Get inspired!

17,725 architecture projects

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

Warm Concrete Beams Supporting Green Urban Gardens in Rotterdam

Author:
Bastiaan Muilwijk
Warm Concrete Beams Supporting Green Urban Gardens in Rotterdam
Explore the full project presentation!
Subscribers only
Warm concrete beams support an array of vegetable and fruit gardens, creating a unique integration of urban agriculture within office spaces in Rotterdam.
5 key facts about this project
01
Integrated 50,000 m² of vegetable and fruit gardens into office design.
02
Occupies only 20% of the site, creating expansive green space.
03
Operable windows enhance natural ventilation and air quality.
04
Features two-level warm concrete beams for structural support.
05
Rainwater management system sustains the garden resources.

The Sandwich project is located in the Katendrecht district of Rotterdam and focuses on merging office spaces with the vegetable and fruit industry in the Netherlands. In response to climate change and increasing building density, the design addresses the need for innovative agricultural practices. It integrates 50,000 m² of vegetable and fruit gardens into its structure, fostering a connection between urban life and agricultural activities.

Conceptual Framework

The project occupies only 20% of the site, creating an 8,000 m² entrance garden that enriches the surrounding area. This garden acts as a transition zone, linking the building and natural surroundings. Transparency is a key element of the design, allowing sunlight to illuminate the interior while providing optimal conditions for the gardens.

Spatial Organization

The layout encourages easy navigation and interaction with the green spaces, fostering a lively atmosphere for users. Operable windows are strategically placed to ensure natural ventilation, improving air quality and comfort. This focus on environmental factors underscores the potential of architecture to enhance well-being through its relationship with nature.

Structural Integrity

The building’s structure consists of two-level concrete beams designed to support the various functions within. The use of “warm concrete” is intended to provide comfort in changing weather conditions. Additional reinforcement is applied to high-pressure areas, especially where circulation occurs, ensuring safety and practical movement throughout the space.

Water Management

A smart water management system is integrated, directing rainwater to the gardens. This design choice underlines the commitment to sustainability and responsible resource management in an urban setting. The gardens not only thrive but also contribute to the local ecosystem.

The entrance garden showcases a mix of plant species, creating a vibrant atmosphere that highlights biodiversity. It enhances the visual appeal and offers a welcoming environment for both visitors and occupants.

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

Enter an open architecture
competition now

Pavilion Atlas 2026: Rethinking Nations Through Architectural Storytelling

`
Competition organisers

Buildner launches Pavilion Atlas 2026, a global architecture competition inviting designers to create conceptual pavilions that tell the story of a country. Participants are challenged to express cultural, social, environmental, or political identity through spatial storytelling, focusing on ideas rather than symbols or technical constraints. The competition offers a total prize fund of €20,000, with final registration open until September 16, 2026, and winners to be announced on December 8, 2026. All submissions will become part of a global design archive.

Pavilion Atlas 2026

Design a story of your country

ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Final registration deadline 16 September 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
The Oak 
Moon 
Pavilion

Design a yoga pavilion in Italy

project COMPETITION
Prize Monetary award
Eligibility Open to all
Early bird registration deadline 27 August 2026
Vancouver 
Tall Challenge

Design the future of Vancouver’s skyline

Building higher downtown ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Advance registration deadline 9 September 2026
Pavilion Atlas 2026

Design a story of your country

ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Final registration deadline 16 September 2026
Portugal Long Table 
Restaurant

Design a slow-living restaurant in Portugal

project COMPETITION
Prize Monetary award
Eligibility Open to all
Advance registration deadline 23 September 2026
New York High Falls 
Riverfront Market

Design a New Riverfront Market in Rochester, New York

ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Advance registration deadline 7 October 2026
Valli Wine 
Tasting Room

Design a wine tasting room in Italy

project COMPETITION
Prize Monetary award
Eligibility Open to all
Advance registration deadline 8 October 2026
The 
Quiet 
Tower

Design an observation tower in Latvia

project COMPETITION
Prize Monetary award
Eligibility Open to all
Advance registration deadline 15 October 2026

Recurring architecture competitions

Kinderspace

Design a kindergarten of tomorrow

Architecture for Children’s Development #4 ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Advance registration deadline 27 August 2026
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 #3 ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Final registration deadline 10 September 2026
new
Museum of 
Emotions

Use architecture to create different emotional states

Edition #9 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
Early bird registration deadline 10 September 2026
Underbridge #2

Design housing in underutilized bridge spaces

Affordable Housing Edition #20 ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Final registration deadline 17 September 2026
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
Final registration deadline 23 September 2026
The 
Architect's 
Chair

Take a seat and make a statement!

Stockholm Furniture Fair Edition #6 ideas COMPETITION
Prize Monetary award + Exhibition at Stockholm Furniture Fair
Eligibility Open to all
Advance registration deadline 24 September 2026
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
Final registration deadline 30 September 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