ADU Regulations in San Rafael, California (2026)

Regulations at a glance

Local rules & notes

Front Setback Waiver for 800 Sq Ft Units: Front setbacks cannot be enforced if they prevent the construction of an 800 sq ft ADU with 4-foot side/rear setbacks. Legalization of Unpermitted Structures: The county cannot deny an ADU permit based on existing unpermitted structures or nonconforming zoning conditions on the property. Separate Conveyance for Nonprofits: While separate sale of ADUs is generally prohibited, an exception exists for properties involving qualified nonprofit housing organizations.

For the official ordinance and latest updates, check your city or county planning department.

Frequently asked questions about ADU regulations in San Rafael

• What is the maximum ADU size in San Rafael, California?

  In San Rafael, the maximum ADU size is typically NaN square feet, depending on whether the unit is attached or detached. California state law allows up to 1,200 sq ft for detached ADUs and 800 sq ft for attached in many jurisdictions; San Rafael may follow state defaults or have local limits. Verify with San Rafael planning for your specific lot.

• What are the setback requirements for ADUs in San Rafael?

  In San Rafael, typical setback requirements are 4 feet from the side property line and 4 feet from the rear. These may be reduced to 4 feet under California Government Code § 65852.2 where applicable. Check with San Rafael planning for overlay zones or design standards that could affect your site.

• What is the maximum height for an ADU in San Rafael?

  In San Rafael, the maximum height for an ADU is generally 16 feet. State law often allows up to 16 feet for detached ADUs and up to 25 feet when within 4 feet of the property line in some cases. Confirm with San Rafael or county planning for your zone.

• Is ADU approval ministerial in San Rafael?

  In San Rafael, ADU approval is typically Ministerial (by-right) per Gov Code §65852.2. Ministerial (by-right) review means the city must approve qualifying applications without discretionary review, per California Gov Code § 65852.2. Your project must still meet objective standards; San Rafael planning can confirm the exact process.

• Are there parking requirements for ADUs in San Rafael?

  In San Rafael, parking for ADUs is generally Often waived per state law; check local ordinance. California law often waives parking for ADUs within a half-mile of transit or in certain historic districts. Check with San Rafael planning for your address.