Neighbors oppose new building expansion at Twentieth Street due to privacy concerns

The San Francisco Planning Commission convened on July 4, 2025, to discuss a contentious discretionary review regarding a proposed three-story addition to a residential property at 2020 Hyphen 010586DRP Hyphen 021485 Twentieth Street. The project aims to add two accessory dwelling units to an existing two-family residence, which is classified as a historic resource built in 1923.

David Winslow, the staff architect, presented the project, highlighting that it complies with the city’s planning code and residential design guidelines. However, local residents Richard Viola and Brianna Gun, who live adjacent to the proposed site, voiced strong opposition. They argued that the addition would infringe on their privacy and light, effectively "boxing them in" and obstructing access to shared mid-block green space.

The neighbors proposed an alternative plan that would expand the building vertically rather than horizontally, which they believe would mitigate the negative impacts on their properties. They also noted that a petition with seven signatures opposing the project had been submitted, alongside one letter of support.

During the meeting, the neighbors emphasized that the irregular lot configuration of their properties exacerbates the potential adverse effects of the proposed construction. They referenced a similar project from 1982 that was rejected by the commission for similar reasons, arguing that the current proposal fails to respect the established residential design guidelines aimed at preserving light and air for adjacent properties.

In contrast, the project sponsor, represented by attorney Denise Ledbetter, defended the proposal as compliant with city regulations and necessary for increasing housing density in line with state laws. Ledbetter argued that the concerns raised by the neighbors were subjective and did not constitute exceptional circumstances that would warrant blocking the project.

The commission is expected to deliberate further on the matter, weighing the residents' concerns against the city's housing goals and the project's compliance with existing regulations. The outcome of this review could set a precedent for future developments in the area, particularly regarding the balance between historic preservation and the need for increased housing density.