Homeowners propose two-car garage and ADU in hillside property redevelopment plan

The Tiburon Design Review Board convened on March 20, 2025, to discuss a proposed residential project that includes the addition of a two-car garage and a 1,000 square foot accessory dwelling unit (ADU) to an existing home. The meeting focused on the design elements and site considerations for the project, which aims to enhance the property while minimizing visual impact on neighboring homes.

The property owner presented plans to construct the garage above the ADU, which will be situated beneath it. This design choice was made to keep the new structures out of sight from most neighbors and to address site challenges, including steep grades. The proposed garage will be accessed via a narrow parking area, with careful attention given to maintaining unobstructed views for uphill properties.

Key features of the project include a modest expansion of the existing house to create a dining area and the potential conversion of an office space into a junior ADU in the future. The design emphasizes low-profile aesthetics, utilizing materials such as plaster and glass to complement the mid-century modern style of the existing home.

During the meeting, board members raised questions regarding the driveway's dimensions and the feasibility of maneuvering vehicles in the tight space. The property owner confirmed that the garage depth is approximately 24 feet and addressed concerns about the driveway's width and potential adjustments to accommodate better access.

The board's discussions highlighted the importance of balancing development with the preservation of views and neighborhood character. The project will undergo further review as it progresses, with additional input from the community and board members expected in future meetings.