How Much Can a Landlord Raise Rent in California? AB 1482 Math

“How much can my landlord raise my rent?” has a genuinely different answer in California than almost anywhere else, because since 2020 the state has had a statewide rent cap: 5% plus regional inflation, never more than 10%, per 12 months — for covered units. The entire dispute usually reduces to two questions: is the unit covered, and what does the math say. This guide answers both, verified against the codified statutes (Civ. Code § 1947.12, § 1946.2, § 827).

Note the contrast with this site’s Texas guides: Texas prohibits rent control statewide, so the Texas playbook is negotiation. California’s playbook is arithmetic plus enforcement — a different statute, a different strategy, and a reminder of why this site never recycles one state’s law for another. General legal information, not legal advice.

The Coverage Question, Answered Properly

Everything depends on whether AB 1482 covers your unit, so work it like a checklist:

• Covered (typically): apartment buildings and multi-unit properties first occupied more than 15 years ago; single-family homes owned by corporations, REITs, or LLCs with a corporate member; duplexes where the owner doesn’t live on site.
• Exempt (typically): buildings first certified for occupancy within the last 15 years — note this is a rolling window, so coverage grows every year; single-family homes and condos owned by individuals if the lease contains the statutory exemption language (no notice in the lease → the exemption may fail); owner-occupied duplexes; deed-restricted affordable housing (which has its own rules); dorms; some hotels.
• Special case — declared emergencies: California’s anti-price-gouging law (Penal Code § 396) caps increases at 10% during declared states of emergency even for AB 1482-exempt units. After major fires this rule has covered entire metro areas for extended periods.

The single-family exemption trips up both sides constantly: the owner must be a natural person (not an LLC with corporate members, not a REIT) and the required exemption notice must appear in the lease. Missing either prong means the home is covered by the cap despite being a house.

The Math, With the CPI Wrinkle

The formula is 5% + the percentage change in the regional CPI, capped at 10% total. Three practical notes:

1. “Regional” means your metro. Different CPI figures apply in the LA, SF, San Diego, and Riverside areas, with a state figure elsewhere. Your city or county housing page, or the Berkeley Rent Board’s AB 1482 page, points to the current numbers.
2. The figure updates annually (applied from August 1). An increase letter is measured against the CPI figure in force on its effective date — last year’s allowance doesn’t carry over.
3. Two-increase limit. Even within the cap, no more than two increases in any 12-month period, and the total across them still can’t exceed the cap.

In high-inflation years the formula hits the 10% ceiling; in normal years it lands around 7–9%. Either way, a quoted increase above 10% on a covered unit is unlawful on its face.

Why Just Cause Is Half the Law

The cap would be toothless if a landlord could respond to your objection with “then we won’t renew.” Section 1946.2 closes that door: after 12 months of occupancy, covered tenancies can only end for listed reasons — at-fault causes like nonpayment or breach, or no-fault causes like a genuine owner move-in, withdrawal from the market, or substantial remodel (no-fault terminations generally require relocation assistance of one month’s rent). Enforcement legislation effective in 2024 (SB 567) tightened the owner move-in and remodel provisions specifically because they were being abused as cap workarounds, and added damages exposure for violations. If a rent-cap dispute is followed by a suspicious “my cousin is moving in” notice, that sequence itself is evidence — date-stamp it.

The City Layer

AB 1482 explicitly yields to stricter local rules. If your unit is in Los Angeles (RSO), San Francisco, Oakland, Berkeley, Santa Monica, East Palo Alto, or another rent-stabilized city, the local cap for covered units is often far lower than 5% + CPI — sometimes 3% or less — and local rent boards provide free counseling and formal petition processes. Order of operations: check the local ordinance first, fall back to AB 1482, and remember § 827’s notice rules apply everywhere, exempt or not.

