What Is California Code of Civil Procedure Section 1161?

California Code of Civil Procedure Section 1161 is the statute that defines when a tenant is “guilty of unlawful detainer” and sets the three-day notice rules a landlord has to follow before filing an eviction lawsuit for cause. It covers the at-fault grounds — unpaid rent, lease violations, nuisance, waste, and illegal use of the premises — and spells out what each notice must say and how long the tenant has to respond. Get the notice wrong and the case usually dies before it reaches trial.¹

What Section 1161 Actually Does

“Unlawful detainer” is the legal term for staying in a rental after your right to be there has ended. Section 1161 is the list: it names the specific tenant conduct that makes a continued stay unlawful and triggers the landlord’s right to go to court. Everything the statute addresses is at-fault — it is about things the tenant allegedly did or failed to do, not about a landlord’s business decision to end the tenancy for other reasons.¹

The statute pairs each ground with a notice. The notice is not a formality. It is the document the court will examine first, and small defects in it routinely sink evictions.

The At-Fault Grounds

Failure to Pay Rent

Nonpayment is the most common ground. When rent is overdue, the landlord may serve a three-day notice to pay or quit. The notice has to state the exact amount of past-due rent and give the name, phone number, and address of the person who can accept payment, along with the days and hours that person is available.¹

The amount demanded can only be rent. Late fees, utility charges, damage costs, and other non-rent amounts do not belong in a pay-or-quit notice. A notice that overstates what is owed — even by a few dollars in tacked-on fees — is invalid, and courts will dismiss the case on that ground alone.²

Lease Violations the Tenant Can Fix

If a tenant breaks a material lease term — an unauthorized pet, an unapproved sublet, exceeding occupancy limits — Section 1161 lets the landlord serve a three-day notice to cure or quit. The notice must describe the specific violation so the tenant knows exactly what to correct. If the tenant resolves the issue within the three-day window, the landlord cannot proceed with eviction on that basis.¹

Nuisance, Waste, and Illegal Use

Some conduct is serious enough that Section 1161 does not require the landlord to offer a chance to fix it. Maintaining a nuisance, committing waste that reduces the property’s value, using the premises for an illegal purpose, or an unauthorized sublet that itself breaches the lease all support a three-day notice to quit with no cure option. If the tenant remains after three days, the landlord can file suit.³

Counting the Three Days

The three-day clock excludes weekends and court holidays. A notice served late in the week will not expire as quickly as a landlord expects, and a tenant whose deadline falls on a Saturday has until the next court day to pay, cure, or move.¹

Section 1161 Is Not the Only Hurdle

For tenants who have continuously and lawfully occupied the unit for 12 months or more, California Civil Code Section 1946.2 — enacted as part of AB 1482, the Tenant Protection Act of 2019 — adds a “just cause” requirement on top of Section 1161. The written termination notice must state the specific just cause relied upon, or the eviction is invalid on its face.⁴

The at-fault grounds in Section 1946.2 overlap heavily with Section 1161: nonpayment, material lease breach, nuisance, waste, criminal activity directed at the landlord or their agents, and refusing lawful landlord access to the unit. For a covered tenancy, satisfying Section 1161’s notice rules is necessary but not sufficient; the landlord also has to point to a recognized just cause and name it in the notice.⁴

Not every rental is covered by the Tenant Protection Act. Single-family homes are generally exempt if the owner gives written notice of the exemption, and units built within the last 15 years are excluded. Where the Act does not apply, Section 1161’s requirements still do.⁴

What Happens After the Notice Expires

If the tenant does not pay, cure, or vacate within the three days, the landlord’s next step is filing an unlawful detainer complaint in superior court. The landlord must attach a copy of the termination notice to the complaint. This is a formal lawsuit, and it is the only legal way to force a tenant out in California.

