Washington Landlord Tenant Laws: 2026 Guide

Washington landlord tenant laws changed more in the past eighteen months than in the prior two decades, and the biggest shift lands on every residential rental in the state regardless of portfolio size. In May 2025, Washington became the third state to pass statewide rent control, and a wave of new paperwork rules, notice requirements, and eviction procedures arrived alongside it. If you own one duplex or eight single-family rentals, you're covered by the same rules as a 500-unit apartment complex — and a surprising amount of the advice circulating online about those rules is wrong.

Washington Landlord Tenant Laws at a Glance

Washington's rental rules live mainly in the Residential Landlord-Tenant Act, RCW 59.18, which governs security deposits, entry notice, maintenance duties, and lease terms for houses, condos, and apartments. A separate law, the Manufactured/Mobile Home Landlord-Tenant Act (RCW 59.20), covers mobile home lot tenancies with its own, different rules — mixing the two up is where a lot of bad information online starts. Eviction procedure runs through RCW 59.12, the unlawful detainer statute.

All of this applies no matter how many units you own; Washington doesn't carve out an exemption for small landlords the way some states do for owner-occupied duplexes. On top of the state floor, Seattle, Tacoma, Spokane, Burien, and Federal Way all layer on local ordinances — Seattle in particular adds its own late fee cap, deposit cap, and fair chance housing rules on top of state law, so always check your city before you finalize a lease or notice.

Rent Increases: Washington's New Statewide Cap Explained

Washington had no rent control at all until Governor Bob Ferguson signed HB 1217 on May 7, 2025, effective immediately. The law caps most annual rent increases at 7% plus inflation or 10%, whichever is lower, and the Washington State Department of Commerce recalculates the actual dollar-and-cents ceiling each year from June inflation data. For calendar year 2026, Commerce set that maximum at 9.683% — so a $2,000 monthly rent can go up by roughly $194 over 12 months, not a penny more, unless your unit falls under one of the law's exemptions.

A few other pieces of HB 1217 matter just as much as the percentage cap:

You cannot raise rent at all during a tenant's first 12 months in the unit.
Rent increase notices must go out at least 90 days ahead of the effective date, up from the old 60-day standard, and must use the statutorily required notice form — an increase served on your own letterhead without the mandated language is ineffective.
"Rental parity" rules bar you from charging more than a 5% premium for a month-to-month tenancy versus a fixed-term lease on the same unit, closing a loophole landlords used to route around the cap.
New construction is exempt from the rent cap for 12 years from the certificate of occupancy, and manufactured home lot rent increases are capped separately at 5% with no sunset date.

Violating the cap isn't a minor paperwork slip. Tenants or the state attorney general can sue for actual damages, repayment of unlawfully collected rent, statutory penalties up to $7,500 per violation, and attorney fees. Before you send any increase notice, run the math against the current annual cap and confirm your unit isn't newly constructed or otherwise exempt — a tool like Vantric's rental calculator helps you check a proposed rent against fair-market comparables so the increase holds up if a tenant pushes back. If you're weighing how large an increase to actually propose within that ceiling, our guide on how to raise rent without losing good tenants covers the conversation, not just the legal minimum.

Security Deposits: No Statewide Cap, But Heavy Paperwork Requirements

Unlike the rent cap, Washington sets no statewide dollar limit on security deposits for ordinary house, condo, or apartment rentals — that's a local-ordinance issue, and Seattle caps deposits plus nonrefundable move-in fees at one month's rent within city limits. What Washington does regulate heavily is process, and it trips up more small landlords than any dollar cap would.

You cannot legally collect a deposit at all unless the rental agreement is in writing and includes a move-in condition checklist signed by both you and the tenant under RCW 59.18.260. That checklist becomes your only basis for later deductions — you cannot charge for the condition of fixtures, carpets, or appliances at move-out unless their move-in condition was documented on it first. The deposit itself has to sit in a trust account with a bank or licensed escrow agent, and the tenant must get a written receipt showing where it's held.

At move-out, you have 30 days after the tenant vacates to send a full, itemized statement backed by receipts, invoices, or repair estimates — a deadline HB 1074 extended from the old 21-day standard in 2023. Miss it, and you don't just lose the disputed portion: you forfeit the entire deposit and can't assert any claim against it, absent circumstances genuinely beyond your control. If a court finds the refusal was intentional, you can be on the hook for up to twice the deposit plus the tenant's attorney fees. Knowing what actually counts as chargeable damage versus normal use matters here too — our breakdown of normal wear and tear versus damage walks through what holds up when a deduction gets challenged.

Because that 30-day clock starts the moment the tenant vacates rather than whenever you get around to inspecting the unit, a system that flags the deadline automatically beats a reminder you set and then forget — which is exactly what tools like Vantric are built to catch. Washington also lets you offer an optional, nonrefundable monthly fee in lieu of a traditional deposit under RCW 59.18.670, provided you offer it evenhandedly to every approved applicant.

Late Fees: Why the "1.5% Cap" You've Read About Is Wrong

Here's where a lot of 2025 and 2026 landlord content gets Washington law flatly wrong. A number of guides now claim the state caps residential late fees at 1.5% of rent, or at a flat $75 a month. Neither figure exists in the statute for a standard house, condo, or apartment rental.

