Tiny Homes: Fremont vs Hayward
How do tiny homes rules compare between Fremont, CA and Hayward, CA?
Fremont and Hayward have similar restriction levels.
Fremont, CA
Alameda County
Fremont allows tiny homes as ADUs if built to California Residential Code on a foundation. Tiny homes on wheels are regulated as RVs and generally cannot be primary dwellings.
View full Fremont rules →Hayward, CA
Alameda County
Hayward allows tiny homes as ADUs on foundations. Tiny homes on wheels are restricted; Movable Tiny Houses are allowed as JADU equivalents in some cases.
View full Hayward rules →Key Facts Comparison
| Fact | Fremont | Hayward |
|---|---|---|
| Fixed Tiny Home | ADU if CRC-compliant | - |
| Minimum Size | 150 sq ft | - |
| Foundation | Required for ADU | - |
| THOW (RV) | Cannot be primary dwelling | - |
| Manufactured Home | Allowed with HUD certification | - |
| On foundation | - | Allowed as ADU |
| On wheels | - | Not as permanent home |
| RV parks | - | Only licensed stays |
| HCD modular | - | Allowed as ADU |
| Review | - | 60-day ministerial |
Highlighted rows indicate differences between cities.
Fremont FAQ
Can I live in a tiny home on wheels in my Fremont driveway?
No. Long-term habitation of RVs and trailers on residential property is prohibited. Short stays by guests (under 7 days) may be allowed. Contact Fremont Code Enforcement for specific rules during family emergencies.
What is the smallest ADU Fremont will permit?
The California Residential Code requires a minimum 150 square feet for a studio dwelling with efficiency kitchen and full bath. Some jurisdictions allow smaller MTH, but Fremont requires CRC compliance which enforces the 150 sq ft floor.
Hayward FAQ
Can I live in my RV in my driveway?
No. Hayward prohibits full-time residency in RVs on private residential property.
Is a park model OK as an ADU?
Only if HCD-certified and installed on a permanent foundation with full ADU permits.
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