Carports in San Mateo require a building permit under Title 23 and must comply with the zoning standards in Title 27. Carports count toward lot coverage calculations. Garage or carport conversions to ADUs are specifically addressed under Chapter 27.19.
The City of San Mateo regulates carports as accessory structures under the zoning ordinance (Title 27). A building permit is required under Title 23 for all new carport construction. Carports must meet setback requirements for the applicable zone district and are included in lot coverage calculations. Notably, under the ADU provisions of Chapter 27.19, existing garages and carports may be converted to accessory dwelling units. When a garage or carport is demolished or converted to an ADU, replacement off-street parking is not required. Carports in front yard setback areas are generally not permitted. The Community Development Department reviews all applications at 650-522-7200.
Building a carport without a permit violates Title 23. Code enforcement may require demolition or retroactive permitting. Setback violations require a planning application for variance or exception.
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Side-by-side rule comparisons with other cities in San Mateo County.
See how other cities in San Mateo County handle carport rules.
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