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City of San Mateo Municipal Code.

27.22.110 DWELLING STANDARDS.

Every multiple family building hereinafter erected or established in a multiple family district, shall provide a minimum floor area for each dwelling unit with or without a kitchen in compliance with the following:

Unit Type Square Feet
(a) Bachelor or studio-type dwelling units
(1) Without kitchens 350
(2) With kitchens 350
(b) One-bedroom dwelling units
(1) Without kitchens 500
(2) With kitchens 540
(c) Two-bedroom dwelling units
(1) Without kitchens 600
(2) With kitchens 750
(d) Three-bedroom dwelling units 960

The floor area shall be measured from the center of the walls enclosing each dwelling unit, and may include all closet space and storage area contained within the dwelling unit; but shall not include outside patios, balconies, or terraces, or utility rooms used jointly by the occupants.