Washington Rent Increase & Notice Rules: How Much Warning a Landlord Must Give

In Washington, a landlord generally must give a tenant at least 60 days' written notice before raising rent on a month-to-month (periodic) tenancy, and the increase cannot take effect until the next full rental period. That 60-day rule sits in Washington's Residential Landlord-Tenant Act (RCW 59.18). On top of that, Washington made a major change in 2025: a statewide rent-stabilization law (commonly known as the rent cap, HB 1217) now limits how much rent can be raised in a single year for many tenancies. This page explains the general rules, but because these laws are new and can change, you should confirm the current statute language or talk to a Washington tenant or landlord attorney before relying on any number.

How much notice to raise rent on a month-to-month tenancy

For a periodic (month-to-month) tenancy, Washington requires the landlord to deliver written notice of a rent increase well in advance. The longstanding rule is:

• At least 60 days before the end of the rental period for most month-to-month tenancies.
• A longer notice period applies to some subsidized and manufactured/mobile-home situations, so those tenants should check the specific rules that govern their housing.
• The increase only becomes effective at the start of a new rental period, not partway through one.

The notice should be in writing and clearly state the new amount and the date it takes effect. If your landlord tells you verbally that rent is going up next month, that almost certainly does not meet Washington's notice requirement. Because the 2025 rent law touched several procedures, confirm the exact current notice period for your situation rather than assuming the old timeline still applies in every case.

Does Washington have rent control or a rent cap?

For years, Washington banned local governments from passing rent control, and cities like Seattle could not impose their own caps. That preemption shaped the market for a long time. In 2025, however, the Legislature passed a statewide rent-stabilization law that changed the picture significantly. In broad terms:

• Annual rent increases for covered tenancies are limited to a percentage cap set by the statute (the law ties the cap to a percentage plus inflation, with an overall ceiling).
• Manufactured/mobile-home lot rents are subject to a separate, lower cap.
• The law includes exemptions, including newer construction (buildings below a certain age) and a tenant's first year in a unit.

Because this is a recent and detailed law, the exact cap percentage, the inflation measure used, and the list of exemptions matter a great deal, and they may be adjusted over time. Do not rely on a number you saw online without checking the current statute or asking a Washington attorney or legal aid program. Local ordinances may also add tenant protections on top of state law, so renters in larger cities should check their city's rules too.

Ending a month-to-month tenancy: landlord vs. tenant

Notice to end a tenancy is different from notice to raise rent, and the rules are not symmetrical in Washington.

• Tenant ending the tenancy: a tenant generally must give at least 20 days' written notice before the end of the rental period to move out of a month-to-month tenancy.
• Landlord ending the tenancy: Washington has a just-cause requirement (added in 2021, in RCW 59.18.650). A landlord usually cannot simply end a month-to-month tenancy without one of the specific reasons listed in the statute, such as certain owner moves, sale of the property, or particular tenant conduct. The amount of notice depends on which cause applies, and several causes require 60 or 90 days' notice.

This is one of the biggest differences from older Washington practice and from many other states: a landlord generally needs both a valid reason and the correct written notice to make a long-term tenant leave. If you receive a termination notice and you are not sure it states a lawful cause, that is a good moment to get legal help.

Fixed-term leases: no mid-lease rent hikes

If you signed a lease for a set term (for example, a one-year lease), the landlord generally cannot raise the rent in the middle of that term unless the lease itself specifically allows it. The agreed rent is locked in for the length of the lease. A landlord who wants more rent typically has to wait until the lease is up for renewal and then follow the notice and cap rules that apply at that point. Watch for lease clauses that try to build in automatic increases or pass-through charges, and ask questions before signing if the language is unclear.

Where these disputes are decided

In Washington, an eviction is handled through an unlawful detainer lawsuit, and those cases are generally heard in the Superior Court for the county where the property sits. Eviction in Washington is a court process; a landlord cannot legally lock you out, shut off utilities, or remove your belongings without going through the court. If you are served with eviction papers, deadlines are short, so respond quickly and consider contacting a Washington tenant attorney or a local legal aid organization right away.

This article is general legal information, not legal advice. Washington landlord-tenant law changes often, and cities and counties can add their own protections. Always confirm the current state rules and any local ordinances, and consult a Washington attorney or legal aid program for advice about your specific situation.