San Mateo Infill Project to Replace Single-Family Home with 20 Studio Apartments

Preliminary plans have been submitted for a significant residential infill project at 606 South Delaware Street in San Mateo, aiming to transform a 0.1-acre property currently occupied by a single-family home. The proposal outlines the construction of a 20-unit studio apartment complex, designed to yield approximately 19,650 square feet of housing space within a 22,000 square foot building. This development is strategically located near downtown San Mateo, offering future residents convenient access to the Caltrain Station and local amenities.

The project incorporates four deed-restricted affordable units, with two designated for very low-income households and two for moderate-income households, addressing a critical need for diverse housing options. Developers Gustavo Hornos and Jesica Salomon are utilizing state legislation, specifically Senate Bill 79 and SB 330, to facilitate the approval process and exceed conventional zoning capacity. This approach highlights how state-level policies are enabling increased housing density in transit-rich areas. Amenities will include a ground-floor laundry room and a rooftop deck. For developers and investors, this project exemplifies the effective application of California's housing streamlining laws to unlock infill potential.