The generally rectangular-shaped project site is located at 620 3rd Street midblock on 3rd Street between Brannan and Townsend streets. The project site consists of block/lot number 3787/005. The site is developed with a two-story, 41,680 square-foot warehouse building, which is a contributory structure to the Clyde and Crooks Warehouses Historic District, that is currently used as a data center. The project proposes a third-story vertical addition consisting of 16,296 square feet of office use and the conversion of the existing data center use to office use. In total, the project would contain 49,990 square feet of office space. The proposed project would also include 2,567 square feet of ground floor retail along the 3rd Street frontage, 10 class I and three class II bicycle spaces, bicycle showers and lockers, 943 square feet of private open space at the third floor, and a solar-ready and living roof area. Proposed improvements in the public right-of-way include six new street trees and two new class II bicycle parking racks on 3rd Street, and seven new street trees and one new class II bicycle parking rack on Ritch Street. A new 10-foot sidewalk would also be constructed along the project’s Ritch Street frontage. No diesel backup generators are proposed on-site. Construction of the proposed project is anticipated to take 12 months. Project construction would not entail any excavation, grading, or ground disturbance, except for the construction of the proposed sidewalks on 3rd Street and Ritch Street and 30 cubic yards of soil disturbance for an elevator pit. Construction equipment staging would primarily occur in the adjacent parking lot to the northwest of the subject building. Intermittent sidewalk or traffic lane closures may be required to move construction equipment and construct right-of-way improvements.

The property is located within an Article 10 historic district. The proposed project is to convert the underutilized data center into an office space. The proposal adds an additional floor to the existing two story structure while maintaining the building's character and street presence. This also creates a public open space area at the third floor level. The ground floor is enhanced through the addition of two large activation zones along the 3rd Street frontage. The PPA was accepted on 01/05/21 and the 60 day deadline is 03/08/21.

Clyde and Crooks Warehouse Historic District (formerly South End Historic District Addition)

Designate South End Historic District.