Tiny Homes: Castaic vs Los Angeles
How do tiny homes rules compare between Castaic, CA and Los Angeles, CA?
Castaic and Los Angeles have similar restriction levels.
Castaic, CA
Los Angeles County
Tiny homes on permanent foundations are treated as ADUs under CA Gov Code 65852.2 and LA County's ADU ordinance in unincorporated areas. Tiny homes on wheels are not recognized as permanent dwellings. LA County allows ADUs up to 1,200 sq ft detached with 4 ft side/rear setbacks.
View full Castaic rules →Los Angeles, CA
Los Angeles County
Los Angeles permits movable tiny homes (MTH) as ADUs through a ministerial process in residential zones per LAMC 12.22 A.33. MTHs must meet ANSI A119.5 or NFPA 1192 standards. They are restricted in VHFHSZ hillside areas. Sprinklers are not required for MTHs if not required for the primary residence. Standard ADU size, setback, and lot requirements apply.
View full Los Angeles rules →Key Facts Comparison
| Fact | Castaic | Los Angeles |
|---|---|---|
| On Foundation | Treated as ADU, permitted | - |
| On Wheels | Not allowed as permanent dwelling | - |
| Max ADU Size | 1,200 sq ft detached | - |
| State Law | CA Gov Code 65852.2 | - |
| Approval | - | Ministerial process, no discretionary review |
| Standards | - | ANSI A119.5 or NFPA 1192 |
| Fire Zones | - | Restricted in VHFHSZ hillside areas |
| Sprinklers | - | Not required if primary has none |
| Code Section | - | LAMC 12.22 A.33 |
Highlighted rows indicate differences between cities.
Castaic FAQ
Can I put a tiny home in my backyard in unincorporated LA County?
Yes, if it's on a permanent foundation and meets ADU requirements. Detached units up to 1,200 sq ft are allowed with 4-foot setbacks. You need a building permit from LA County Building & Safety.
Can I live in a tiny home on wheels in LA County?
No. Tiny homes on wheels are classified as recreational vehicles and cannot be used as permanent dwellings. They can be parked on your property subject to RV parking rules but cannot be connected to utilities as a residence.
What permits do I need for a tiny home ADU?
You need a building permit from LA County Building & Safety. Under state law, ADU permits must be approved ministerially (no discretionary review) within 60 days if plans comply with standards. Contact (626) 458-3171.
Los Angeles FAQ
Can I put a tiny home in my backyard?
Possibly under Los Angeles ADU rules if on a permanent foundation. Tiny homes on wheels face stricter zoning limitations.
What is the minimum house size?
Los Angeles typically requires 400 to 800+ square feet for a primary dwelling. ADU rules may allow smaller secondary units.
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