Wash. Rev. Code § 59.18 § 59.18.400
Forcible entry or detainer or unlawful detainer actions -- Writ of restitution -- Answer of defendant.
Operative Text
On or before the day fixed for his appearance the defendant may appear and answer. The defendant in his answer may assert any legal or equitable defense or set-off arising out of the tenancy. If the complaint alleges that the tenancy should be terminated because the defendant tenant, subtenant, sublessee, or resident engaged in drug-related activity, or allowed any other person to engage in drug-related activity at the rental premises with his or her knowledge or consent, no set-off shall be allowed as a defense to the complaint.
Washington law under Wash. Rev. Code § 59.18.400 establishes the procedural rights of a tenant who has been served with an unlawful detainer or forcible entry action. By the date set for their court appearance, the tenant may file an answer raising any legal or equitable defense or counterclaim (called a 'set-off') that arises from the tenancy. However, there is a notable exception: when the landlord's complaint is based on alleged drug-related activity by the tenant, subtenant, sublessee, or resident — or someone they knowingly permitted — the tenant is barred from using a set-off as a defense.
Plain English — not legal advice.
Under Wash. Rev. Code § 59.18.400, landlords initiating an unlawful detainer action should be aware that tenants are generally permitted to raise defenses and counterclaims rooted in the tenancy relationship. Compliant operators typically ensure that their complaints are factually specific and well-documented, particularly when alleging drug-related activity, since that ground carries the procedural benefit of foreclosing the tenant's set-off defense. Maintaining thorough records of lease terms, notices, and any incidents is a practice commonly associated with operators who navigate these proceedings effectively.
General guidance for property managers — not legal advice for your specific situation. Consult an attorney for advice on your case.
Wash. Rev. Code § 59.18.400 gives tenants the right to appear in court by the date specified and file a written answer asserting legal or equitable defenses or counterclaims arising from the tenancy — such as habitability issues or improper notices. If the landlord's complaint is grounded in alleged drug-related activity, this provision removes the ability to use a set-off as a defense, though other defenses may still be available. Tenants facing an unlawful detainer action may wish to consult a tenant-rights organization or legal aid provider to understand which defenses apply to their circumstances.
General guidance for tenants — not legal advice for your specific situation. Consult a tenant-rights organization or attorney for advice on your case.
Generated October 7, 2026 — auto-generated, not yet human-reviewed. See /transparency for methodology.
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