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Reclaimed Materials Transforming Under-Highway Community Living

Authors:
Monica Lamela Blazquez, Sofia Betancur Velasquez
Reclaimed Materials Transforming Under-Highway Community Living
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Reclaimed materials create a network of living spheres beneath the interstate, offering permanent housing for vulnerable populations while integrating community life into the urban landscape.
5 key facts about this project
01
Reclaimed urban spaces beneath highways create new living environments.
02
Infrastructural walls are constructed from recycled materials, enhancing sustainability.
03
Flexible living spheres accommodate diverse resident needs and foster community.
04
Plug-in rooms allow for personalization of minimal living spaces.
05
Designed to integrate seamlessly with surrounding neighborhoods, promoting coexistence.

Home Sweet Home is an initiative designed to tackle the housing crisis in San Francisco, a city grappling with high living costs and growing social inequality. The focus is on transforming underused areas beneath interstate highways 80 and 280 into permanent homes. This approach aims to integrate marginalized populations back into the urban landscape while creating sustainable living spaces. The project envisions a community-oriented environment that not only provides housing but also fosters social connection.

Living Spheres

The design incorporates several living spheres that represent different aspects of home life. The first sphere, "Being," focuses on individual needs by offering flexible spaces that residents can adapt to their preferences. Following this, the "Caring" sphere addresses family dynamics, fostering support and collaboration within households. The "Sharing" sphere promotes collective living, encouraging resource sharing among residents to enhance community ties. The last two spheres, "Coliving" and "Coexisting," encourage broader community engagement and help integrate the new development with its surrounding neighborhoods.

Sustainability and Materials

A significant element of Home Sweet Home is its dedication to sustainability through the use of recycled materials. By taking advantage of construction waste from the Bay Area, the project emphasizes a circular economy. Infrastructural walls are constructed as service spaces, housing essential domestic needs while utilizing recycled materials from old skyscrapers. This careful selection challenges the norm of waste in construction and offers an environmentally responsible solution.

Community Engagement

Active community engagement is central to the design. Programmatic platforms create shared living areas that facilitate interaction among residents, enhancing the communal experience. Plug-in rooms serve as individual living spaces that can be customized, giving residents the opportunity to establish their identity within the community. This focus on adaptability allows for a diverse range of needs and encourages meaningful involvement in shaping living environments.

The arrangement of public and private spaces within Home Sweet Home invites residents to engage with their surroundings. This active participation in community life builds a sense of belonging, reinforcing the value of social connections in urban settings. Each aspect of the design works harmoniously to create a welcoming atmosphere, helping to address the complexities of urban living in San Francisco.

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

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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

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