Garage Conversions: Isleton vs Rancho Cordova
How do garage conversions rules compare between Isleton, CA and Rancho Cordova, CA?
Rancho Cordova has fewer restrictions than Isleton.
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 →Rancho Cordova, CA
Sacramento County
Rancho Cordova allows conversion of an existing garage to an ADU or JADU under RCMC §23.901.060 and California Government Code §65852.2. Replacement parking is not required, and the conversion of a legally established structure is exempt from the 4-foot setback requirement.
View full Rancho Cordova rules →Key Facts Comparison
| Fact | Isleton | Rancho Cordova |
|---|---|---|
| Replacement Parking | Not required | Not required |
| Processing | 60 days | - |
| Flood BFE | Must meet for living space | - |
| Substantial Improvement | 50 percent rule | - |
| Authority | Sac County Building | - |
| Code Section | - | RCMC 23.901.060; Cal. Gov Code §65852.2 |
| Existing Setbacks | - | Exempt from 4 ft new-construction |
| JADU Max Size | - | 500 sq ft (attached only) |
| Permit Timeline | - | 60 days ministerial |
Highlighted rows indicate differences between cities.
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.
Rancho Cordova FAQ
Do I have to replace parking if I convert my Rancho Cordova garage to an ADU?
No. State ADU law (Cal. Gov Code §65852.2), implemented through RCMC 23.901.060, prohibits Rancho Cordova from requiring replacement parking when an existing garage is converted to an ADU.
Do conversion ADUs have to meet the 4-foot setback in Rancho Cordova?
No. Under RCMC 23.901.060, conversions of legally established structures are exempt from the 4-foot side and rear setback requirement that applies to new construction ADUs.
Do I need a permit to convert a Rancho Cordova garage?
Yes. A building permit is required for any change of use from garage to habitable space. Rancho Cordova must issue the permit within 60 calendar days of a complete application under RCMC 23.901.060.
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