Garage Conversions: Bostonia vs San Diego
How do garage conversions rules compare between Bostonia, CA and San Diego, CA?
Bostonia and San Diego have similar restriction levels.
Bostonia, CA
San Diego County
Garage conversions to ADUs or habitable space in unincorporated San Diego County require building permits. California law allows garage conversions to ADUs without replacement parking. The conversion must meet building code requirements for habitable space including egress, ventilation, and plumbing.
View full Bostonia rules →San Diego, CA
San Diego County
San Diego permits garage conversions to ADUs under state law (Government Code 65852.2) without requiring replacement parking. Conversions must meet Building Code standards for habitable space including egress, ventilation, insulation, and fire separation. Permits required through Development Services.
View full San Diego rules →Key Facts Comparison
| Fact | Bostonia | San Diego |
|---|---|---|
| Permit Required | Yes — building permit from PDS | Yes, through DSD |
| Replacement Parking | Not required (state law) | Not required |
| Ceiling Height | 7 feet minimum | 7 feet minimum |
| Egress | Required in bedrooms | - |
| State Law | Gov. Code §65852.2 | - |
| Impact Fees | - | Waived under 750 sq ft |
| Code | - | CA Gov Code 65852.2 + SDMC |
Highlighted rows indicate differences between cities.
Bostonia FAQ
Can I convert my garage to living space in San Diego County?
Yes. California law allows garage conversions to ADUs. You need a building permit from County PDS. The conversion must meet building code requirements for habitable space.
Do I need to replace the parking space if I convert my garage?
No. California state law prohibits the County from requiring replacement parking spaces when converting a garage to an ADU.
What building codes apply to garage conversions?
The conversion must meet California Building Code requirements for habitable space including minimum ceiling height, natural light, ventilation, egress, electrical, plumbing, and energy efficiency standards.
San Diego FAQ
Can I convert my garage to a living space in San Diego?
Yes, as an ADU. No replacement parking is required under state law. The space must meet Building Code standards for habitable space and requires a building permit.
Does a garage conversion count toward my ADU limit?
A converted garage is a 'converted ADU,' separate from the detached/attached ADU allowance. You can have both a converted garage ADU and an additional ADU on a single-family lot.
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