California tiny home laws: where you can legally place one
California doesn't have one statewide rule that says yes or no to a park model tiny home on a residential lot. State law sets the classification and construction framework; whether you can place and live in one comes down to your specific county or city.
Last verified: September 6, 2026
Schedule Free ConsultationHow California classifies a tiny home on wheels
California's state government doesn't authorize a moveable tiny home statewide. Instead, it defines what one is and how it must be built and registered, and leaves the question of where it can be placed and lived in up to each county and city.
State classification
A movable tiny home on a chassis is generally treated as a park trailer under California Health and Safety Code Section 18009.3, or evaluated against the moveable tiny home construction and safety standards in HSC 18027.3, depending on the jurisdiction's own ordinance.
ADU law doesn't automatically cover it
California's statewide accessory dwelling unit reforms (AB 68, AB 881, and later amendments) require most cities and counties to allow ADUs, but they primarily govern site-built and manufactured ADUs. Whether a wheeled tiny home qualifies as an ADU is set locally, not by the statewide ADU statutes themselves.
The takeaway: state law tells you what a moveable tiny home is and how it must be registered. Your county or city tells you where it can actually go.
Best places for tiny homes in California
These are the counties and cities where we've verified the zoning ordinance directly and confirmed a clear path for a park model tiny home. This list grows as we finish researching the rest of the state.
Confirmed
Primary Home Path
Placer County
Placer County allows a certified moveable tiny house as the sole dwelling on a parcel in several residential and agricultural zones, and as an accessory dwelling unit in an even wider set of zones. One of the more developed tiny home ordinances in the state.
See Placer County rules
Confirmed
Primary Home Path
San Diego County
Following a September 2025 Director's Determination, San Diego County recognizes an ANSI A119.5-certified tiny home on wheels as a legal dwelling, usable as either a standalone primary residence or an ADU. One of the most flexible pathways we've found anywhere in the country.
See San Diego County rules
Confirmed
ADU Path
Humboldt County
Humboldt County created a specific "Moveable Tiny House" category, distinct from ordinary RVs, certified to ANSI A119.5 or NFPA 1192 and skirted to conceal the undercarriage. Once installed to county standards, it carries the same legal status as a conventional dwelling when sited alongside an existing home.
See Humboldt County rules
Confirmed
ADU Path
City of Fresno
Fresno was the first city in the nation to write tiny-home-on-wheels rules directly into its development code. Under Municipal Code Section 15-2754, a certified "Backyard Cottage" can be added behind an existing home as a full-time ADU. Note that unincorporated Fresno County has different, more restrictive rules than the city itself.
See City of Fresno rulesWe're still working through the rest of California's counties. Some, like Santa Cruz, adopted a tiny-home-as-ADU ordinance and then paused it after state guidance called that pathway into question, which is exactly why we verify each county directly rather than relying on general claims. Curious about a specific county or city? Reach out and we'll tell you what we know so far, confirmed or not.
Frequently asked questions
Does California allow tiny homes on wheels statewide?
No single state law authorizes them everywhere. State law defines what they are and how they must be built and registered; your county or city decides where they can be placed and lived in.
Are moveable tiny homes automatically ADUs in California?
Not automatically. Some counties and cities, like Placer County, Humboldt County and Fresno, specifically allow them as accessory dwelling units. Others don't recognize them as ADUs at all, even where standard ADU construction is allowed.
Can I place a Snake River Tiny Homes model on my own California land?
Yes, in the counties and cities that allow it. Placer County and San Diego County both have a confirmed path for a certified park model tiny home as a primary dwelling or an accessory dwelling unit, Humboldt County and Fresno confirm it as an ADU, and we deliver throughout California.
Can you help me check my specific California parcel?
Yes. Snake River Tiny Homes may provide general information to help buyers navigate local zoning and permitting questions, but this is not legal advice, and buyers are solely responsible for confirming compliance with their local jurisdiction.
Snake River Tiny Homes may provide general information to help buyers navigate local zoning and permitting questions, but this is not legal advice, and buyers are solely responsible for confirming compliance with their local jurisdiction.
Ready to find your legal spot in California?
Schedule a free consultation and we will go over your county's rules, our models, and delivery to your land.