30-Day Notice in California: Rules, Service, and Just Cause

In California, either a landlord or a tenant can end a month-to-month rental by giving a written 30-day notice, but two big qualifications apply on the landlord’s side: once a tenant has lived in the unit for a year, the landlord owes 60 days’ notice instead of 30, and under the Tenant Protection Act the landlord usually needs a legally recognized “just cause” to end the tenancy at all after 12 months of occupancy. Tenants, by contrast, can leave a monthly tenancy on 30 days’ written notice no matter how long they have been there.

When a Landlord Can Use a 30-Day Notice

A landlord may end a month-to-month tenancy with a 30-day notice only when the tenant has lived in the unit for less than one year. At the one-year mark, the required notice period jumps to 60 days.¹

There is one narrow exception. A landlord who has opened escrow to sell the unit to an individual buyer who genuinely intends to live there for at least a year can serve a 30-day notice even on a longer-term tenant, as long as the notice is given within 120 days of escrow opening.¹

The 30-day/60-day rule sits in Civil Code 1946.1, which sometimes gets confused with the older Section 1946. Section 1946 sets the baseline that either party can end a month-to-month tenancy on 30 days’ written notice and that rent is owed through the termination date.² Section 1946.1 layers on the residency-length rule.

Just Cause Requirement After 12 Months

This is the point where most landlords go wrong. Since January 2020, California’s Tenant Protection Act (Civil Code 1946.2) has required landlords to have “just cause” before ending a tenancy once a tenant has lived in the unit continuously for 12 months. The reason has to be stated in writing on the notice itself.³

The statute recognizes two categories. At-fault reasons cover things the tenant did wrong:

Nonpayment of rent
Breach of a material lease term after written notice to cure
Nuisance or waste
Criminal activity on the property or directed at the owner
Unauthorized subletting or assignment
Refusing the landlord legally authorized entry
Illegal use of the premises

No-fault reasons cover situations where the tenant has done nothing wrong but the landlord has a recognized need:

Owner or immediate family member moving in as a primary residence for at least 12 months
Withdrawal of the unit from the rental market
A government or code compliance order requiring the unit to be vacated
Substantial remodel or demolition

Some properties fall outside the just cause requirement, including certain single-family homes and condos where the owner has given the tenant a specific written notice of the exemption, and buildings constructed within the last 15 years.³ Local ordinances in cities such as Los Angeles, San Francisco, and Oakland can impose stricter rules, and the more protective rule controls.

When a Tenant Can Use a 30-Day Notice

Tenants have the simpler rule. Regardless of how long you have lived in the unit, you can end a month-to-month tenancy with written notice at least as long as the rental period, which is 30 days for a monthly arrangement. There is no 60-day version for tenants.¹

Rent stays owed through the termination date, so lining the notice up with your rent cycle avoids paying for days you will not occupy the unit.

What the Notice Must Contain

A 30-day notice has to be specific enough to hold up in court. Include:

Full names of every adult occupant listed on the lease or known to live in the unit
Complete property address, including any unit or apartment number
The date the notice is issued
The termination date, which must be at least 30 full days after service
The just cause reason, when the landlord is required to state one under Civil Code 1946.2

Errors in names, addresses, or dates give the other side a way to challenge the notice. For a landlord, a defective notice can lead to dismissal of an unlawful detainer case and force the process to start over. The California Courts’ self-help resources offer standardized forms with fields for each required item.⁴ Sign the notice and keep a copy.

How to Serve the Notice

California law prescribes how the notice has to be delivered, and someone other than the party giving the notice should be the one who serves it. The methods come from Code of Civil Procedure 1162:⁵

Personal delivery, handing the notice directly to the other party. This is the cleanest method and the hardest to challenge.
Substituted service, leaving the notice with someone of suitable age and discretion at the person’s home or workplace when the person cannot be found, and then mailing a copy to the residence.
Post and mail, attaching the notice to a visible spot on the property and mailing a copy, used only when the person and a suitable substitute cannot be found after reasonable effort.

The server, who must be at least 18, then completes a proof of service form recording when, where, and how the notice was delivered.⁶ That document becomes the evidence that proper notice was given if an eviction case follows.

How to Count the 30 Days

The count starts the day after the notice is delivered or mailed, not the day of service itself. If the 30th day lands on a weekend or court holiday, the deadline moves to the next business day.⁷

An example: personal delivery on June 3 makes June 4 day one, and the 30-day period expires on July 3. The tenant’s last day of lawful occupancy is July 3, and the landlord can file an eviction on July 4, unless that day is a holiday, in which case filing waits until the next court day. Filing an unlawful detainer even a day early can get the case dismissed.

Retaliation Limits on Landlords

A 30-day notice cannot be used as payback against a tenant who complained about conditions, reported code violations to a government agency, or joined a tenants’ organization. Under Civil Code 1942.5, an eviction action brought within 180 days of a protected activity is presumed retaliatory, and the landlord carries the burden of showing otherwise.⁸

The same statute also prohibits threatening to report a tenant or their associates to immigration authorities. A tenant can raise retaliation as a defense in an unlawful detainer case.

What Happens When the 30 Days Run Out

Once the notice period expires, the tenant is expected to vacate, remove personal belongings, and return the keys. If the tenant stays, the landlord’s only lawful path is to file an unlawful detainer lawsuit. Self-help measures such as changing locks or shutting off utilities are not allowed.⁹

Filing fees for an unlawful detainer complaint run between $240 and $435 depending on the amount in dispute, with cases seeking only possession sitting at the low end and Riverside and San Bernardino counties adding a local surcharge.¹⁰ Unlawful detainer cases move faster than typical civil matters and often reach trial within a few weeks.

A Separate Track for Active-Duty Military

The 30-day rules above sit alongside a separate federal right for active-duty service members, mobilized reservists, and their dependents who signed the lease. Under the Servicemembers Civil Relief Act, a qualifying service member can terminate a residential lease regardless of what the lease says, either because the lease was signed before entering military service or because they received permanent change of station orders or deployment orders for at least 90 days.¹¹

The service member delivers written notice with a copy of the military orders, in person, by private carrier, by certified mail with return receipt requested, or by electronic means reasonably calculated to reach the landlord. For a monthly lease, termination takes effect 30 days after the next rent due date following delivery of notice. Rent is owed through that final date, but early termination fees and penalties are not allowed.¹¹

1
California Legislative Information. California Code CIV 1946.1 – Termination of Hiring of Residential Real Property
2
California Legislative Information. California Code CIV 1946 – Hiring of Real Property
3
California Legislative Information. California Code CIV 1946.2 – Just Cause for Termination of Tenancy
4
California Courts. Self-Help Guide to the California Courts
5
California Legislative Information. California Code CCP 1162 – Service of Notices
6
Judicial Council of California. Proof of Service – Civil
7
California Courts. Deliver the Notice
8
California Legislative Information. California Code CIV 1942.5 – Retaliatory Eviction
9
California Legislative Information. California Code CCP 1161 – Unlawful Detainer
10
Superior Court of California. Statewide Civil Fee Schedule
11
Office of the Law Revision Counsel. 50 USC 3955 – Termination of Residential or Motor Vehicle Leases