TL;DR
Santa Ana RSO covers pre-February-1995 multi-units (CO threshold). Cap is 80% of CPI with a 3% ceiling — much stricter than AB 1482. Just-cause from day one, not after 12 months. Mandatory Rent Registry with per-unit annual fee. $10,000 per violation harassment penalties.
Coverage — and the threshold owners get wrong
The Santa Ana RSO covers residential units in multi-unit buildings of two or more where the Certificate of Occupancy issued on or before February 1, 1995. The threshold owners get wrong: it's the building's CO date, not the owner's acquisition date. A 1993 duplex you bought in 2023 is RSO-covered. A 1996 duplex you bought in 2019 is not.
Exempt: single-family homes, individually-owned condos, post-February-1995 construction, hotels and transient lodging, dorms and school-operated housing, government-owned subsidized housing under separate frameworks. SFRs and individual condos generally fall under AB 1482 instead.
The cap, in detail
80% of CPI with a 3% absolute ceiling. The math: if CPI runs at 4%, the calculation is 0.80 × 4% = 3.2%, then the 3% ceiling controls. If CPI runs at 2%, the calculation is 0.80 × 2% = 1.6%, and the cap is 1.6% (the ceiling doesn't bind). In high-inflation years the 3% ceiling is the operative number; in low-inflation years the 80%-of-CPI math is.
Either way, the Santa Ana cap is meaningfully stricter than AB 1482's 5% + local CPI in normal years. Owners doing the AB 1482 math on a Santa Ana RSO unit are overshooting the lawful cap.
Just-cause from day one
AB 1482's just-cause kicks in at 12 months. The Santa Ana RSO's just-cause kicks in at day one of tenancy. There's no "first-year for convenience" window. Every termination of a covered tenancy — first month, sixth month, fifth year — requires a statutory just cause.
The Rent Registry
Mandatory annual registration of every RSO-covered unit with the city's Rent Stabilization Program. Per-unit fee applies. Registration captures current rent, tenancy start dates, and basic unit data — the city uses it for compliance audits.
Non-registration bars enforcement
An owner who fails to register cannot lawfully serve a rent increase notice on a covered unit. The Registry is the gatekeeper. Catching up on missed registration years includes back fees and penalties.
Relocation assistance for no-fault terminations
The relocation schedule scales by tenure: longer tenancy means a larger relocation payment. Additional uplift applies for senior tenants, disabled tenants, and households with minor children. Payment is due at or before service of the notice — not at move-out.
Verify the current schedule on the city's rent program page before serving any no-fault notice. Under-paying is the most common SB 567 / RSO compliance failure on OC properties.
The $10,000 harassment penalty
The RSO's Anti-Harassment provisions carry civil penalties up to $10,000 per violation. Conduct that triggers liability: unlawful entry under §1954, refusal to make required repairs, frivolous notice service, threats, service interference (utilities, parking, mailbox access), and retaliation patterns. Tenants have a private right of action with attorney's fees. Pattern claims compound across affected tenants.
Common questions — Santa Ana RSO
What does the Santa Ana RSO cover?
Residential units in multi-unit buildings of two or more where the CO issued on or before February 1, 1995.
How much can I raise rent under the RSO?
80% of CPI with a 3% ceiling. Stricter than AB 1482 in nearly every year.
When does just-cause apply?
From day one of tenancy on RSO-covered units. Not the AB 1482 12-month threshold.
What is the Rent Registry?
Mandatory annual registration of every RSO-covered unit. Per-unit fee. Non-registration bars rent adjustments and some terminations.
What does an Anti-Harassment violation cost?
Up to $10,000 per violation. Tenant private right of action with attorney's fees. Pattern claims stack.
CA Landlord Laws