The Five Most Common Mistakes

1. Paying the quoted number without running the formula. One minute of arithmetic against the current regional CPI is the whole defense.
2. Assuming a house can’t be covered. Corporate-owned single-family rentals and leases missing the exemption notice are covered — check the deed and the lease before conceding.
3. Ignoring the notice clock. Short notice moves the effective date even for lawful increases; over-10% increases need 90 days everywhere.
4. Missing the local ordinance. Objecting under AB 1482 when your LA unit is under the stricter RSO is leaving money on the table.
5. Moving out instead of asserting just cause. On covered units, a retaliatory non-renewal isn’t a lawful answer to a cap objection — know § 1946.2 before you self-evict from a protected tenancy.

Recovering an Overcharge, Step by Step

If you’ve already been paying an unlawful increase, the money is recoverable — but do it methodically:

1. Reconstruct the ledger. Every payment above the lawful cap, by month, with the applicable CPI figure for each period noted. A simple spreadsheet with statute-based math reads as credible; a lump-sum demand reads as a guess.
2. Demand in writing first. A letter with the ledger attached, citing § 1947.12, requesting a refund or rent credit within 30 days. Many property managers refund on paper alone — an unlawful increase is a liability their owners don’t want compounding.
3. Use the free venue that fits. Rent-stabilized cities: file with the rent board, which can order refunds administratively. Elsewhere: small claims up to $12,500, with your ledger as Exhibit A.
4. Mind the clock. Recovery claims have limitation periods — act in months, not years, and get advice from a local tenant organization or attorney if the overcharge spans multiple CPI periods.

And a structural note worth knowing: because the cap resets against lawful rent, an uncorrected illegal increase compounds — next year’s 5%

• CPI gets applied to an inflated base. Correcting the record now protects every future year of the tenancy, which is why even a small monthly overcharge is worth the letter.

What to Do the Day a Notice Arrives

The practical sequence, compressed into something you can act on in an evening rather than a weekend:

Hour one — photograph and date everything. The notice itself, the envelope or the portal screenshot with its timestamp, and your current lease showing the existing rent. Notices get revised and re-sent, and the version you received first is the one that governs the notice-period math.

Hour two — settle the coverage question. Building age, unit count, owner type, and whether the lease contains the single-family exemption notice. If you can’t resolve it from your own documents, your city’s housing department or rent board will usually answer by phone faster than you can research it, and their answer carries weight in later correspondence.

Hour three — run the two calculations. The AB 1482 cap (5% + regional CPI, ceiling 10%) against the quoted increase, and the § 827 notice period (30 days at 10% or less, 90 days above) against the effective date on the notice. Either one being wrong gives you something concrete to write about.

Then write, once, calmly. A single email that states the covered status, shows the math, and asks for a corrected notice resolves a large share of these disputes without escalation — because in most cases the overage is a property manager applying a template rather than a deliberate attempt to overcharge. Keep the tone that of someone who has simply done the arithmetic, because that is exactly what you have done.

Quick Answers for Skimmers

• The cap: 5% + regional CPI, max 10%, per 12 months, max two increases (§ 1947.12).
• Coverage: most 15+ year-old multifamily; big exemptions for new construction and individually-owned single-family homes with proper lease notice.
• Notice: 30 days (≤10%), 90 days (>10%) — § 827.
• Backstop: just-cause eviction protection after 12 months (§ 1946.2); emergencies trigger 10% anti-gouging caps even for exempt units.
• Sunset: the law runs through January 1, 2030.

Related Guides on This Site

• California security deposit return: the 21-day rule — the companion California guide, with the § 1950.5 playbook.
• How much can a landlord raise rent in Austin, Texas? — the opposite legal regime: no rent control, negotiation-driven.

Official Sources Used in This Guide

• Cal. Civil Code § 1947.12 (rent cap)
• Cal. Civil Code § 1946.2 (just cause)
• Cal. Civil Code § 827 (notice periods)
• SB 567 (2023) — enforcement amendments
• Berkeley Rent Board — AB 1482 overview