To kick out a squatter in California, call police right away if the person just broke in and has no claim of residency; if they’ve been there long enough that officers treat it as a civil matter, you’ll need to serve a written three-day notice to quit, file an unlawful detainer lawsuit in Superior Court, and have the county sheriff carry out the physical removal. Start-to-finish, the court route usually runs two to four months.
Call the Police First If the Trespass Is Fresh
If you discover someone in your property and it’s clear they just broke in, call the police. Officers can arrest the person for trespassing under California Penal Code 602, which makes unauthorized entry a misdemeanor punishable by up to six months in county jail and up to a $1,000 fine for repeat offenses.1California Legislative Information. California Penal Code 602 No court process required.
This works best when there’s clear evidence of forced entry, the person has few belongings inside, or you can show you’ve been actively monitoring the property. It falls apart when the person tells officers they live there, produces mail addressed to the property, or shows a fabricated lease. Police generally won’t referee competing occupancy claims on the spot. Once they call it a civil dispute, you’re on the unlawful detainer track.
Your own past actions can also lock you out of the quick option. If you ever accepted money from the person or gave verbal permission to stay, you may have created a tenancy, which brings stronger protections and a longer removal timeline.
Do Not Try to Force Them Out Yourself
California law prohibits owners from taking matters into their own hands, no matter how the person got in. Off the table:
- Changing the locks or otherwise blocking access
- Shutting off water, electricity, gas, or heat
- Removing the person’s belongings without their written consent
- Using threats or force to pressure them into leaving
Under California Civil Code 789.3, an owner who cuts utilities or locks someone out is liable for at least $250 per incident, plus $100 for each day the violation continues, plus the occupant’s actual damages and attorney’s fees.2California Office of the Attorney General. Protecting Tenants Against Unlawful Lockouts A two-week lockout can easily run several thousand dollars before fees. It also hands the squatter grounds to sue you, which delays the legitimate removal and puts you on the defensive in court.
Serve a Three-Day Notice to Quit
Before you can file suit, California requires a formal written notice demanding the person leave. For a squatter with no lease or rental agreement, that’s typically a three-day notice to quit.3California Courts. Types of Eviction Notices Include the occupant’s name (or “all occupants” if you don’t know it), the full property address, and a clear demand to vacate within three days.
Delivery matters as much as content. California recognizes three methods:
- Hand delivery to the occupant. The three-day clock starts the next day.
- Substituted service: give the notice to another adult at the property, then mail a copy. The clock starts the day after mailing.
- Post and mail: tape the notice to the front door and mail a copy. The clock starts the day after mailing.
Keep proof of service for whichever method you use. A judge will want to see it.4California Courts. Deliver the Notice A common mistake: posting on the door without also mailing a copy. That makes the notice legally defective and forces you to start over.
File an Unlawful Detainer Lawsuit
If the squatter doesn’t leave when the notice period expires, file an unlawful detainer lawsuit in the county’s Superior Court. This is California’s fast-track eviction process and moves faster than a standard civil case.5California Courts. Eviction Cases in California
You’ll file a Summons and Complaint for Unlawful Detainer with the court clerk. As of January 2026, filing fees range from $240 to $435 depending on the amount of damages you’re claiming alongside possession.6Judicial Council of California. Statewide Civil Fee Schedule Effective January 1, 2026 After filing, a registered process server or the sheriff’s department must formally serve the court papers on the squatter. You cannot serve them yourself.5California Courts. Eviction Cases in California
Once served, the occupant has five days to file a written response.7Superior Court of California, County of Orange. Landlord / Tenant: General Information If they don’t respond, ask the court for a default judgment, which usually ends the case quickly. If they do respond, the court schedules a trial where both sides present evidence. Even contested unlawful detainer cases get priority scheduling, so you won’t wait months for a trial date the way you would in a regular lawsuit.
Let the Sheriff Do the Physical Removal
After you win, the court issues a Judgment of Possession and a Writ of Execution. The writ is what authorizes law enforcement to physically remove the occupant.8Judicial Council of California. EJ-130 Writ of Execution Take the writ to the county sheriff’s department, not your local police station. Only the sheriff has authority to carry out the removal.
A deputy posts a five-day notice on the property warning the occupant to leave. If the person is still there after five days, the sheriff returns to physically remove them and restore the property to you.8Judicial Council of California. EJ-130 Writ of Execution The squatter’s belongings may be placed outside at that point, and you can finally change the locks.
How Long the Whole Process Takes
From the day you serve the initial three-day notice through the sheriff lockout, budget two to four months. A straightforward case with no defense filed can wrap up in six to ten weeks. Contested cases with continuances or claimed rights to occupy push toward the longer end or beyond.
The biggest variable is county workload. Los Angeles and San Francisco carry heavier unlawful detainer dockets, which can slow scheduling. The sheriff’s department that executes the final removal has its own backlog. None of those delays are within the owner’s control, which is why catching the problem early and moving quickly on the paperwork matters.
Can a Squatter Claim Ownership of Your Property?
In rare cases, yes. California recognizes adverse possession, but the requirements are strict. A person must occupy the property continuously for at least five years and pay all property taxes during that entire period, proven through certified records from the county tax collector.9California Legislative Information. California Code of Civil Procedure 325 The occupation must also be open, hostile to the owner’s rights, exclusive, and continuous.
The tax payment requirement kills most claims. A squatter who lives in a vacant house for five years but never pays property taxes cannot claim ownership. Still, the smarter play is never letting things drift that far.
Preventing Squatters on Vacant Property
Removing a squatter is expensive and slow. Preventing one from moving in is cheap. If you own property that sits empty:
- Inspect at least monthly, or hire a property manager to do it. Squatters target homes that look abandoned.
- Secure entry points. Check windows, doors, and utility openings for tampering, and replace anything broken.
- Install security cameras. A basic doorbell camera that alerts you to approaches can catch entry before it becomes an established occupation.
- Keep exterior maintenance up. Overgrown lawns, piled mail, and dark windows signal that nobody is watching. Use timers on lights and arrange for mail pickup and lawn care.
- Know your neighbors. A neighbor with your phone number is your best early warning.
An owner who finds a squatter after a week has a trespassing problem. An owner who finds one after six months has a court case. Everything that shortens the discovery window works in your favor.