San Rafael's Accessory Structures: The Rules That Matter
Every city handles accessory structures a little differently. In San Rafael, California, there are 3 distinct rules that residents and property owners should be aware of. Some are stricter than what neighboring cities enforce, and others are more relaxed. Here is what you need to know.
ADU Rules
San Rafael follows state ADU law (Government Code §66341-66342) and has local implementing zoning standards in Chapter 14. ADUs up to 850 sq ft (or 1,000 sq ft for a 2-bedroom) are ministerially approved on lots with an existing or proposed single-family dwelling. Junior ADUs up to 500 sq ft are also permitted.
Key details: Max Size: 850 sf (1,000 for 2-BR). JADU Max: 500 sf. Setback: 4 ft side/rear. STR Allowed: No.
Unpermitted ADUs are abatable under §12.100.010 and may require legalization or removal. Operating an ADU as an STR is a Chapter 10.110 violation.
The rules around adu rules in San Rafael lean permissive, but that does not mean anything goes.
Shed Rules
Sheds in San Rafael must meet zoning setback rules for accessory structures. Under the California Building Code, a building permit is generally required for sheds over 120 square feet; smaller sheds still must meet placement rules.
Key details: Permit Threshold: Over 120 sq ft. Setbacks: Per zoning. Code Basis: CA Building Code. Authority: Building / planning.
Contact your local code enforcement office for specific penalty information.
Garage Conversions
Converting a garage to living space in San Rafael requires a building permit and zoning review for egress, light/ventilation and parking; converting to a separate unit is often processed as an ADU under state law.
Key details: Permit: Building permit required. If Separate Unit: ADU rules apply. Parking: Often not required (ADU). Authority: Building / planning.
Contact your local code enforcement office for specific penalty information.
The Bottom Line
San Rafael's accessory structures rules are a mixed bag. Some areas are strict, others are relaxed, and the details matter. The best approach is to check the specific rule that applies to your situation rather than assuming San Rafael is broadly strict or permissive.
This guide is based on San Rafael's current municipal code. Local rules can and do change, so check the individual ordinance pages for the latest details, penalties, and FAQs.