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Vertical Gardens and Sustainable Timber Rise in Affordable Urban Living

Authors:
Vanessa Randolph, Akhira Ismail
Vertical Gardens and Sustainable Timber Rise in Affordable Urban Living
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With vertical gardens integrated into its facade and a heavy timber structure designed for energy efficiency, the building redefines urban living by providing affordable housing and commercial spaces in downtown Sacramento.
5 key facts about this project
01
Integrates transparent solar cells into south and east-facing windows for energy efficiency.
02
Features an internal green promenade that encourages community interaction among residents.
03
Utilizes a heavy timber moment frame system to enhance structural integrity and sustainability.
04
Adorns the building with deciduous vines for natural shading and aesthetic appeal.
05
Includes commercial storefronts like a clinic and supermarket to serve the community.

Sacramento Timber Tower is a notable building located in downtown Sacramento, designed to enhance the city’s skyline while addressing the need for affordable housing. Standing 28 floors high, this prefabricated sustainable heavy timber structure includes 250 residential units and 15 storefronts, featuring necessary services such as a clinic and supermarket. The design reflects a commitment to integrating residential, commercial, and community spaces, creating an adaptive response to urban living.

Structural System

The building's structural system consists of a heavy timber moment frame. It features two staggered wings oriented to the east and west, connected by a central core and an internal atrium. This layout encourages smooth circulation and connectivity, allowing residents to access common areas easily and promoting community interaction.

Lighting and Sustainability

Natural light is an important aspect of the design. Each southern-facing residential unit is equipped with transparent solar cells integrated into the south and east-facing windows. These solar cells harness sunlight, generating electricity for the building's mechanical systems while also providing a portion of electricity for the units. This integration supports sustainability and contributes to the overall energy efficiency of the building.

Landscaping and Community Space

The timber frame is complemented by deciduous vines that provide solar shading and help control heat gain. Additionally, green plants are carefully placed to absorb solar rays, reinforcing the building’s commitment to ecological sustainability. Vertical gardens along the building create a visual link to the Sacramento State Capitol Park, enhancing the connection between urban living and green spaces.

Internal Promenade

A significant feature of the building is the internal green promenade, designed to offer residents a comfortable and secure area for moving within the space. This path promotes leisurely walks and encourages interactions among residents. Shared spaces throughout the building further support social connections, making Sacramento Timber Tower a community hub.

The design incorporates sculpted green walls that rise up from the structure, bringing elements of nature into the atmosphere. This approach integrates landscaping with architecture, enriching the living environment and strengthening the connection to the surrounding area.

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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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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.

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Celebrating your unbuilt architecture visions with a €100,000 prize

100,000€ Prize / 2025 ideas COMPETITION
Prize 100,000 €
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