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Vertical Circulation and Community Spaces Enhanced by Cross Laminated Timber

Author:
Kévin Petitjean
Vertical Circulation and Community Spaces Enhanced by Cross Laminated Timber
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The use of Cross Laminated Timber defines a new approach to urban housing in San Francisco, integrating vertical circulation with community-focused spaces to effectively address local housing needs.
5 key facts about this project
01
Community spaces incorporate planters as railings to enhance urban biodiversity.
02
Centralized utilities optimize service distribution within the building.
03
Prefabricated housing modules adapt to demand and reduce construction time.
04
Vertical circulation areas enhance safety while maintaining aesthetic cohesion.
05
Rooftop garden serves as a communal area for social interaction and relaxation.

The design is located in San Francisco, a city dealing with serious housing challenges, including high rates of homelessness and a pressing demand for affordable housing. The project aims to tackle these urban issues through a modular approach that prioritizes efficiency and sustainability. The overall concept focuses on creating adaptable living spaces while fostering community connections among residents.

Materiality and Structure

The main structure uses Cross Laminated Timber (CLT) as the key building material. It is combined with concrete for the vertical circulation areas. This choice not only provides safety in the event of a fire but also supports the project’s goal of reducing environmental impact by utilizing renewable resources. The selected materials reflect a commitment to both ecological responsibility and practical design.

Community-Focused Design

The layout effectively accommodates more than 400 residents with a variety of housing options. These include ground floor studios and duplex units, ensuring diverse living arrangements for different individuals. The design emphasizes communal areas that help build social ties among residents. Planting areas around the building enhance both aesthetics and urban biodiversity, while also acting as natural barriers within the city.

Internal Organization and Amenities

Inside, the design is organized around a central landing that connects the residential units, promoting interaction among residents. Outdoor spaces are thoughtfully set back from the facade, allowing residents to enjoy their private areas while also engaging with the outside world. Shared amenities, such as a rooftop garden and a public bar, encourage social interaction and create opportunities for community engagement and cultural exchange.

Attention to Detail

Utilities are efficiently centralized in the concrete vertical circulation zones, simplifying the distribution of essential services like electricity and water. This organization enhances the building's functionality while maintaining an appealing environment. The incorporation of flexible spaces encourages various activities, enabling residents to hold community meals, partake in exercise classes, or gather for social events. The careful arrangement of these details results in a design that balances human needs with environmental considerations, emphasizing a connection between people and their surroundings.

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The Next House: USA — A Global Call to Reimagine the American Suburb

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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.

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