Tiny Homes: Bostonia vs Carlsbad
How do tiny homes rules compare between Bostonia, CA and Carlsbad, CA?
Bostonia and Carlsbad have similar restriction levels.
Bostonia, 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 Bostonia rules →Carlsbad, CA
San Diego County
Carlsbad permits ADUs in residential zones per state law and local Ordinance CS-384. Detached ADUs up to 1,200 sq ft. JADUs up to 500 sq ft within existing residence. Setbacks: 4 ft rear and side per state law.
View full Carlsbad rules →Key Facts Comparison
| Fact | Bostonia | Carlsbad |
|---|---|---|
| On Foundation | Treated as ADU — permits required | - |
| On Wheels | Treated as RV — not permanent dwelling | - |
| Max ADU Size | 1,200 sq ft detached | - |
| Building Code | Full compliance required for foundation | - |
| RV Residence | Not permitted as primary dwelling | - |
| Detached ADU | - | Up to 1,200 sq ft |
| JADU | - | Up to 500 sq ft |
| Setbacks | - | 4 ft side/rear |
| Processing | - | Ministerial, 60 days |
| Ordinance | - | CS-384 |
Highlighted rows indicate differences between cities.
Bostonia 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.
Carlsbad FAQ
Build a tiny home?
Yes as ADU. Up to 1,200 sq ft detached in residential zones.
Parking?
No replacement parking required per SB 1211.
Processing time?
Ministerial review within 60 days.
Compare other topics
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