Kelso is a small city of roughly 12,000 residents in Cowlitz County in southwest Washington, situated along the Cowlitz River near its confluence with the Columbia. A significant share of Kelso households are renters, and like residents statewide, they rely primarily on Washington's Residential Landlord-Tenant Act (RLTA), codified at RCW 59.18, for legal protections against improper rent practices, unsafe housing, and wrongful eviction.
Kelso has not adopted any local rental ordinances — no rent control, no just-cause-only eviction requirement beyond state law, and no local security deposit rules. That means state law sets the floor and, in this city, also the ceiling for tenant protections. Renters in Kelso should understand what RCW 59.18 guarantees them, particularly around habitability, deposit returns, and eviction procedure, because those are the rules a Kelso landlord is legally required to follow.
This article summarizes the laws that apply to most residential tenants in Kelso, Washington. It is informational only and does not constitute legal advice. Laws can change; if you have a specific legal problem, consult an attorney or contact a legal aid organization.
This city has no local rent control, and under RCW 35.21.830 no Washington city or county may enact it. This statewide preemption — extended to counties by RCW 36.01.130 — has barred local rent control since 1981, so no city in Washington has the authority to adopt its own rent cap or rent stabilization ordinance.
Rent in Washington is no longer unlimited, however. Under HB 1217 (RCW 59.18.700, effective May 7, 2025), residential rent increases are capped statewide at the lesser of 7% plus CPI or 10% in any 12-month period; the Washington Department of Commerce set the maximum allowable increase at 9.683% for the 2026 calendar year. A landlord may not raise the rent during the first 12 months of a tenancy, and must give at least 90 days' written notice before any increase takes effect. Units first occupied for residential use within the previous 12 years are exempt from the cap (RCW 59.18.710).
Rent still cannot be raised during a fixed-term lease unless the lease expressly allows it, and a landlord may never increase rent in retaliation for a tenant exercising a legal right, such as requesting repairs or reporting a code violation (RCW 59.18.240).
Washington's Residential Landlord-Tenant Act (RCW 59.18) provides the following key protections to Kelso renters:
Habitability (RCW 59.18.060): Landlords must maintain rental units in reasonably weathertight condition; provide adequate heat, water, and hot water; keep common areas safe; maintain electrical, plumbing, and heating systems; and comply with applicable building and housing codes. This is a non-waivable duty — a lease clause purporting to waive habitability is void.
Repair and Deduct / Rent Withholding (RCW 59.18.070 & 59.18.110): If a landlord fails to make repairs after proper written notice, tenants may — depending on the nature of the defect — deposit rent into escrow, request a rent reduction, or in some cases arrange for repairs and deduct costs from rent (up to one month's rent). The process requires specific written notices and time periods; tenants should follow the statute carefully.
Security Deposits (RCW 59.18.260–59.18.285): A written rental agreement is required if a deposit is collected. The landlord must provide a written checklist of the unit's condition at move-in and must hold the deposit in a trust account. The deposit must be returned — or an itemized statement of deductions mailed — within 30 days of the tenancy ending.
Notice Requirements (RCW 59.18.200): Either party must give at least 20 days' written notice before the end of a rental period to terminate a month-to-month tenancy. Landlords must also provide 20 days' notice before a rent increase takes effect (RCW 59.18.140).
Just Cause Eviction (RCW 59.18.650): Washington's 2021 just-cause law requires landlords to have a statutorily specified reason to terminate a tenancy after the first year of occupancy (or after the first lease term, whichever is longer). Qualifying reasons include non-payment of rent, material lease violations, owner move-in, and others listed in the statute. This does not apply to the initial lease term.
Anti-Retaliation (RCW 59.18.240): A landlord may not increase rent, reduce services, or threaten eviction in retaliation against a tenant for reporting code violations, organizing with other tenants, or asserting rights under the RLTA. Retaliatory conduct within 90 days of protected activity is presumed retaliatory.
Lockout and Utility Shutoff Prohibition (RCW 59.18.290): A landlord may not lock out a tenant, remove doors or windows, or terminate utility service as a means of eviction. Only a court order can lawfully remove a tenant.
