"Unlawful detainer" is the legal term for the court case a landlord generally must file in California to recover possession of a rental property from a tenant. It is easy to hear the phrase used loosely, but an unlawful detainer action is a specific type of civil lawsuit with its own rules, timelines, and terminology — distinct from a typical breach-of-contract case.
What Makes an Unlawful Detainer Different
Unlike most civil lawsuits, unlawful detainer cases are generally handled on an expedited basis by California courts because they involve the right to possess real property. Statutes set out shortened timelines for serving documents, filing a response, and setting a trial date compared to standard civil litigation. This is one reason both landlords and tenants benefit from understanding the process before a notice period expires. See our overview of the California eviction process for how an unlawful detainer fits into the broader timeline.
Who Can File, and When
A landlord (or, in some cases, a new owner following a foreclosure or sale) may generally file an unlawful detainer action after a required notice period has expired without the tenant curing the issue or vacating, where a notice was legally required. The specific type of notice that must precede the filing — and how much time it must give — depends on the reason for the action; see our articles on 3-day notices and 30-day and 60-day notices.
The General Shape of the Case
After filing, the tenant is formally served with a summons and complaint. California law generally gives tenants a short window to file a response, and the case then proceeds toward a hearing or trial if it is not resolved earlier through settlement or another agreement. Throughout the case, either side may raise arguments or defenses relevant to the specific facts — see our overview of common eviction defenses.
What an Unlawful Detainer Judgment Does — and Does Not — Do
A judgment in an unlawful detainer action addresses possession of the property, and generally can include an award of unpaid rent and certain costs. It is a distinct legal process from, for example, a separate breach-of-contract action for other damages, and it does not itself carry out a physical move-out — that generally requires a subsequent writ of possession enforced by the local sheriff's department, with notice to the tenant beforehand.
Why the Details Matter for Both Sides
Because unlawful detainer procedure is technical and time-sensitive, small missteps — an improperly worded notice, an incorrect method of service, a missed response deadline — can affect the outcome of a case regardless of which side of the dispute you are on. Landlords and tenants alike are generally well served by understanding where a case stands and what is required at each stage.
If you are a landlord considering an unlawful detainer filing, or a tenant who has been served with one, our office offers a free initial consultation to discuss the situation.