California Code of Civil Procedure Section 1161 is the state’s unlawful detainer statute — the law that defines when a tenant is unlawfully holding over in a rental and sets out the notices a landlord must serve before going to court to remove them. It lists the grounds that make a tenant “guilty of unlawful detainer,” specifies the three-day notices tied to each ground, and works alongside California Civil Code Section 1946.2 (the Tenant Protection Act) to control how residential evictions proceed. Get any step under Section 1161 wrong and the eviction can be dismissed.
What Section 1161 Actually Does
Section 1161 sits inside Chapter 4 of the Code of Civil Procedure, which governs unlawful detainer actions. Unlawful detainer is the legal term for staying in a rental unit after your right to be there has ended. The statute is what turns a private landlord-tenant dispute into a court case: it defines the conduct or circumstances that make a tenant subject to eviction, and it fixes the notice a landlord must give before filing suit.1California Legislative Information. California Code of Civil Procedure 1161 – Unlawful Detainer
The grounds fall into a handful of categories: unpaid rent, breach of a lease term the tenant could fix, and conduct serious enough that no cure is allowed, such as nuisance, waste, illegal activity on the premises, or unauthorized subletting. Each ground carries its own notice, and the notices are short.
The Three-Day Notices Under Section 1161
Every eviction under Section 1161 begins with a written notice. The three days exclude weekends and court holidays, and the notice must match the ground being asserted. Three versions exist, and they are not interchangeable.
Three-Day Notice to Pay Rent or Quit
Used when rent is overdue. The notice must state the exact amount of past-due rent and include the name, phone number, and address of the person authorized to accept payment, along with the days and hours that person is available. The notice can demand rent and only rent. Late fees, utility charges, damage costs, and other non-rent amounts cannot be added. A notice that overstates what is owed, even by a few dollars, is invalid.1California Legislative Information. California Code of Civil Procedure 1161 – Unlawful Detainer
Three-Day Notice to Cure or Quit
Used for lease violations the tenant can fix, such as keeping an unauthorized pet, exceeding occupancy limits, or subletting without permission. The notice must describe the specific breach so the tenant knows what to correct. If the tenant fixes the problem within the three-day window, the landlord cannot proceed with eviction on that basis.2Judicial Branch of California. Types of Eviction Notices Tenants
Three-Day Notice to Quit
Used when the conduct is serious enough that no cure is offered: maintaining a nuisance, committing waste that reduces the property’s value, using the premises for illegal purposes, or subletting in violation of the lease. The tenant has three days to leave. If the tenant remains, the landlord can file for eviction with no obligation to give the tenant a chance to fix things.3Judicial Branch of California. Types of Eviction Notices
Just Cause Sits on Top of Section 1161
Section 1161 tells you what a landlord must do procedurally. It does not, by itself, tell you whether the landlord has a lawful reason to end the tenancy in the first place. That threshold comes from California Civil Code Section 1946.2, enacted as part of AB 1482 (the Tenant Protection Act of 2019). Once a tenant has continuously and lawfully occupied a covered unit for 12 months or more, the landlord must state a specific “just cause” in any termination notice. Without that stated cause, the eviction is invalid on its face.4California Legislative Information. California Civil Code 1946.2
Just cause splits into two categories. At-fault grounds — nonpayment, lease breach, nuisance, criminal activity directed at the landlord, refusing lawful access — largely mirror the conduct Section 1161 already treats as unlawful detainer. No-fault grounds cover situations where the tenant has done nothing wrong but the landlord has a legitimate reason to reclaim the unit, such as an owner or immediate family member moving in, withdrawal from the rental market under the Ellis Act, or a government or court order to vacate. No-fault evictions require the landlord to pay one month’s rent in relocation assistance or waive the final month’s rent, and they use the longer notice periods in Civil Code Section 1946.1 — 30 days if the tenant has been there less than a year, 60 days if a year or more.4California Legislative Information. California Civil Code 1946.25California Legislative Information. California Civil Code 1946.1
