Boston Properties plans significant Fourth and Harrison project including affordable housing

The San Francisco City Planning Commission convened on July 4, 2025, to discuss significant developments in the Central SoMa area, focusing on a large project authorization and associated entitlements for a mixed-use building project at Fourth and Harrison Streets.

The meeting began with a presentation outlining the project's scope, which includes the demolition of six existing buildings and the construction of a new 14-story, 185-foot tall mixed-use structure. The project aims to provide 144 units of affordable housing, with a dedicated 15,000 square feet of land set aside for this purpose. Notably, the project no longer requires a variance for permitted obstructions, streamlining the approval process.

The project has evolved since its initial approval in December 2019, when the Planning Commission granted phase 1 office development authorization. The revised proposal now incorporates an additional 46,000 square feet, bringing the total to 981,000 square feet, which includes 810,000 square feet of office space. The revisions seek modifications to two previously granted exceptions related to building setbacks and mass reduction, which are deemed minor and consistent with the original design.

A key aspect of the discussion involved the conditional use authorization to demolish three unauthorized dwelling units (UDUs) located in a commercial building at 759 Harrison Street. The project sponsor, Boston Properties, reported that the tenants of these units have vacated the premises, and the relocation was supported by the project sponsor. The analysis indicated that legalizing the UDUs was not financially feasible, leading to the decision to demolish.

Public comments reflected support from the former tenants, who expressed satisfaction with the relocation process and the project's potential benefits. The project sponsor emphasized extensive community outreach over the past five years, including meetings and workshops with local stakeholders.

The Planning Department recommended approval of the revised project, highlighting its alignment with the Central SoMa area plan and its potential for long-term community benefits. These include street improvements, open space, and substantial development impact fees, which are expected to enhance the neighborhood and support local employment opportunities.

In conclusion, the commission's discussions underscored the project's significance as a key development in Central SoMa, with plans for substantial community investment and job creation. The project sponsor is eager to secure the necessary approvals to advance to the next stages of development, aiming to begin construction as market conditions improve.