LARSO Failure-to-Register Defense to Eviction (Los Angeles)

Every LARSO-covered rental unit in the City of Los Angeles must be registered annually with the LA Housing Department under LAMC § 151.05. Registration requires an annual fee. A landlord whose registration has lapsed cannot legally collect rent during the lapse and cannot legally pursue eviction during the lapse. Civil Code § 794.4(B), enacted in recent legislation, makes failure-to-register a complete affirmative defense in unlawful detainer.

This single defense is one of the most reliable in LA tenant practice. A meaningful percentage of LA City rental buildings have lapsed registrations at any given time, particularly buildings owned by smaller landlords, recently-acquired buildings where the new owner hasn’t addressed registration, and buildings where ownership has changed hands without registration transfer. The defense applies regardless of how strong the landlord’s underlying eviction grounds may be. A lapsed registration ends the case.

We are a tenant-only firm. Failure-to-register is the first thing we check on any LA City eviction case.

What LARSO registration requires

LAMC § 151.05 requires each landlord of a LARSO-covered unit to register annually with LAHD. Registration involves submitting unit and tenant information and paying the annual registration fee. The fee is split between the landlord and the tenant, the landlord may pass through up to the tenant’s portion in monthly rent. LAHD maintains a public database of registered units, lookup by address is available through the LAHD portal.

Registration must be current on the date the eviction notice is served and on the date the unlawful detainer is filed. A landlord who registers AFTER serving the notice but before filing has not cured the defect, the notice was invalid when served. A landlord who registers AFTER filing has not cured the defect, the lawsuit was invalid when filed. The cure requires re-serving a new notice and re-filing after registration is current, which gives the tenant a substantial procedural reset.

The substantive effect of lapsed registration

LAMC § 151.05(A) prohibits a landlord from collecting rent on a unit not in compliance with the registration requirement. CC § 794.4(B) extends that prohibition to the eviction process: during the lapse, the landlord cannot maintain an unlawful detainer for nonpayment of rent (because the rent was not legally due) or for any other ground (because the underlying tenancy obligations are suspended).

The defense is broader than it sounds. A landlord can lose on this ground even if the rent was actually paid late, even if the tenant violated the lease, even if a qualifying just cause genuinely exists. The registration defect cures all of those, the case fails on its face. The landlord’s only path forward is to bring registration current, wait the necessary period, serve a new notice based on a NEW cause that arose after registration was cured, and start over. That cycle often takes months and frequently changes the economics of the case enough that the landlord drops it.

How to check registration status

The LAHD portal is the source of truth. Searches by property address return the registration status, the registered owner, and the registration history. A status of “current,” “lapsed,” or “not registered” appears on the lookup. For buildings recently acquired by a new owner, the registration may show under the prior owner’s name, that’s a defective registration for current-owner purposes and supports the defense.

If the LAHD portal shows current registration, the analysis continues to the secondary registration requirements: were the per-unit registration fees paid? Were tenant-specific filings made for any units added or changed during the year? Is the registered ownership accurate? Even a “current” registration that contains substantive defects can fail the LAMC § 151.05 requirement.

Pleading and proving the defense

The defense gets pleaded in the Answer (Form UD-105, Item 3h or 3u with specific reference to LAMC § 151.05 and CC § 794.4(B)). The proof is documentary, the LAHD registration record, the dates of notice and filing, and any pass-through-fee receipts that demonstrate the landlord was collecting (or failing to collect) the registration pass-through. At trial, the LAHD record is usually conclusive, landlords rarely produce evidence sufficient to overcome the database showing.

A demurrer is also viable if the landlord’s Complaint attaches the LAHD-required registration documentation as an exhibit and the lapse is apparent on its face. More commonly, the defense develops through discovery: a Request for Production of registration records and pass-through fee records, an interrogatory asking for the landlord’s registration status on the date of notice service, and a request for admission about the specific dates of registration coverage.

What to do right now

• Verify LARSO coverage of your unit (multi-unit pre-1978 in City of LA).
• Check the LAHD portal for current registration status. Save a screenshot showing the lookup result with the date.
• If the registration is lapsed, this defense applies even if the underlying eviction grounds would otherwise be valid.
• Plead the defense in the Answer with specific citation to LAMC § 151.05 and CC § 794.4(B).
• File a parallel LAHD complaint to add administrative use.

Related pages

• Eviction Defense overview
• LARSO (LA Rent Control) — Main Page
• AB 1482 Just-Cause
• Defective Notice Defense
• RSO vs LARSO vs AB 1482 Disambiguation