Not every rental unit falls under the just cause rules. Single-family homes are generally exempt if the owner provides written notice of the exemption, and units built within the last 15 years are excluded. Where 1946.2 does apply, though, Section 1161 alone is not enough — the notice must state a recognized just cause or the case fails.4California Legislative Information. California Civil Code 1946.2
From Notice to Court
If the tenant doesn’t pay, doesn’t cure, or doesn’t leave within the three days, the landlord’s next step is filing an unlawful detainer complaint in superior court. This is a formal lawsuit, not an administrative process, and it’s the only legal way to force a tenant out in California. The landlord must attach a copy of the termination notice to the complaint.1California Legislative Information. California Code of Civil Procedure 1161 – Unlawful Detainer
Once served, the tenant has five days to file a response, excluding weekends and holidays. If no response comes in, the landlord can request a default judgment. If the tenant does respond, the case moves toward trial. California treats these cases as urgent: once either side requests a trial date, the court must schedule it within 20 days, and extensions are rare. When a court does grant an extension, it can require the tenant to deposit ongoing rent payments with the court while the case is pending.6California Legislative Information. California Code of Civil Procedure Section 1170.5
How Section 1161 Cases Get Dismissed
The strict form the statute demands is also its weakest link for landlords. A few defenses come up again and again.
Defective Notice
This is where most cases fall apart. If the pay-or-quit notice demands the wrong amount, tacks on late fees or utilities, omits the name of the person who can accept payment, or wasn’t properly served, the entire eviction can be dismissed. Same with a cure-or-quit notice that doesn’t identify the specific violation clearly enough for the tenant to correct it.7Judicial Branch of California. Eviction Defenses
Landlord Accepted Rent After the Notice Expired
If a landlord accepts a rent payment after the three-day period has run, they may have waived their right to proceed on that notice. Even accepting a partial payment or creating the impression that payment was accepted can be enough to invalidate the case.7Judicial Branch of California. Eviction Defenses
Uninhabitable Conditions
If the landlord failed to keep the unit safe and livable — no heat, water leaks, broken locks, pest infestations not caused by the tenant — habitability can be raised as a defense against a nonpayment eviction. California also allows tenants who made urgent repairs and properly deducted the cost from rent to use that as a defense.7Judicial Branch of California. Eviction Defenses
Discrimination
A tenant who believes the eviction is motivated by race, sex, religion, national origin, disability, sexual orientation, number of children, or receipt of public assistance can raise discrimination as a defense. Both the federal Fair Housing Act and California’s Fair Employment and Housing Act apply. A tenant with a disability who requested a reasonable accommodation and was denied may have a particularly strong defense.7Judicial Branch of California. Eviction Defenses
Retaliation
Section 1161 sets the procedure, but Civil Code Section 1942.5 bars a landlord from using it in retaliation. Within 180 days after a tenant complains about habitability, files a report with a government agency about the property’s condition, or participates in a related legal proceeding, an eviction attempt is presumed retaliatory, and the landlord bears the burden of proving otherwise. Threatening to report a tenant or their associates to immigration authorities also counts as prohibited retaliation.8California Legislative Information. California Civil Code 1942.5
What Section 1161 Does Not Cover
Section 1161 governs the three-day notice grounds and unlawful detainer itself. It does not authorize longer-notice terminations, which come from Civil Code Section 1946.1 (30- and 60-day notices for no-fault situations). It does not permit self-help eviction. Civil Code Section 789.3 makes it illegal for a landlord to change the locks, remove doors or windows, shut off utilities, or remove a tenant’s belongings to force them out, and a landlord who does so is liable for actual damages plus up to $100 per day of violation, with a minimum award of $250 per violation.9California Legislative Information. California Civil Code 789.3
Local ordinances also matter. Cities including Los Angeles, San Francisco, Oakland, Berkeley, and San Jose maintain rent stabilization ordinances that may restrict eviction grounds further, require larger relocation payments, or impose procedural requirements beyond the statewide baseline. If your unit is in one of those cities, the local rent board or housing department is the place to check before relying on Section 1161’s procedure alone.