Tiny Homes: Hesperia vs Rialto
How do tiny homes rules compare between Hesperia, CA and Rialto, CA?
Hesperia and Rialto have similar restriction levels.
Hesperia, CA
San Bernardino County
Hesperia treats permanently sited tiny homes as Accessory Dwelling Units under §16.12.360, allowing detached ADUs up to 1,200 sq ft (minimum 150 sq ft) on lots with an existing single-family residence. Detached ADUs are capped at 16 ft in height with 4-foot side/rear setbacks. Manufactured homes under 10 years old qualify. RVs explicitly do not qualify as ADUs under §16.12.360(E)(2).
View full Hesperia rules →Rialto, CA
San Bernardino County
Tiny homes in Rialto are regulated either as ADUs under California Government Code §65852.2 (state ADU law) and Rialto Municipal Code Title 18, or as RVs/manufactured housing under state HCD rules. Permanent tiny homes on foundations qualify as ADUs and benefit from California's ministerial-approval preemption.
View full Rialto rules →Key Facts Comparison
| Fact | Hesperia | Rialto |
|---|---|---|
| Max Detached ADU Size | 1,200 sq ft livable (§16.12.360(E)(2)) | - |
| Min ADU Size | 150 sq ft (no RVs qualify) | - |
| Max Height (Detached) | 16 ft (18 ft near transit); attached 25 ft | - |
| Setbacks | 4 ft side / 4 ft rear (§16.12.360(E)(4)) | - |
| Min Rental Term | 30 consecutive days (§16.12.360(D)(7)) | - |
| State Authority | Cal. Gov. Code §§65852.2, 65852.22 | - |
| Permanent tiny home | - | Processed as ADU per Cal. Gov. Code §65852.2 |
| On wheels (THOW) | - | RV under HCD Title 25 / Vehicle Code - not a dwelling unless ADU-certified |
| Building code | - | CRC Appendix Q for tiny houses under 400 sf |
| Local zoning | - | RMC Title 18 (must conform to state ADU law) |
Highlighted rows indicate differences between cities.
Hesperia FAQ
Can I live in a tiny home on wheels in Hesperia?
No. Recreational vehicles do not qualify as accessory dwelling units under Hesperia MC §16.12.360(E)(2). To legally live in a tiny home in Hesperia, it must be permanently sited, on a foundation, and permitted as an ADU or a manufactured home under California Health & Safety Code §18007.
How tall can a detached tiny home (ADU) be in Hesperia?
16 feet for a standard detached ADU under §16.12.360(E)(8), or up to 18 feet if located within one-half mile walking distance of a major transit stop, plus up to 2 additional feet to match the roof pitch of the primary home.
Can I Airbnb my Hesperia ADU?
No. Hesperia MC §16.12.360(D)(7) prohibits ADU rentals for terms shorter than 30 consecutive days, so vacation rental and short-term rental use of an ADU is not allowed regardless of platform.
Rialto FAQ
Can I live in a tiny home in my Rialto backyard?
Yes if it is permitted as an ADU under Cal. Gov. Code §65852.2 and built to the California Residential Code (CRC Appendix Q applies to tiny houses under 400 sf). Living in an RV or trailer as a permanent residence outside an RV park is prohibited.
Can Rialto require owner-occupancy for an ADU tiny home?
State ADU law currently bars Rialto from imposing owner-occupancy requirements on most newly permitted ADUs; check current Gov. Code §65852.2 amendments for the applicable date range.
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