Garage Conversions: Fremont vs San Leandro
How do garage conversions rules compare between Fremont, CA and San Leandro, CA?
Fremont and San Leandro have similar restriction levels.
Fremont, CA
Alameda County
Fremont allows garage-to-ADU conversions by right under state law without replacement parking. Building permit required. Ministerial 60-day review.
View full Fremont rules →San Leandro, CA
Alameda County
Converting an existing attached or detached garage into an ADU or JADU is a ministerial 60-day approval under San Leandro Zoning Code Sec. 2.04.388, and California Government Code Sec. 66314 prohibits the city from requiring replacement of the displaced parking spaces.
View full San Leandro rules →Key Facts Comparison
| Fact | Fremont | San Leandro |
|---|---|---|
| ADU Conversion | Allowed by right | - |
| Replacement Parking | Not required | - |
| Ceiling Height | 7 ft minimum | - |
| Review | 60 days ministerial | - |
| Non-ADU Conversion | Building permit required | - |
| Local code section | - | Zoning Code §2.04.388 |
| State authority | - | Cal. Gov. Code §§66310-66342 (formerly 65852.2/65852.22) |
| Approval timeline | - | 60 days (ministerial) |
| Parking replacement | - | Not required (Gov. Code §66314(d)) |
| Setbacks for conversion of existing space | - | None required |
| JADU max size | - | 500 sf, within single-family footprint |
| Design | - | Garage door must be replaced with wall material matching main house |
Highlighted rows indicate differences between cities.
Fremont FAQ
Do I need a new driveway if I convert my garage?
No. Fremont cannot require replacement parking for garage-to-ADU conversions under state law. You may retain the existing driveway for uncovered parking or remove it to add landscaping.
Can I convert a detached garage?
Yes. Detached garage conversions are treated the same as attached conversions under 65852.2 and benefit from the 4-foot side/rear setback exception if the existing structure already has nonconforming setbacks.
San Leandro FAQ
Do I need to replace my garage parking if I convert it to an ADU?
No. California Government Code Sec. 66314(d) (and San Leandro Zoning Code Sec. 2.04.388) bars the city from requiring replacement off-street parking when an existing garage, carport, or covered parking is converted to or demolished for an ADU/JADU.
How long does San Leandro have to approve my garage-conversion ADU?
60 days from the date the city deems the application complete. The review is ministerial — no public hearing, no discretionary findings. San Leandro also runs a Pre-Reviewed ADU Program for detached units to further speed approval.
Can I just convert my garage informally without a permit?
No. Unpermitted garage conversions are a top Code Enforcement priority. The city's Unpermitted Work page warns that you must either legalize through the ADU process or restore the garage to its original state under a building permit. Doing nothing creates a recorded violation that follows the property at sale.
Compare other topics
See how Fremont and San Leandro compare on other ordinance categories.
Want to add a third city?
Use our full comparison tool to compare up to three cities.
Open Comparison Tool