Tiny Homes: El Cajon vs Vista
How do tiny homes rules compare between El Cajon, CA and Vista, CA?
El Cajon and Vista have similar restriction levels.
El Cajon, CA
San Diego County
El Cajon allows tiny homes as ADUs under California Government Code 65852.2 and ECMC Chapter 17.220. A tiny home on a permanent foundation that meets building code may qualify as a junior ADU (up to 500 sq ft) or standard ADU (up to 1,200 sq ft) without requiring separate zoning approval.
View full El Cajon rules →Vista, CA
San Diego County
Vista permits tiny homes on foundations as ADUs under state ADU law. Tiny homes on wheels (THOWs) are not recognized as permanent dwellings under VMC. Minimum dwelling unit sizes apply per the development code.
View full Vista rules →Key Facts Comparison
| Fact | El Cajon | Vista |
|---|---|---|
| Max ADU Size | 1,200 sq ft detached; 500 sq ft JADU | 1,200 sq ft detached |
| Foundation | Permanent foundation required | - |
| Tiny Home on Wheels | Classified as RV — not permanent housing | - |
| Setbacks | 4 ft side/rear for detached ADU | - |
| Code Reference | ECMC Ch. 17.220; CA Gov Code §65852.2 | - |
| Min JADU Size | - | 150 sq ft |
| THOWs | - | Not allowed as dwellings |
| ADU Setback | - | 4 ft side/rear |
Highlighted rows indicate differences between cities.
El Cajon FAQ
Can I put a tiny home on my property in El Cajon?
Yes, if it is on a permanent foundation and meets building code. It would be permitted as an ADU under ECMC Chapter 17.220 and state ADU law.
Are tiny homes on wheels allowed as housing in El Cajon?
No. Tiny homes on wheels are classified as recreational vehicles under California law and cannot be used as permanent residences on residential lots.
Do I need a permit for a tiny home ADU?
Yes. A building permit is required. The city must approve ADU permits ministerially within 60 days per state law.
Vista FAQ
Can I live in a tiny home on wheels in Vista?
No, tiny homes on wheels are classified as RVs and cannot be used as permanent residences on residential lots in Vista.
What is the minimum size for a tiny home in Vista?
A junior ADU can be as small as 150 sq ft. Standard detached ADUs can be up to 1,200 sq ft.
Do I need a permit for a tiny home on a foundation?
Yes, it must be permitted as an ADU through Community Development at (760) 639-6100 and meet all building code requirements.
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