Folsom vs Isleton
How do adu rules rules compare between Folsom, CA and Isleton, CA?
Folsom has fewer restrictions than Isleton.
Folsom, CA
Sacramento County
Folsom must allow ADUs on all residential lots under CA Gov Code §65852.2. Ministerial approval within 60 days for ADUs up to 800 sq ft with 4-foot setbacks, no owner-occupancy requirement, and no parking within 1/2 mile of transit. Folsom has adopted an ADU ordinance with local standards that cannot fall below state minimums.
View full Folsom 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 | Folsom | Isleton |
|---|---|---|
| State Law | Gov Code §65852.2 | Gov Code 65852.2 |
| Size | Up to 800 sq ft ministerial | - |
| Setbacks | 4 ft rear/side | 4 feet side and rear |
| Parking | None w/in 1/2 mi transit | - |
| Timeline | 60-day approval | - |
| Detached ADU | - | Up to 800 sq ft by right |
| Processing | - | 60 days maximum |
| Flood | - | FEMA BFE plus 1 foot |
Highlighted rows indicate differences between cities.
Folsom FAQ
Can Folsom deny my ADU permit?
Only for objective code violations (safety, setbacks from state minimums, utilities). The city cannot deny based on neighborhood character, discretionary design review, or owner-occupancy preference under state law.
Can I rent my Folsom ADU on Airbnb?
ADUs cannot be rented for terms under 30 days under state law (Gov Code §65852.2(a)(6)). Long-term rental is permitted; short-term vacation rental is not.
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.
Compare other topics
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