ADU Rules: Oakley vs Richmond
How do adu rules rules compare between Oakley, CA and Richmond, CA?
Richmond has fewer restrictions than Oakley.
Oakley, CA
Contra Costa County
Oakley complies with California Gov Code §65852.2 (statewide ADU law). Single-family lots may have one ADU plus one JADU. Maximum ADU size: 1,200 sq ft; no minimum lot size restriction. Setbacks: 4 ft from side/rear property lines (new detached ADU). Minimum height: 16 ft. ADUs under 750 sq ft are exempt from impact fees. ADU permit applications processed in 60 days maximum.
View full Oakley rules →Richmond, CA
Contra Costa County
Richmond allows ADUs in all residential zones under RMC §15.04.610.020 and CA Gov Code §65852.2. Detached ADUs up to 1,200 sq ft, attached up to 50% of primary or 1,200 sq ft. JADUs up to 500 sq ft. Height limit 16 ft for detached. Ministerial approval (no public hearing). Pre-approved plans available free of charge.
View full Richmond rules →Key Facts Comparison
| Fact | Oakley | Richmond |
|---|---|---|
| Max ADU Size | 1,200 sq ft (detached) | - |
| Setbacks | 4 ft rear and side (new detached ADU) | - |
| Minimum Height | 16 ft for detached ADU | - |
| Impact Fees | Exempt for ADUs under 750 sq ft | - |
| Max Size (Detached) | - | 1,200 sq ft |
| JADU | - | Up to 500 sq ft |
| Height | - | 16 ft (detached) |
| Pre-Approved Plans | - | Available free from city |
| Permit Time | - | 6-8 weeks typical |
Highlighted rows indicate differences between cities.
Oakley FAQ
Can I build an ADU on my property in Oakley?
Oakley complies with California Gov Code §65852.2 (statewide ADU law). Single-family lots may have one ADU plus one JADU. Maximum ADU size: 1,200 sq ft; no minimum lot size restriction. Setbacks: 4 ft from side/rear property lines (new detached ADU). Minimum height: 16 ft. ADUs under 750 sq ft...
What are the size limits for an accessory dwelling unit in Oakley?
Max ADU Size: 1,200 sq ft (detached). Setbacks: 4 ft rear and side (new detached ADU). Minimum Height: 16 ft for detached ADU. Impact Fees: Exempt for ADUs under 750 sq ft.
Richmond FAQ
Can I build an ADU on my property in Richmond?
Richmond allows ADUs in all residential zones under RMC §15.04.610.020 and CA Gov Code §65852.2. Detached ADUs up to 1,200 sq ft, attached up to 50% of primary or 1,200 sq ft. JADUs up to 500 sq ft. Height limit 16 ft for detached. Ministerial approval (no public hearing). Pre-approved plans...
What are the size limits for an accessory dwelling unit in Richmond?
Max Size (Detached): 1,200 sq ft. JADU: Up to 500 sq ft. Height: 16 ft (detached). Pre-Approved Plans: Available free from city.
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