ADU Regulations in Santa Maria, California (2026)
Summary from local ordinance data. Verify with city planning for your specific lot.
Regulations at a glance
| Rule | Value |
|---|---|
| Max ADU Size | 1200 sq ft |
| Side Setback | 4 ft |
| Rear Setback | 4 ft |
| Max Height | 16 ft |
| Approval Type | Ministerial (by-right) per Gov Code §65852.2 |
| Parking Requirements | true |
Local rules & notes
Growth Mitigation Fee Exemption: The city explicitly waives growth mitigation fees for any ADU that is smaller than 750 square feet. JADU Parking Replacement Requirement: Unlike some jurisdictions, if a garage is converted to a JADU, onsite replacement parking must be provided in conformance with Chapter 12-32, though it does not need to be covered.
For the official ordinance and latest updates, check your city or county planning department.
Frequently asked questions about ADU regulations in Santa Maria
What is the maximum ADU size in Santa Maria, California?
In Santa Maria, the maximum ADU size is typically 1200 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; Santa Maria may follow state defaults or have local limits. Verify with Santa Maria planning for your specific lot.
What are the setback requirements for ADUs in Santa Maria?
In Santa Maria, 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 Santa Maria planning for overlay zones or design standards that could affect your site.
What is the maximum height for an ADU in Santa Maria?
In Santa Maria, 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 Santa Maria or county planning for your zone.
Is ADU approval ministerial in Santa Maria?
In Santa Maria, 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; Santa Maria planning can confirm the exact process.
Are there parking requirements for ADUs in Santa Maria?
In Santa Maria, parking for ADUs is generally true. California law often waives parking for ADUs within a half-mile of transit or in certain historic districts. Check with Santa Maria planning for your address.
Check if your specific address qualifies
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