Tiny Homes: Bonsall vs Chula Vista
How do tiny homes rules compare between Bonsall, CA and Chula Vista, CA?
Bonsall and Chula Vista have similar restriction levels.
Bonsall, CA
San Diego County
Tiny homes in unincorporated San Diego County are regulated differently based on type. Tiny homes on foundations are treated as ADUs (up to 1,200 sq ft detached). Tiny homes on wheels are treated as RVs and cannot serve as permanent dwellings. Building permits required for foundation-based tiny homes.
View full Bonsall rules →Chula Vista, CA
San Diego County
Tiny homes in Chula Vista are regulated either as ADUs under state law or as standard dwelling units subject to California Building Code requirements. Tiny homes on wheels are classified as recreational vehicles and may not be used as permanent residences. Factory-built tiny homes must meet HCD certification standards.
View full Chula Vista rules →Key Facts Comparison
| Fact | Bonsall | Chula Vista |
|---|---|---|
| On Foundation | Treated as ADU — permits required | - |
| On Wheels | Treated as RV — not permanent dwelling | Classified as RV — no permanent habitation |
| Max ADU Size | 1,200 sq ft detached | - |
| Building Code | Full compliance required for foundation | - |
| RV Residence | Not permitted as primary dwelling | - |
| As ADU | - | Permitted under state ADU law |
| Factory-Built | - | Must have HCD certification |
| Permit | - | Building permit required for permanent installation |
| Min Ceiling Height | - | 7 ft for habitable rooms |
Highlighted rows indicate differences between cities.
Bonsall FAQ
Can I build a tiny home in unincorporated San Diego County?
Yes, if it is on a permanent foundation. It will be regulated as an ADU with a maximum of 1,200 sq ft and must meet all building code requirements. A building permit from County PDS is required.
Can I live in a tiny home on wheels?
No. Tiny homes on wheels are classified as recreational vehicles and cannot be used as permanent residences under county zoning regulations.
What are the minimum size requirements?
California building code requires habitable rooms to be at least 70 sq ft with a 7-foot minimum ceiling height. There is no county-specific minimum square footage for an ADU beyond building code requirements.
Chula Vista FAQ
Can I put a tiny home on my property in Chula Vista?
A permanently-affixed tiny home on a foundation may be permitted as an ADU. It must meet all building code requirements and obtain a building permit. Tiny homes on wheels cannot be used as permanent residences.
Can I live in a tiny house on wheels in Chula Vista?
No. Tiny homes on wheels are classified as recreational vehicles and cannot be occupied as permanent dwellings on residential property under Chula Vista's zoning code.
What building codes apply to tiny homes in Chula Vista?
Permanent tiny homes must comply with the California Building Code or California Residential Code, including standards for minimum room sizes, ceiling height, ventilation, plumbing, and electrical systems.
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