Washington law (RCW 59.18.260–59.18.285) governs security deposits for Kelso rentals. Key rules include:
No statutory cap: Washington does not limit how much a landlord may charge for a security deposit. However, any nonrefundable fees must be clearly labeled as nonrefundable in the written rental agreement — otherwise they are treated as part of the refundable deposit.
Written agreement and move-in checklist required (RCW 59.18.260): If a landlord collects a deposit, the tenancy must be documented in a written rental agreement, and the landlord must provide a written condition checklist of the unit before or at move-in, signed by both parties. Failure to provide the checklist may limit the landlord's ability to make deductions.
Trust account (RCW 59.18.270): The deposit must be deposited in a trust account with a Washington bank or escrow company. The landlord must provide the tenant with written notice of the financial institution's name and address.
Return deadline — 30 days (RCW 59.18.280): Within 30 days after the tenancy ends and the tenant vacates, the landlord must either return the full deposit or mail an itemized statement of deductions along with any remaining balance. The statement must identify each deduction and its dollar amount.
Penalty for wrongful withholding (RCW 59.18.280): If the landlord wrongfully withholds the deposit or fails to provide a timely itemized statement, the tenant may sue and recover up to two times the amount wrongfully withheld, plus court costs and reasonable attorneys' fees. Courts have interpreted willful non-compliance strictly in tenants' favor.
Evictions in Kelso follow the process established by Washington's Residential Landlord-Tenant Act (RCW 59.18) and the Unlawful Detainer statutes (RCW 59.12). The general steps are:
Step 1 — Written Notice: The landlord must serve a written notice before filing any court action. The type and length of notice depends on the reason for eviction:
Step 2 — Filing an Unlawful Detainer Action: If the tenant does not comply with or contest the notice, the landlord may file an Unlawful Detainer (eviction) lawsuit in Cowlitz County Superior Court or District Court. The tenant will be served with a summons and complaint and typically has between 7 and 30 days to respond, depending on the type of eviction.
Step 3 — Court Hearing: Both parties present their case before a judge. Tenants may raise defenses including improper notice, retaliation (RCW 59.18.240), or the landlord's failure to maintain habitability (RCW 59.18.060). Washington courts take procedural compliance seriously; defective notices can defeat an eviction action.
Step 4 — Writ of Restitution: If the landlord prevails, the court issues a Writ of Restitution authorizing the sheriff to remove the tenant. Only a sheriff acting under a court writ may physically remove a tenant.
Self-Help Eviction Is Illegal (RCW 59.18.290): A landlord who locks out a tenant, removes belongings, shuts off utilities, or otherwise attempts to force a tenant out without a court order is liable for actual damages, plus costs and attorneys' fees. Tenants subjected to self-help eviction may obtain immediate relief from a court.
Just Cause After First Year (RCW 59.18.650): After a tenancy has lasted more than one year (or more than the first lease term), a Kelso landlord must have one of the statutorily listed just-cause reasons to terminate. Renters in long-term tenancies have stronger protections against no-cause termination than renters in their first year.
No-cause termination is not a valid landlord path in Washington. Under the statewide just-cause law (RCW 59.18.650), a landlord may not end or decline to renew a periodic (month-to-month) tenancy without stating one of the statute's enumerated just-cause grounds. The 20-day notice under RCW 59.18.200 is the tenant's own notice to move out of a month-to-month tenancy — it is not a no-cause eviction tool for landlords. No-fault grounds such as the owner or a family member moving in, sale of the property to a buyer who will occupy it, or demolition or substantial rehabilitation each require at least 90 days' written notice under RCW 59.18.650(2).
This article is provided for general informational purposes only and does not constitute legal advice. The information reflects the author's understanding of Washington State and Kelso, WA laws as of April 2026, but laws and local ordinances can change at any time. Tenants with specific legal questions or problems should consult a licensed Washington attorney or contact a qualified legal aid organization such as the Northwest Justice Project or Columbia Legal Services. RentCheckMe is not a law firm and no attorney-client relationship is created by reading this content.
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