Price Reduced!!! 38 S B Street, San Mateo, CA One office space available for lease now. +/-2200 sq ft ($6,495 per month) 2nd floor office space. Gross lease. Location Description: Office Space is located across the street from Caltrain San Mateo. Great location if you have employees commuting from San Francisco or South Bay. It is located above Jeffrey's Hamburgers and Joy Sushi. Located in the heart of downtown San Mateo. Prime location, walking distance to Blue Bottle Coffee, Philz Coffee, Sushi Sams, Pacific Catch, Movie Theatres, Draegars, Corepower Yoga, Orange Theory Fitness, and so much more!