How to Challenge a Rent Increase Above 10% Under California’s Tenant Protection Act (AB 1482) in Los Angeles County
A rent increase above 10% in Los Angeles County is often unlawful for many AB 1482–covered rentals because California’s Tenant Protection Act generally caps annual increases at 5% + local CPI, up to a maximum of 10%. In practice, a landlord raising rent more than that may violate state law unless the unit is exempt or the increase is otherwise justified. This article explains how to check coverage, calculate the cap, preserve evidence, and formally challenge an over-cap increase.
Understanding AB 1482’s rent cap in Los Angeles County
California’s Tenant Protection Act of 2019 (AB 1482), codified primarily at Civil Code section 1947.12, limits rent increases for many residential tenants statewide, including in Los Angeles County. The core rule is a ceiling on rent increases of 5% + the regional Consumer Price Index (CPI) over any 12-month period, not to exceed 10%. If a landlord demands a rent increase above that limit for a covered unit, the increase may be unlawful and challengeable.
Importantly, AB 1482 is a statewide baseline. Some properties may also be subject to local Los Angeles rent-stabilization rules (for example, the City of Los Angeles Rent Stabilization Ordinance (RSO) for many older multi-family buildings), which can be more restrictive than AB 1482. When a local ordinance applies, the tighter rule often controls.
What does “above 10%” mean under AB 1482?
The 10% figure is the statutory maximum cap in any 12-month period for covered units. Even if 5% + CPI would mathematically exceed 10%, AB 1482 generally does not allow increases above 10% total within that period.
Also note that landlords sometimes “stack” increases (e.g., 6% now, 6% later). AB 1482 generally looks at the total increase over any rolling 12-month period. Multiple increases can still violate the cap when combined.
Step 1: Confirm whether your rental is covered or exempt
The first legal question is coverage. AB 1482 does not apply to every property. A rent increase above 10% is only actionable under AB 1482 if the unit is subject to the statute’s rent cap.
Common properties that are often covered
Many apartments and multi-family rentals in Los Angeles County are covered, particularly older buildings that are not otherwise exempt. Coverage frequently applies to rentals that are:
- Residential (not commercial), and
- Not newly constructed within the last 15 years (AB 1482 includes a rolling “new construction” exemption), and
- Not a separately alienable single-family residence exempted by statute (see below), and
- Not already governed by a local rent control scheme that replaces the AB 1482 cap with a tighter local cap.
Key exemptions landlords rely on (and how tenants can vet them)
1) New construction (generally within the last 15 years). AB 1482 typically exempts housing built within the prior 15 years (a rolling exemption). Tenants can verify build year through county assessor records, city building records, or public listing histories.
2) Certain single-family homes and condos. Some single-family residences and condominiums can be exempt if they are not owned by a corporation, REIT, or LLC with at least one corporate member, and if the landlord provided the required AB 1482 exemption notice to the tenant. Tenants should ask: Who is the legal owner on the deed? Was the required exemption language provided in the lease or by proper written notice?
3) Duplex where the owner occupies one unit. In some cases, an owner-occupied duplex can be exempt. Confirm whether the owner actually occupies the other unit as their principal residence.
4) Affordable housing and certain deed-restricted units. Income-restricted units may be governed by separate regulatory agreements, which can change how increases are calculated.
Critical practical point: Even when a unit could be exempt, a landlord may lose the ability to claim the exemption if they failed to provide the statutorily required exemption disclosure in the rental agreement or in a legally compliant notice. This is a common dispute point in litigation and settlement negotiations.
Step 2: Calculate the lawful maximum rent increase (don’t assume “10%” is always allowed)
Many tenants hear “AB 1482 allows 10%” and stop there. That can be a costly misunderstanding. The cap is typically 5% + local CPI, with 10% as the absolute maximum. In lower-inflation periods, the lawful cap may be below 10%.
How the calculation works in real life
AB 1482 generally permits increases up to 5% plus the percentage change in CPI for the applicable region, measured over a specific period. The “applicable CPI” can be a technical question (including which CPI series applies and which months are used). Attorneys often confirm the correct CPI figure for the relevant Los Angeles-area index and the date the increase takes effect.
Example 1 (single increase over the cap)
A tenant pays $2,500/month. The landlord serves notice raising rent to $2,800 (a 12% increase). If the unit is covered, that is above the statutory maximum of 10% and is likely unlawful under AB 1482.
Example 2 (stacked increases)
A tenant pays $2,000/month. The landlord raised rent 6% six months ago (to $2,120). Now the landlord serves another 6% increase (to $2,247.20). Over 12 months, the combined increase is more than 10%. Even if each single increase looks “reasonable,” the aggregate can violate AB 1482.
Example 3 (cap is below 10%)
If 5% + CPI equals 8% for the relevant period, a 9.5% increase may still be unlawful for a covered unit—even though it is under 10%—because the cap is the lower number (5% + CPI) unless that number exceeds 10%.
Step 3: Check whether the rent increase notice itself is legally defective
Even if the amount were arguably lawful, a landlord must generally comply with California’s notice rules for rent increases. Defective notice can be an independent basis to challenge an increase or delay its effective date.
Notice timing: 30 days vs. 90 days
Under California law, many rent increases of more than 10% (in total within a 12-month period) require 90 days’ written notice, while smaller increases often require at least 30 days’ notice. A landlord demanding an immediate over-10% increase with only 30 days’ notice may face both AB 1482 and notice-compliance problems.
What to look for in the notice
Common issues include:
- Incorrect effective date (not enough lead time)
- Math errors in the base rent or percentage increase
- Failure to specify the new rent amount clearly
- Improper service (e.g., not delivered as required by statute or lease)
- Trying to re-label rent as “fees” or “charges” to evade the cap
Step 4: Gather evidence before you dispute the increase
Challenging a rent increase is easier when the documentation is organized. Before sending a dispute letter or withholding any portion of rent (a decision that can carry eviction risk), collect:
- Your lease, addenda, and any renewal documents
- All rent increase notices (keep envelopes, emails, screenshots, and timestamps)
- Proof of rent payments (bank statements, receipts, money order stubs)
- Any AB 1482 exemption notice language (or proof it was never provided)
- Property ownership information (county recorder, assessor, or title report)
- Building age information if new construction is claimed (permits, public records)
- Any communications where the landlord explains the reason for the increase
Step 5: Dispute the rent increase in writing (and keep paying the undisputed amount)
A clear written dispute can prevent misunderstandings and creates a paper trail if the landlord escalates to a notice to pay or quit or an unlawful detainer (eviction) case. Many tenants choose to continue paying the prior lawful rent amount while contesting the excess—however, that strategy can still trigger eviction proceedings, so legal advice is strongly recommended before taking a hard line.
What a strong dispute letter typically includes
- The address, tenancy start date, and current rent
- The date and terms of the rent increase notice
- A statement that the unit is believed covered by AB 1482 and that the demanded increase exceeds Civil Code § 1947.12 limits
- A request for the landlord to identify any claimed exemption and provide supporting documentation
- A proposed lawful rent amount (if you can calculate it) and a request for a corrected notice
- A deadline to respond (e.g., 7–14 days) and a statement reserving rights
Step 6: Anticipate landlord defenses—and how attorneys challenge them
Landlords disputing AB 1482 challenges often raise predictable defenses. Knowing them helps you and your attorney focus on the key factual issues.
Defense: “The property is exempt because it’s a single-family home”
Response strategies may include confirming whether the owner is a corporate entity or LLC with a corporate member (which can defeat the exemption), and whether
