Tiny Homes: Altadena vs Carson
How do tiny homes rules compare between Altadena, CA and Carson, CA?
Altadena and Carson have similar restriction levels.
Altadena, 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 Altadena rules →Carson, CA
Los Angeles County
Tiny homes in Carson are regulated under California state ADU law (Gov. Code §65852.2) when used as a permanent dwelling; movable tiny houses on wheels are regulated under HCD's Movable Tiny House standards and California Health & Safety Code §18007.
View full Carson rules →Key Facts Comparison
| Fact | Altadena | Carson |
|---|---|---|
| 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 | - |
| Permanent tiny home | - | Treated as ADU under Gov. Code §65852.2 |
| Detached ADU size | - | Up to 850 sq ft (1 BR) or 1,000 sq ft (2+ BR) |
| Height limit | - | 16 ft (up to 18-25 ft near transit per state law) |
| Setback | - | 4 ft side/rear minimum (state ADU standard) |
| Movable tiny house | - | HCD-certified per HSC §18007; treated as RV by zoning |
Highlighted rows indicate differences between cities.
Altadena 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.
Carson FAQ
Can I live in a tiny house on wheels on my Carson property?
Generally no. Movable Tiny Houses (MTH) under HCD standards and Health & Safety Code §18007 are treated like RVs by Carson zoning (CMC Article IX, Ch. 1) and cannot be used as permanent dwellings outside an approved mobilehome park. A permanent-foundation tiny home, however, can be permitted as an ADU under Gov. Code §65852.2.
How big can a detached tiny-home ADU be in Carson?
Under state ADU law (Gov. Code §65852.2), Carson must allow a detached ADU up to 850 sq ft (one-bedroom) or 1,000 sq ft (two or more bedrooms), 16 ft tall (higher near transit), with 4-ft side/rear setbacks. Approval is ministerial within 60 days.
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