ADU Rules: Martinez vs Oakley
How do adu rules rules compare between Martinez, CA and Oakley, CA?
Martinez and Oakley have similar restriction levels.
Martinez, CA
Contra Costa County
Martinez complies with California Gov Code §65852.2 (statewide ADU law). One ADU and one JADU (up to 500 sq ft) are permitted per single-family lot. Detached ADUs up to 1,200 sq ft; attached up to 1,000 sq ft or 50% of primary home. 4-ft rear/side setbacks for new detached ADUs. ADUs under 750 sq ft exempt from impact fees. ADUs cannot be used as STRs per city's STR prohibition.
View full Martinez rules →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 →Key Facts Comparison
| Fact | Martinez | Oakley |
|---|---|---|
| Max Size (Detached) | 1,200 sq ft | - |
| Max Size (Attached) | 1,000 sq ft or 50% of primary home | - |
| Setbacks | 4 ft rear and interior side (new detached ADU) | 4 ft rear and side (new detached ADU) |
| STR Use | Prohibited — city bans all STRs | - |
| Max ADU Size | - | 1,200 sq ft (detached) |
| Minimum Height | - | 16 ft for detached ADU |
| Impact Fees | - | Exempt for ADUs under 750 sq ft |
Highlighted rows indicate differences between cities.
Martinez FAQ
Can I build an ADU on my property in Martinez?
Martinez complies with California Gov Code §65852.2 (statewide ADU law). One ADU and one JADU (up to 500 sq ft) are permitted per single-family lot. Detached ADUs up to 1,200 sq ft; attached up to 1,000 sq ft or 50% of primary home. 4-ft rear/side setbacks for new detached ADUs. ADUs under 750...
What are the size limits for an accessory dwelling unit in Martinez?
Max Size (Detached): 1,200 sq ft. Max Size (Attached): 1,000 sq ft or 50% of primary home. Setbacks: 4 ft rear and interior side (new detached ADU). STR Use: Prohibited — city bans all STRs.
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.
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