Filing fees as of January 1, 2026, are $240 for claims up to $10,000, $385 for claims between $10,000 and $35,000, and $435 for claims over $35,000. Riverside, San Bernardino, and San Francisco counties charge slightly more because of local courthouse construction surcharges.⁵

After the complaint is served, the tenant has five days to respond, excluding weekends and holidays. No response means the landlord can request a default judgment. If the tenant answers, the case moves toward trial.¹

Unlawful detainer cases run on an urgent track. Once either side requests a trial date, the court must schedule it within 20 days. Extensions are rare, and when the court grants one, it can require the tenant to deposit ongoing rent with the court while the case is pending.⁶

Where Section 1161 Cases Usually Fall Apart

Defective Notice

Most Section 1161 cases that fail, fail on the notice. A pay-or-quit notice that includes late fees, utility bills, or damage charges is invalid. So is one that misstates the rent owed, fails to name a person authorized to accept payment, or was not properly served. A cure-or-quit notice that does not describe the specific violation gives the tenant nothing to correct and does not satisfy the statute. Courts throw these cases out.⁷

Accepting Rent After the Notice Expired

If a landlord accepts rent after the three-day period has run, they may have waived the 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. The landlord then has to start the notice process over.⁷

Habitability

A tenant facing a nonpayment case can raise the landlord’s failure to maintain the unit as a defense. No heat, water leaks, broken locks, pest infestations, and similar conditions, when they are not caused by the tenant or their guests, go to habitability. A tenant who made urgent repairs and properly deducted the cost from rent can also use that as a defense.⁷

Retaliation

Civil Code Section 1942.5 bars a landlord from terminating a tenancy, raising rent, or reducing services within 180 days after a tenant complains to the landlord about habitability, files a complaint with a government agency about the property’s condition, or participates in a proceeding where habitability was at issue. Inside that window, an eviction attempt is presumed retaliatory and the landlord has to prove otherwise. The protection applies as long as the tenant was current on rent at the time of the complaint.⁸

What Section 1161 Does Not Cover

Section 1161 is about at-fault grounds. No-fault terminations — owner move-in, withdrawal of the unit from the rental market under the Ellis Act, government or court orders to vacate, demolition or substantial remodel — live in Civil Code Section 1946.2 and carry different notice periods (30 or 60 days) and a relocation assistance obligation equal to one month’s rent or a waiver of the final month’s rent.⁴

Terminations of month-to-month tenancies that are not based on wrongdoing fall under Civil Code Section 1946.1: 60 days’ written notice if the tenant has lived in the unit a year or more, 30 days if less. A narrower 30-day rule applies when the owner has entered escrow to sell to a buyer who intends to live in the unit, available once per tenancy and only within 120 days of escrow opening.⁹

Section 1161 also does not authorize self-help. A landlord cannot change the locks, remove doors or windows, shut off utilities, or remove a tenant’s belongings to force them out. Civil Code Section 789.3 makes those actions illegal and exposes the landlord to the tenant’s actual damages plus up to $100 per day of violation, with a minimum of $250 per violation.¹⁰

And winning a Section 1161 case does not, by itself, let the landlord retake the unit. After judgment, the landlord has to obtain a writ of possession, which directs the sheriff or marshal to carry out the removal. The writ gives the tenant five days after service to vacate voluntarily; if they remain, the sheriff returns to remove all occupants and restore possession to the landlord. Personal property left behind can be reclaimed within 15 days after the tenant pays reasonable storage costs.¹¹

One last boundary worth knowing: many California cities, including Los Angeles, San Francisco, Oakland, Berkeley, and San Jose, add local rent stabilization rules that can restrict eviction grounds further, require larger relocation payments, or impose extra procedural steps. If the unit is in one of those cities, Section 1161 is the floor, not the ceiling, and the local rent board is the place to check what else applies.

1
California Legislative Information. California Code of Civil Procedure 1161 – Unlawful Detainer
2
Judicial Branch of California. Types of Eviction Notices Tenants
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Judicial Branch of California. Types of Eviction Notices
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California Legislative Information. California Civil Code 1946.2
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Judicial Branch of California. Superior Court of California Statewide Civil Fee Schedule Effective January 1, 2026
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California Legislative Information. California Code of Civil Procedure Section 1170.5
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Judicial Branch of California. Eviction Defenses
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California Legislative Information. California Civil Code 1942.5
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California Legislative Information. California Civil Code 1946.1
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California Legislative Information. California Civil Code 789.3
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California Legislative Information. California Code of Civil Procedure 715.010