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San Mateo Regulation Guide

A guide to learn more about ADU regulation and zoning in San Mateo, CA

We are here to help you with information and knowledge looking for permitting guide to build ADU in San Mateo

San mateo City Hall Building

San Mateo County, California, approximately 20 miles (32 km) south of San Francisco, and 31 miles (50 km) northwest of San Jose. San Mateo had an estimated 2019 population of 104,430.[9] It has a Mediterranean climate, and is known for its rich history. The biggest economic contributors to the city include the Medical Center, one of the local school districts, and Sony’s Sony Interactive Entertainment division.


General Qualifications:
Planning Document:
County Ordinance:

City of San Mateo: Planning Department Contact Information

City of San Mateo, Planning Department 330 West 20th Avenue San Mateo, CA 94403
Phone: (650) 522-7212


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