunity to submit a movie and an interview, boosting their recognizability and helping to build their name in the industry.

Extensive media network

Buildner leverages an extensive network of media industry leaders to publish the competition results. This broadens the audience further, ensuring that participants' work is showcased across multiple platforms known for their influence and reach in the architecture and design sectors.

Publicity

ArchDaily feature

As part of the collaboration between Buildner and ArchDaily, the competition winners will be showcased on ArchDaily, a leading architecture news platform.

This feature will greatly boost the winners' visibility to millions of architecture professionals and enthusiasts worldwide, increasing their chances for new opportunities, attracting new clients, and establishing their reputation in the industry.

Read more about Buildner and ArchDaily partnership
&

Jury

Jury members shall under no circumstances be contacted by competition participants or their representatives. Participants who attempt to contact jury members, shall be disqualified.

All jury members are involved in the evaluation based on their availability at that time. All communication regarding the competition should only be carried out with Buildner staff. For any questions please contact us on [email protected]

Luciana de la Garza Arregui

Estudio Atemporal

Mexico

Maya Bird-Murphy

Mobile Makers

United States

Đoàn Thanh Hà

H&P Architects

Vietnam

Jenchieh Hung

HAS design and research

Thailand

Rajeev Kathpalia

Vāstu Shilpā Sangath

India

Kulthida Songkittipakdee

HAS design and research

Thailand

Elke Sterling-Presser

Co Founder and Director, Sterling Presser Architects and Engineers

Germany

Nicolas Sterling

Co Founder and Director, Sterling Presser Architects and Engineers

Germany

Zehua Zhang

KPF

United States

Ask questions to the jury panel directly!

This option is available to registered participants only.

If you are registered, please access your upload panel and look for the
Jury Questions & Answers section.

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specific jury member
Ask questions about

The brief

Interpretation and intent of the competition brief

Your task

Key themes, priorities, or values considered during evaluation

Design help

General design approach or conceptual direction

Personal design assessment

Request an in-depth design assessment of your project after results are announced.

The design assessment highlights each project’s strengths and areas for improvement, giving participants valuable insight into their work. It helps them better understand their submission, compare it to other entries, and identify opportunities for growth in future projects.

Key dates

Send reminders

Registration fees

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140 €

120 €

140 €

120 €

+4.5% VAT

 

STUDENT REGISTRATION REQUIREMENTS


Contact us to receive special student rates for group registrations (discount applies for 3+ registrations from one university/school) and to receive further information and support for getting your students involved in architecture competitions. Send us request from your university email address along with basic information about yourself and your university/school. Please note that only recognized university staff can apply for the reduced student rate.

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Architecture competitions newsletter

Ask questions to the jury panel directly!

This option is available to registered participants only.

If you are registered, please access your upload panel and look for the
Jury Questions & Answers section.

Ask to all.
One collective jury answer
Ask a
specific jury member
Ask questions about

The brief

Interpretation and intent of the competition brief

Your task

Key themes, priorities, or values considered during evaluation

Design help

General design approach or conceptual direction

Absolutely not! You’ll always keep full ownership and authorship of your project. Submitting to a Buildner competition doesn’t mean giving up your rights — it simply gives us permission to share and promote your work as part of the competition. We may feature your project on our website, social media, newsletters, books, or exhibitions — all to celebrate your creativity and inspire others. This permission helps us give your work the visibility it deserves, without needing to ask you each time we publish it.
Click on "register now", fill in all the required fields, choose your payment method and submit your information. You will be forwarded to Paypal or CPS secure payment gateway, to cover the competition fee. Once we receive your payment, we'll send you an email with your username and password to upload your submission directly to the website.
You can add/remove/edit team member information as often as you want in the upload panel, up until the submission deadline.
Yes we are in the process of negotiating with multiple international industry-related media representatives. The list of media partners is constantly updated on our website, please check it regularly to find latest updates.
Yes. If the jury panel selects a Student award's submission for the top 3, it will automatically be awarded both prizes.
No. Competition entries are evaluated anonymously. The participant registration type is only revealed upon the announcement of the results.
Please contact us – [email protected] and we will address the problem directly.
The short answer is yes, you may submit a previously published design concept as long as you are the author. Before re-submitting your project, please carefully read the following clarification points listed here - architecturecompetitions.com/resubmit-your-design
As AI-generated images may be based on pre-existing work or generated using proprietary algorithms, it is best to check the specific terms and conditions of the AI tool used to generate the image to determine its ownership status. It may also be necessary to seek legal advice to fully understand the ownership rights and any restrictions that may apply. In general, it is not recommended to consider AI-generated images as your sole work or intellectual property unless you have obtained explicit permission to do so.
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Architecture competitions are a great way to explore subjects we are passionate about, continue developing our creativity and enjoy working on ideas that we might not have the opportunity to address in everyday practice. They are also an excellent way to keep practicing, experimenting, and improving as designers.

