San Mateo
San Mateo has a Mediterranean climate and is known for its rich history at the center of the San Francisco Bay Area. Some of the biggest economic drivers for the city include technology, health care and education
San Mateo ADU Permits and Regulations Resources
Learn about ADU regulations in the city of San Mateo
Learn about ADU regulations in San Mateo
the average rent for a 2-bedroom apartment in San Mateo, CA is $3,932.
Building permit information for San Mateo
City Planner
planning@cityofsanmateo.org 650-522-7212
When it comes to financing your ADU, our friends at San Mateo Credit Union offer ADU Loans, reach out to one of our home specialists for an introduction!
Regulations
Max ADU Size
Lot under 9,000 sqft: 600 sqft Lot between 9,000 and 1000 sqft: 650 sqft Lot over 10,000 sqft: 800 sqft
Front Setback
45’ Note: Front setbacks vary by zoning, please talk to a home specialist to confirm
Primary Residence Setback
10’
Side and Rear Setback
4’