Permits were filed for a 12-story adaptive reuse of an office building at Rockridge Geotechnical’s 2121 South El Camino Real site in San Mateo. The project hopes to convert the tower into a 144-unit residential complex, with 22 of the 144 units designated as affordable. Amenities would include a new lobby, fitness center, and landscaped courtyard.

From SFYIMBY: https://sfyimby.com/2026/04/formal-application-for-2121-south-el-camino-real-san-mateo.html