ADU Rules: Bonsall vs Oceanside
How do adu rules rules compare between Bonsall, CA and Oceanside, CA?
Bonsall and Oceanside have similar restriction levels.
Bonsall, CA
San Diego County
San Diego County allows Accessory Dwelling Units (ADUs) on residential properties in unincorporated areas per state law and the County ADU Handbook. Detached ADUs up to 1,200 sq ft. Must maintain 4-foot side/rear setbacks. ADUs up to 800 sq ft are exempt from lot coverage limits.
View full Bonsall rules →Oceanside, CA
San Diego County
Oceanside allows ADUs per state mandate (Gov Code §65852.2) and local Zoning Ordinance Section 3006. Detached ADUs up to 1,200 sq ft. Height 16 ft standard, 18 ft near transit, 20 ft with matching roof pitch. 4-foot side/rear setbacks.
View full Oceanside rules →Key Facts Comparison
| Fact | Bonsall | Oceanside |
|---|---|---|
| Max Size (Detached) | 1,200 sq ft | - |
| Side/Rear Setback | 4 feet minimum | - |
| Lot Coverage Exempt | ADUs up to 800 sq ft | - |
| Height (at property line) | 16 ft max, else 4 ft setback | - |
| Separation | 6 ft from other structures | - |
| Max Size | - | 1,200 sq ft detached |
| Height | - | 16 ft (18-20 near transit) |
| Setbacks | - | 4 ft side/rear |
| Code | - | OZO §3006 |
Highlighted rows indicate differences between cities.
Bonsall FAQ
Can I build an ADU in unincorporated San Diego County?
Yes. State law requires the County to allow ADUs on residential properties. Detached ADUs up to 1,200 sq ft are permitted with a building permit from County PDS.
What are the setback requirements for an ADU?
Both attached and detached ADUs must maintain at least 4-foot side and rear setbacks. Detached ADUs 16 feet tall or less may be at the property line. Front setbacks follow the underlying zone.
Does an ADU count toward lot coverage?
ADUs up to 800 sq ft are exempt from lot coverage requirements, meaning you can build one even if your lot is at the maximum allowed coverage.
Oceanside FAQ
Can I build an ADU on my property in Oceanside?
Oceanside allows ADUs per state mandate (Gov Code §65852.2) and local Zoning Ordinance Section 3006. Detached ADUs up to 1,200 sq ft. Height 16 ft standard, 18 ft near transit, 20 ft with matching roof pitch. 4-foot side/rear setbacks.
What are the size limits for an accessory dwelling unit in Oceanside?
Max Size: 1,200 sq ft detached. Height: 16 ft (18-20 near transit). Setbacks: 4 ft side/rear. Code: OZO §3006.
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