Rent Control: Altadena vs Castaic
How do rent control rules compare between Altadena, CA and Castaic, CA?
Altadena and Castaic have similar restriction levels.
Altadena, CA
Los Angeles County
The LA County Rent Stabilization & Tenant Protections Ordinance (RSTPO) caps annual rent increases in covered Altadena multi-unit buildings (built before Feb 1, 1995) at 3% or 60% of CPI, whichever is lower (effective 2025).
View full Altadena rules →Castaic, CA
Los Angeles County
Unincorporated LA County has its own Rent Stabilization Ordinance (RSO) effective April 1, 2020, with amendments effective January 1, 2025. Fully covered units (2+ units, pre-Feb 1995) have rent increase caps. Partially covered units have just-cause only protections.
View full Castaic rules →Key Facts Comparison
| Fact | Altadena | Castaic |
|---|---|---|
| Authority | LA County RSTPO (Ch. 8.52) | - |
| Cap (2025) | 3% or 60% CPI (lower) | - |
| Coverage | Multi-unit built pre-Feb 1, 1995 | - |
| Small Landlord Bonus | +1% | - |
| Admin Agency | LA County DCBA | - |
| RSO | - | Effective April 1, 2020 |
| Full Coverage | - | 2+ units, pre-1995, rent caps |
| Partial Coverage | - | Just-cause eviction only |
| 2025 Update | - | Stricter rent increase limits |
Highlighted rows indicate differences between cities.
Altadena FAQ
Is Altadena under rent control?
Yes — covered multi-unit rentals built before Feb 1, 1995 are limited to 3% (or 60% of CPI) annual increases under the LA County RSTPO.
Castaic FAQ
How much can my landlord raise rent in unincorporated LA County?
Under the RSO, annual increases are capped at a percentage set by the county (typically 3-4%, tied to CPI). This applies to units built before February 1, 1995, in unincorporated areas. Check current allowed increases at dcba.lacounty.gov.
Is my rental unit covered by rent control?
If it's in unincorporated LA County and was built before February 1, 1995, it's likely covered by the RSO. Single-family homes (unless corporate-owned), post-1995 units, and owner-occupied duplexes are exempt. Contact (800) 593-8222 to verify.
What if my landlord raises rent more than allowed?
File a complaint with the LA County Department of Consumer and Business Affairs at (800) 593-8222 or dcba.lacounty.gov. You may be entitled to a refund of excess rent paid plus interest.
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