ADU Rules: Florin vs Isleton
How do adu rules rules compare between Florin, CA and Isleton, CA?
Florin has fewer restrictions than Isleton.
Florin, CA
Sacramento County
Florin is an unincorporated CDP in Sacramento County governed by the Sacramento County Zoning Code §5.4.5 (Accessory Dwelling Units), not a separate city ordinance. The County allows one ADU plus one JADU on single-family lots; on multifamily lots, one conversion ADU is allowed per four existing units or up to two detached ADUs per property.
View full Florin 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 | Florin | Isleton |
|---|---|---|
| Governing Code | Sac County Zoning Code §5.4.5 | - |
| Max Detached (SF lot) | 1,200 sq ft | - |
| Max Multifamily ADU | 800 sq ft | - |
| Setback (side/rear) | 4 ft (new construction) | - |
| Impact Fees | Waived under 750 sq ft | - |
| Detached ADU | - | Up to 800 sq ft by right |
| Setbacks | - | 4 feet side and rear |
| Processing | - | 60 days maximum |
| Flood | - | FEMA BFE plus 1 foot |
| State Law | - | Gov Code 65852.2 |
Highlighted rows indicate differences between cities.
Florin FAQ
Who regulates ADUs in Florin?
Florin is unincorporated, so Sacramento County Planning regulates ADUs under Sacramento County Zoning Code §5.4.5, not a separate city ordinance.
How many ADUs can a Florin multifamily lot add?
Under §5.4.5 and state law, multifamily lots may add one conversion ADU per four existing units (within non-livable space) OR up to two detached ADUs per property — not both.
Can I rent my Florin ADU on Airbnb?
No. State ADU law and a recorded deed restriction prohibit short-term rental of ADUs built on or after January 1, 2020 in unincorporated Sacramento County.
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
See how Florin and Isleton 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