ADU Rules: Carmichael vs Isleton
How do adu rules rules compare between Carmichael, CA and Isleton, CA?
Carmichael has fewer restrictions than Isleton.
Carmichael, CA
Sacramento County
Sacramento County permits ADUs and JADUs on all residential lots per Government Code 65852.2. Detached ADUs up to 1,200 sq ft, 4 ft setbacks, and streamlined 60-day ministerial review are standard.
View full Carmichael rules →Isleton, CA
Sacramento County
California state ADU law (Gov Code 65852.2) overrides most local rules. Isleton must allow up to 800 sq ft detached ADUs with 4-foot setbacks. Delta flood zone adds FEMA elevation requirements.
View full Isleton rules →Key Facts Comparison
| Fact | Carmichael | Isleton |
|---|---|---|
| Max Size | 1,200 sq ft detached | - |
| Setbacks | 4 ft side and rear | 4 feet side and rear |
| Review | 60 days ministerial | - |
| Parking | Often not required | - |
| Fees | Waived under 750 sq ft | - |
| Detached ADU | - | Up to 800 sq ft by right |
| Processing | - | 60 days maximum |
| Flood | - | FEMA BFE plus 1 foot |
| State Law | - | Gov Code 65852.2 |
Highlighted rows indicate differences between cities.
Carmichael FAQ
Can I build both an ADU and a JADU?
Yes. State law allows one detached ADU plus one JADU inside the primary dwelling on a single-family lot.
Do I need to live on-site?
Owner-occupancy is required for JADUs but not for standard ADUs under current state law.
Isleton FAQ
Can Isleton deny my ADU permit?
Not for meeting state minimums. The city must permit an ADU that meets the state law standards within 60 days.
How does flooding affect ADU construction?
Isleton is in FEMA Zone AE. Living space must be elevated to base flood elevation plus 1 foot, or the structure must be flood-resistant.
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