Folsom vs Isleton
How do garage conversions rules compare between Folsom, CA and Isleton, CA?
Folsom has fewer restrictions than Isleton.
Folsom, CA
Sacramento County
Garage conversions to ADUs are streamlined under CA Gov Code §65852.2 — Folsom cannot require replacement parking for converted garages and must approve ministerially. Conversion to non-ADU habitable space (family room, bedroom) requires standard building permit and may trigger parking replacement requirements.
View full Folsom rules →Isleton, CA
Sacramento County
California AB 68 and SB 13 streamlined garage-to-ADU conversions and removed required replacement parking in most cases. Flood elevation still applies in Isleton's FEMA AE zone.
View full Isleton rules →Key Facts Comparison
| Fact | Folsom | Isleton |
|---|---|---|
| ADU Path | Ministerial 60-day approval | - |
| No Parking Req. | Converted garage ADU | - |
| Non-ADU Use | Standard building permit | - |
| Habitability | Egress + Title 24 | - |
| State Law | Gov §65852.2 | - |
| Replacement Parking | - | Not required |
| Processing | - | 60 days |
| Flood BFE | - | Must meet for living space |
| Substantial Improvement | - | 50 percent rule |
| Authority | - | Sac County Building |
Highlighted rows indicate differences between cities.
Folsom FAQ
Do I have to build new parking if I convert my Folsom garage to an ADU?
No. California state law (Gov §65852.2) prohibits cities from requiring replacement parking when a garage is converted to an ADU. This is true even if the lot is more than 1/2 mile from transit.
Can I just convert my garage to a bedroom without a permit?
No. Any conversion of a garage to habitable space requires a building permit, egress compliance, insulation, electrical/HVAC to code, and inspection. Unpermitted conversions cause insurance and resale problems.
Isleton FAQ
Do I have to replace my parking if I convert my garage?
Not in most cases. State law exempts ADU conversions from replacement-parking requirements near transit and in certain zones.
What does the 50 percent rule mean?
FEMA substantial-improvement rules require full flood-compliance upgrades if improvements exceed 50 percent of pre-improvement market value.
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