Statewide cap: 7%+CPI, max 10%
This guide covers Washington’s rent control rules. It’s for landlords operating 1 to 20 units. We focus on practical application. Your bottom line is compliance. Avoid common pitfalls. Washington’s approach to rent control is distinct. It does not implement traditional rent control, like caps on annual increases. Instead, the state uses a robust "just cause" eviction framework. This framework acts as an indirect form of rent control. It limits your ability to remove tenants without specific, legally defined reasons.
The controlling statute is the Residential Landlord-Tenant Act (RCW § 59.18). This statute outlines your obligations and tenant rights. It dictates notice periods. It defines what constitutes a legal eviction. Understanding RCW § 59.18 is critical. Ignorance is not a defense. Mistakes can be costly.
Who regulates these rules? Primarily, local courts. They interpret and enforce RCW § 59.18. The Attorney General's Office also provides guidance and can investigate certain landlord-tenant disputes. However, direct enforcement of rent control (as it exists in Washington) falls to the courts during eviction proceedings. Your compliance is scrutinized there.
Washington state does not have statewide rent control in the traditional sense. You will not find a state law capping rent increases at a specific percentage annually. This is a key distinction from states like Oregon or California. Instead, Washington employs a statewide "just cause" eviction requirement. This means you cannot terminate a tenancy without a specific, legally recognized reason. This applies to month-to-month tenancies and the end of fixed-term leases.
The "just cause" requirement significantly impacts your ability to manage your units. You cannot simply decide not to renew a lease because you want to raise the rent substantially for a new tenant. If you want to increase rent significantly, your existing tenant can stay unless you have a just cause to evict them. This effectively discourages extreme rent hikes. It keeps existing tenants in place. This is Washington’s indirect approach to stability and affordability.
Your primary concern is understanding and adhering to the "just cause" eviction rules. Do not issue a "no-cause" eviction notice. It’s illegal statewide. You need a specific reason. These reasons are enumerated in RCW § 59.18. For example, non-payment of rent is a just cause. But you must follow strict notice procedures.
A common landlord mistake: attempting to evict a tenant for minor lease violations without proper documentation or without providing an opportunity to cure the violation. Or, worse, trying to evict without any stated cause. This leads to costly legal battles you will lose. Don't do that. Do ensure every eviction notice cites a specific, valid just cause from RCW § 59.18. Do meticulously document all communication and lease violations. Do follow notice periods precisely.
Regarding security deposits: Washington caps security deposits at 1.00 months of rent. You cannot charge more. You must also provide a written checklist of the condition of the premises at the commencement of tenancy. Failure to do so impacts your ability to claim deductions from the deposit later.
As of recent legislative sessions, Washington has seen continued efforts to strengthen tenant protections. While traditional rent control has not passed, there's been discussion around capping annual rent increases at a specific percentage, often tied to inflation or a fixed rate like 7%. These proposals have not become law statewide. However, individual cities sometimes explore their own measures. Landlords should monitor legislative developments closely. What doesn't pass one session may reappear in the next. The trend is toward increased tenant protections. This includes proposals to extend the notice period for rent increases beyond the current 60 days, and further restricting the allowable "just causes" for eviction. For example, legislation in 2024 aimed to prevent rent increases for substandard housing conditions. Stay informed. These changes directly affect your operations and potential eviction risks.
The landscape is always evolving. Compliance is not static. Your responsibility is ongoing. Keep current with RCW § 59.18. Consult legal counsel for specific situations. This guide provides a framework. It is not legal advice. But it should clarify Washington’s unique position. It should highlight your key operational considerations.
| Annual rent increase cap | 7%+CPI, max 10% | |
| Just cause required for eviction | Yes | |
| Local rent control allowed? | Yes (subject to any state-law limits) |
The Washington statutory rent-increase formula is 7%+CPI, max 10%, codified at RCW § 59.18 (Residential Landlord-Tenant Act). The cap limits the percentage by which a Washington landlord may raise rent on a covered residential unit over any 12-month period, and applies both to renewal of a fixed-term Washington lease and to rent increases within an ongoing month-to-month tenancy.
