Squatters’ Rights in Washington State: Adverse Possession & Removal

“Squatter” is not a category defined in Washington statute, so what an owner can do depends on how the law classifies the occupant. This article covers how Washington distinguishes a squatter from a trespasser and a tenant, how the adverse possession doctrine can turn long-term possession into ownership, and how an owner removes a recent unauthorized occupant. It fits within Washington landlord-tenant law, which sets the broader rules for rental housing in the state.

Squatters, trespassers, and tenants: what the labels mean in Washington

A squatter is someone who occupies property without the owner’s permission and without any legal right to be there. Washington law does not treat “squatter” as a formal status. Instead, the occupant is analyzed as either a criminal trespasser, a person who might eventually claim ownership by adverse possession, or a tenant who has acquired rights under the Residential Landlord-Tenant Act.

The distinction that matters most is squatter versus tenant. A person who signed a rental agreement, or who was allowed to move in and pay rent, is a tenant even without a written lease. Once a tenancy exists, the occupant cannot be removed as a trespasser, and the owner must use the court eviction process. Washington residential lease requirements explain what turns an occupancy into a tenancy, and accepting rent or a Washington security deposit from an occupant is one of the clearest ways a tenancy is created.

The Washington Attorney General notes that anyone renting a home is covered by the Residential Landlord-Tenant Act, chapter 59.18 RCW. That coverage separates a tenant, who is entitled to notice and a court order before removal, from a trespasser, who is not.

Adverse possession: the 10-year path to ownership

Adverse possession is the doctrine that lets a long-term occupant become the legal owner of property. It exists because RCW 4.16.020 sets a 10-year limit on an owner’s ability to sue to recover real property. If the true owner does nothing for 10 years while someone else openly possesses the land, the occupant can ask a court to quiet title in their name.

Washington courts require the possession to be actual, open and notorious, exclusive, hostile (meaning without the owner’s permission), and continuous for the full 10-year period. Secret or occasional use does not count; the possession has to be visible enough that a reasonable owner would notice it.

A shorter path exists under RCW 7.28.070. A person who possesses land for 7 successive years under “claim and color of title” made in good faith, meaning a defective deed or document that appears to give ownership, and who pays all property taxes during those years, is treated as the legal owner. Without color of title and tax payment, the default 10-year period applies.

Removing an unauthorized occupant with a trespass declaration

For a recent occupant who is not a tenant, Washington created a removal process in RCW 9A.52.105. An owner or the owner’s authorized agent signs a declaration under penalty of perjury, and a peace officer with probable cause to believe the person is committing criminal trespass can remove the occupant and order them to stay off the property.

The declaration is defined in RCW 9A.52.115, the “Request to Remove Trespasser(s)” form. Among the facts the owner must swear to are that the occupants are not tenants and have not been tenants, or homeowners on title, within the last 12 months, that they entered and remain without authorization, that the owner has demanded they leave, and that the property was not abandoned when they entered.

1. Confirm the occupant is not a tenant

   The declaration requires the owner to swear that the occupants are not tenants and have not been tenants, or homeowners on title, within the last 12 months. If a tenancy exists, this process is unavailable and the eviction process applies instead.

2. Demand that the occupants leave

   Under RCW 9A.52.115, the owner must already have demanded that the unauthorized occupants vacate before signing the declaration.

3. Sign the declaration under penalty of perjury

   The owner or an authorized agent completes the Request to Remove Trespasser(s) declaration, initialing each required statement and signing under penalty of perjury. False statements carry criminal penalties for false swearing.

4. Provide the declaration to law enforcement

   A peace officer who receives the declaration and has probable cause of criminal trespass may remove the occupants. Under RCW 9A.52.105, the officer must give the occupants a reasonable opportunity to present credible evidence that they are authorized to be there.

Because the officer weighs any evidence the occupant offers, the process works cleanly only when the occupant plainly has no claim, meaning no lease, no rent receipts, and no documentation. When an occupant produces something that looks like a rental agreement, officers commonly decline to remove and refer the dispute to court.

When removal requires an eviction case instead

If the occupant is a tenant, the trespass declaration does not apply and the owner files an unlawful detainer (eviction) action. RCW 59.12.030 defines unlawful detainer to include a tenant who holds over after the tenancy ends or after proper notice. The case goes through the courts, and only a court can order the sheriff to remove the tenant.

Self-help removal of a tenant is illegal. RCW 59.18.290 makes it unlawful for a landlord to remove or exclude a tenant except under a court order, and a tenant removed in violation of that section can recover possession or terminate the tenancy, plus actual damages and attorney fees.

The Washington Courts self-help pages point renters and owners to the Residential Landlord-Tenant Act and to legal-aid organizations for eviction questions (Washington Courts self-help resources). An occupant with a genuine dispute over the implied warranty of habitability in Washington is being treated as a tenant, which again points the matter toward the eviction process rather than a trespass removal.

Self-help limits and criminal trespass

A squatter who has no colorable claim to the property is committing criminal trespass, and the trespass declaration process is designed to let law enforcement act on that. Owners cannot use force or intimidation to evict someone who has crossed into tenant status, and they cannot ignore an occupant’s apparent documentation.

For an occupant, staying after a demand to leave, without a lease, rent history, or ownership document, provides no “rights” and risks arrest for criminal trespass. Adverse possession is the only route by which unauthorized occupancy becomes a legal claim, and it takes years of open, tax-paying, exclusive possession plus a court judgment.