From our point of view, architecture competitions are an opportunity to step outside the routines of everyday practice and explore ideas with greater freedom. They encourage experimentation, challenge us to test our own design approach, and allow us to engage with places, cultures, and architectural questions that we might not encounter in our daily work. The Iceland Slow Sauna competition was particularly appealing because of its unique setting and intimate scale, inviting a thoughtful response to both landscape and atmosphere. Competitions also provide a valuable space for collaboration. As this is our first competition as a team, it allowed us to develop ideas together, combine our individual perspectives, and discover how we complement each other throughout the design process. At the same time, competing alongside participants from around the world motivates us to continuously improve and learn from different ways of thinking about architecture. Regardless of the outcome, we believe every competition is worthwhile. Each project strengthens our design process, sharpens our ability to communicate ideas, and teaches us something new about architecture and ourselves. Every challenge becomes another step in our professional development, giving us greater confidence and a deeper understanding that we can carry into future projects. We see competitions as an essential part of our growth as architects and hope to continue participating regularly in the years to come.

For me, architecture competitions are more than a way to win projects. They are opportunities to challenge my own limits, refine my thinking, and continuously develop as an architect. Competitions are also an open platform for engaging with society, cities, the media, and the public through architecture. They allow us to respond to contemporary issues, communicate ideas, and explore new possibilities for architecture and the public realm.

HONORABLE MENTION
Competition Iceland Slow Sauna

Competitions allow us to continue an ongoing design dialogue beyond the constraints of commercial practice. They provide a space to experiment, test ideas and develop our own architectural voice. While recognition is rewarding, the process of exploring a clear idea from brief to proposal is what we value most.

One of the reasons I enjoy architecture competitions is that they allow me to explore ideas that don't always fit within everyday practice. They allow designers to work with greater freedom, respond to unfamiliar contexts, and place their ideas within an international architectural conversation. The Iceland Slow Sauna competition was especially interesting because the program was small, but it involved many different elements: heat, water, vegetation, weather, privacy, and landscape. Receiving an Honorable Mention was very encouraging, but I also valued the design process itself. It gave us the chance to think carefully about how such a small building could still create a rich spatial experience.

I participate in architecture competitions to be able to explore topics or develop skills that I am not currently otherwise working on.

HONORABLE MENTION
Competition Iceland Slow Sauna

Architecture competitions give designers the freedom to explore new building types, challenge conventions, and test ideas that may not be possible within the constraints of commercial projects. They create opportunities to experiment with new concepts, materials, and ways of thinking, pushing both the designer and the discipline forward.

SUSTAINABILITY AWARD
Competition Iceland Slow Sauna

We participate in architecture competitions because they offer a space for experimentation, research and reflection, beyond the constraints of a conventional commission. They allow us to test ideas, question our methods and develop architectural proposals with a strong conceptual and material focus. This competition is particularly meaningful to us because it deals with micro-architecture and the program of the sauna, two subjects that strongly resonate with our practice. We are interested in small-scale architectures where every decision becomes essential: the relationship to the site, the use of materials, the construction process, the atmosphere, and the experience of the body in space. The sauna is a program that we find especially rich, as it connects architecture to ritual, climate, materiality and sensory experience. It is a place where heat, light, texture, intimacy and landscape can come together in a very direct way. For us, this type of project is an opportunity to explore architecture at a concentrated scale, where simplicity, precision and sensitivity are fundamental.

Architecture competitions are an opportunity to collaborate, conduct research, and contribute to architectural discourse. They allow architects to explore questions that may not emerge within conventional commissions and to develop ideas that push beyond established norms. Often, speculative and unbuilt proposals become a means of revisiting, refining, and expanding upon ideas that emerge from longstanding interests and research. Even when a proposal is not realised, the concepts developed through competitions can continue to evolve, generate conversation, or find their way back into projects down the line.

We decided to participate in this architecture competition as an opportunity to challenge ourselves, think freely, and grow as future architects. As we approach graduation, it felt like the right moment to apply what we have learned in a real design context, explore ideas beyond the academic framework, and begin sharing our work with the architectural community.

Celebrate your idea. Register today!