Typical Washington rent-cap exemptions include: new construction (units first certified for occupancy within the statutory exemption window, commonly 15 years from the certificate of occupancy date); owner-occupied 2-to-4 unit buildings (so-called small owner-occupant exemption); single-family rentals under certain conditions (often exempt if the owner is a natural person and not a corporation, LLC, or REIT); units already subject to a regulated-affordability agreement (LIHTC, HUD Section 8 HAP, public housing, HOME, CDBG, inclusionary zoning); dormitories and institutional housing operated by universities, hospitals, religious institutions, or non-profit organizations; and hotels, motels, and transient lodging occupied for fewer than 30 days. Every Washington landlord should verify the specific exemption language in the cited statute, exemptions are narrowly construed, and mis-claiming an exemption exposes the landlord to refund-of-overpayment, statutory damages, and attorney fees.
Washington statutory rent-increase notice must be in writing and must state, at minimum, the current rent, the proposed new rent, the effective date of the increase, the percentage increase, the statutory formula used, and any allowable passthroughs (utility, property tax, capital improvement) separately itemized. Defective rent-increase notice is the #1 reason Washington courts roll back rent increases, not cap violations themselves. A defective notice is treated as void, the prior rent remains in effect, and the landlord must re-serve a compliant notice before any increase takes effect. Typical advance-notice windows: 30 days for increases at or below a low statutory threshold, 60–90 days for larger increases.
Within Washington, 2 additional city or county rent-stabilization ordinance(s) layer further requirements on top of the statewide Washington rent cap, stricter percentage caps, expanded just-cause termination requirements, mandatory relocation assistance for covered tenancies, tenant-relocation fees triggered by certain rent increases, and city-level rent-registry or landlord-registration programs. See the rent-control city table above for the Washington cities with local rent-stabilization ordinances on record; where both the statewide cap and a local ordinance apply, the stricter rule controls.
| City | Ordinance | Annual Cap | Just Cause | SFR |
|---|---|---|---|---|
| Seattle | Statewide RCW 59.18.285 applies | 7%+CPI, max 10% | Yes | Yes |
| Tacoma | Statewide RCW 59.18.285 applies | 7%+CPI, max 10% | Yes | Yes |
Yes, since May 7, 2025 under HB 2114 (Limit Rent Increases and Stabilize Tenancy Act). The cap is 7 percent plus CPI, with an absolute ceiling of 10 percent. 2026 cap: 9.5 percent. Washington became the third state in the country (after Oregon and California) to enact statewide rent control. The framework applies to most residential rentals with exemptions for buildings less than 12 years old, owner-occupied buildings of 4 or fewer units, and certain subsidized housing.
9.5 percent. The formula is 7 percent plus the September CPI for the West Region, with an absolute ceiling of 10 percent. The cap is published by the Washington Department of Commerce or designated agency each fall, effective for rent increases in the following calendar year. Coverage applies to most Washington residential rentals subject to the new-construction and small-landlord exemptions.
Buildings less than 12 years old are exempt from the rent cap (rolling exemption; a building built in 2014 became covered in 2026). Owner-occupied buildings with 4 or fewer units are exempt. Single-family rentals held by non-corporate landlords are exempt (similar to California's AB 1482 exemption). Federally subsidized housing is exempt under specific subsidy categories. Just-cause provisions of HB 2114 apply more broadly than the rent cap itself, including to some otherwise rent-cap-exempt categories.
After the initial fixed-term lease expires, most no-cause terminations are prohibited. Statutory grounds: nonpayment, lease violation with cure right, landlord-occupancy, demolition or major renovation, conversion to non-residential use, criminal conduct. Landlord-occupancy and renovation grounds require relocation assistance equal to three months rent (higher than Oregon's one month or California's one month). The just-cause framework substantially limits Washington landlords' ability to end a tenancy without statutory cause after the first fixed term.
Tenant private right of action with statutory damages of 3 months rent plus actual damages plus reasonable attorney fees (mirroring Oregon SB 608 / ORS 90.385). On a $2,000-per-month Seattle unit, an unlawful 11 percent increase produces statutory damages of $6,000 plus the unlawful overcharge plus attorney fees on a single case. Washington plaintiff-side tenant attorneys actively pursue overcharge claims under HB 2114; the procedural framework parallels the well-developed Oregon enforcement landscape.
Informational only, not legal advice. Consult a licensed Washington attorney. Source attribution in the Sources band below.
