California, United States · property

How to Evict a Roommate Not on the Lease in California

Dealing with an unwanted roommate who refuses to leave is exhausting, especially when their name isn't on the rental agreement. In California, non-lease occupants often possess full tenant or lodger protections, meaning you must adhere to strict statutory procedures to remove them. Understanding your legal relationship to the roommate is the first step toward reclaiming your living space.

Roommate Legal Status Under California Law

In California, an occupant who resides in a dwelling and pays rent—or who has established residency for more than 30 days—is generally recognized as a tenant or subtenant at law, even without being named on the primary master lease. Under California law, when you are the master tenant who allowed the roommate to move in, you step into the role of a 'landlord' relative to that occupant.

California law strictly prohibits self-help evictions. Under California Civil Code § 789.3, attempting to force a roommate out by changing locks, shutting off utilities, removing entry doors, or seizing their personal property is illegal. Doing so exposes you to actual damages, statutory damages of up to $100 per day of violation, and reasonable attorney fees.

The single statutory exception to formal court evictions applies to single lodgers under California Civil Code § 1946.5 and California Penal Code § 602.3. This exception applies only if you own and personally occupy the residence, retain access to all areas, and rent out one room to exactly one individual. If you are a tenant renting the home, or if there are multiple roommates, the lodger exception does not apply, and formal eviction procedures are required.

Serving Valid Written Notice to Vacate

Before you can initiate any legal action against an off-lease roommate, you must serve a compliant written notice under California Code of Civil Procedure § 1162. Verbal demands, texts, or informal emails do not satisfy California statutory notice requirements.

The type of notice depends on the reason for removal. If the roommate failed to pay agreed-upon rent, you must serve a 3-Day Notice to Pay Rent or Quit under California Code of Civil Procedure § 1161(2). If they are committing severe waste, creating a substantial nuisance, or engaging in illegal activity on the premises, a 3-Day Notice to Quit under § 1161(4) applies.

If you are terminating a month-to-month tenancy without fault, California Civil Code § 1946.1 requires a 30-day notice if the occupant has lived there for less than one year, or a 60-day notice if they have lived there for one year or longer. Keep in mind that local rent stabilization ordinances (such as those in Los Angeles, San Francisco, or Oakland) or the California Tenant Protection Act of 2019 (Civil Code § 1946.2) may require verified 'just cause' even to end a subtenancy.

Filing an Unlawful Detainer and Enforcing the Judgment

If the notice period expires and the roommate refuses to vacate, your only lawful remedy is to file an unlawful detainer complaint in the California Superior Court of the county where the property is located under California Code of Civil Procedure § 1161. You cannot forcibly remove them yourself during this period.

Once served with the summons and complaint, the roommate generally has five court days to file a formal response under California Code of Civil Procedure § 1167. If they do not respond, you can request a default judgment. If they contest the lawsuit, the court will set a trial date. If you prevail at trial, the court issues a judgment for possession and a writ of possession.

Only the county sheriff or marshal is legally authorized to execute a writ of possession and carry out a lockout. Navigating this process requires careful recordkeeping and adherence to civil procedure. You can use Caunsel to research local eviction rules, organize notices and evidence inside a case workspace, or connect with an independent lawyer to assess your options.

Steps

• Determine the occupant's status: Identify whether they qualify as a single lodger under California Civil Code § 1946.5 or a standard subtenant subject to normal eviction rules.
• Draft the correct statutory notice: Prepare a compliant 3-day, 30-day, or 60-day notice detailing the exact grounds for termination and required dates.
• Serve the notice lawfully: Serve the written notice using personal delivery, substituted service, or posting and mailing in strict accordance with California Code of Civil Procedure § 1162, and complete a proof of service.
• File an Unlawful Detainer lawsuit: If the roommate remains after the notice period expires, file a Summons and Complaint for Unlawful Detainer in your local California Superior Court.
• Obtain a writ of possession: After obtaining a court judgment, have the clerk issue a writ of possession and schedule the physical lockout exclusively with the county sheriff.

Common mistakes

• Changing the locks or removing doors, which triggers civil liability and daily statutory fines under California Civil Code § 789.3.
• Cutting off internet, water, electricity, or gas to make the roommate uncomfortable enough to leave.
• Giving verbal notice or relying on text messages, which invalidates subsequent court eviction filings.
• Involving the master landlord before reviewing your lease, which could expose you to eviction for unauthorized subletting.
• Overlooking local just cause eviction protections that apply to master tenants removing subtenants in rent-controlled California cities.

Questions people ask

Can I evict my roommate if our landlord doesn't know they live here?

As the master tenant, you can legally evict your subtenant through court proceedings, but doing so creates substantial risk. If your primary lease prohibits unauthorized occupants or subletting, starting a public court case or notifying the property owner may prompt the landlord to serve an eviction notice against you as well.

Can the police remove a roommate who is not on the lease?

In most situations, no. California law enforcement treats roommate disputes as civil matters and will refuse to remove an occupant who claims residency. The only narrow exception is a single lodger in an owner-occupied home under California Penal Code § 602.3, though many local police departments still require a court order before intervening.

What happens if I lock out my roommate while they are at work?

Executing a self-help lockout violates California Civil Code § 789.3. The roommate can sue you for actual damages, emotional distress, court costs, attorney fees, and statutory penalties of up to $100 per day that they are excluded from the residence.

General information only, last updated 2026-10-18. Caunsel is not a law firm and does not practise law. AI answers and this guide are not legal advice. Verify filings, deadlines, and statutes with a licensed lawyer in California, United States.