What actually happened: HB 1217 did add an escalating late fee cap — 2% of monthly rent in the first month past due, 3% in the second consecutive month, and 5% after that — but that language sits in RCW 59.20.060, the manufactured and mobile home landlord-tenant act. It applies to mobile home lot tenancies only. Standard residential rentals under RCW 59.18 got no percentage or dollar cap at all from that bill.

What does apply to every rental statewide is the grace period in RCW 59.18.170: you cannot charge a late fee for rent paid within five days of the due date, and once rent is more than five days late, fees run from the first day after the due date, not from day six. A 2025 amendment to RCW 59.18.230 went further and made any lease clause that tries to charge a fee inside that five-day window unenforceable, for leases signed or renewed on or after July 27, 2025. Courts will also refuse to enforce a fee that functions as a penalty rather than a reasonable estimate of your actual damages, so an eye-popping flat fee is risky even without a statutory cap. And under RCW 59.18.283, any payment a tenant makes has to be applied to rent before late fees — you can't let a fee sit unpaid and then evict over it.

Seattle is the exception worth flagging: Seattle's rental agreement regulation ordinance caps total late fees at $10 a month inside city limits, so a Seattle rental is functionally capped even though the state isn't. Our full breakdown of what you can legally charge as a late fee covers how to structure a compliant fee once you know the real ceiling — and Vantric's full Washington late fee data has the citations if you want to check a specific lease clause.

Just Cause Eviction: You Can No Longer Decline to Renew Without a Reason

This is the rule that catches the most small landlords off guard. Washington has abolished no-cause termination of residential tenancies entirely. Under RCW 59.18.650, you can only end or decline to continue a tenancy for one of a specific list of causes, each carrying its own notice period:

90 days for the owner or an immediate family member to move in
90 days if you're selling a single-family home
120 days for demolition or substantial rehabilitation
30 days if the unit is condemned or legally uninhabitable
60 days for other good cause tied to a legitimate economic or business reason, or four documented lease violations within 12 months

If you're used to simply not renewing a month-to-month lease because you'd rather rent to someone else, that option no longer exists in Washington. A termination notice that doesn't fit one of the enumerated grounds is unenforceable, and several cities — Seattle, Tacoma, Burien, and Federal Way among them — add further just-cause restrictions on top of the state list. Given how form-dependent and cause-dependent Washington evictions have become, this is a state where consulting an attorney before you serve a termination notice is worth the cost rather than a risk worth taking on your own.

The Eviction Process and Notice Rules

For nonpayment, RCW 59.12.030(3) gives the tenant 14 days after service to pay or vacate, and the notice must substantially match the form the state Attorney General publishes under RCW 59.18.057 — using your own wording is a common reason cases get dismissed at the show-cause hearing. The notice can only demand "rent" as narrowly defined by statute; late fees, damages, and attorney costs can't be folded into the total, and doing so is another frequent dismissal trigger. Lease violations that aren't nonpayment get a 10-day cure notice, while waste, nuisance, or serious misconduct can support a 3-day notice with no right to fix the problem.

One detail worth flagging because a lot of current guides still get it backward: HB 1003 required certified mail for these notices starting in 2025, but HB 2664, effective June 11, 2026, repealed that requirement. Regular first-class mail deposited from within Washington is sufficient again — you just still have to add five extra days before filing when you serve by mail, on top of the notice period itself.

If the tenant doesn't comply, the eviction — legally an "unlawful detainer" action — is filed in Superior Court. The statutory filing fee is only $45, but county surcharges push a typical uncontested case to roughly $135, and $250 or more once an answer is filed or a show-cause hearing is requested. Washington's right-to-counsel program for qualifying tenants and local eviction-resolution requirements in some counties routinely stretch the full process to six to twelve weeks.

Self-help eviction is flatly illegal: changing locks or removing a tenant's belongings without a sheriff executing a court-issued writ of restitution exposes you to the tenant's actual damages, costs, and attorney fees, and cutting off utilities can add statutory damages of up to $100 per day. Vantric's full Washington eviction data has the complete notice-form and filing-fee breakdown by county if you're building out a compliant process before you need it.

Entry Notice and Other Day-to-Day Compliance Rules

Outside of deposits and evictions, RCW 59.18.150 sets Washington's entry rules: at least two days' written notice before entering for repairs, maintenance, or an inspection, and at least one day's notice before showing the unit to a prospective tenant or buyer, except in a genuine emergency. The written notice has to state a specific date and either an exact time or a defined window, plus a phone number the tenant can use to object or ask to reschedule.

A few more rules worth building into your process from day one: you can't collect a security deposit or holding deposit without the written checklist described earlier, a holding deposit to reserve a unit is capped at 25% of first month's rent, and Washington law requires an individualized assessment of an applicant's criminal history rather than a blanket denial policy — a flat "no felony convictions" screening rule can expose you to a fair-housing complaint. If you manage more than a unit or two, tracking notice periods, deposit deadlines, and rent-cap math by hand gets error-prone fast, which is exactly the kind of compliance overhead Vantric's free tools are designed to take off your plate — from the prorated rent calculator for mid-lease adjustments to a running record of every notice you've served. Start a free trial at app.getvantric.com/sign-up to see how much of this Washington's 2026 rulebook you can put on autopilot.