Washington state is one of the most tenant-protective jurisdictions in the United States. The Residential Landlord-Tenant Act (RLTA), codified at RCW 59.18, has governed virtually every aspect of the residential rental relationship since its commencement on July 16, 1973. Recent landmark legislation—House Bill 1217 (HB 1217)—has fundamentally reshaped the landscape by introducing new limits on fees and extending notice requirements for rent increases, effective May 7, 2025.

Combined with robust eviction protections, mandatory move-in checklists, and strict late fee limitations, Washington demands meticulous compliance from landlords operating in the state.

House Bill 1217: Improving Housing Stability

The most significant recent development in Washington landlord-tenant law is HB 1217, which introduced measures to limit fees and increase notice periods for rent adjustments.

• Notice: A 120-day written notice is required for any rent increase greater than 3%. For increases of 3% or less, a 60-day notice is required (RCW 59.18.140).
• Late Fees: Late fees are now capped statewide at $75 or 1.5% of the monthly rent, whichever is greater.
• Rent Caps: HB 1217 does not establish a rent cap; rent control remains prohibited under RCW 35.21.830.
• Penalties: The Attorney General can impose civil penalties for violations of these new standards.

See our Rent IncreasesPreview unavailable guide.

Security Deposits

Washington's deposit rules are strict regarding tenant protections but notably do not cap the amount.

• No Statewide Cap: There is no state-level limit on how much a landlord can charge, though local jurisdictions like Seattle cap deposits at one month's rent.
• Trust Account: Deposits must be held in a trust account at a bank or escrow company in Washington state.
• Move-In Checklist: Landlords are required by law to provide a detailed written checklist documenting the property's condition at the time of move-in.
• Return Deadline: Landlords must return the deposit (or an itemized deduction statement) within 30 days of the tenant vacating.
• Penalty: Failure to comply can result in the tenant recovering up to double the deposit plus attorney's fees.

See our Security DepositsPreview unavailable guide.

Eviction ("Unlawful Detainer")

Washington requires landlords to have a legally specified "just cause" reason to evict under RCW 59.18.650. The most common notices include:

Self-help evictions (changing locks, shutting off utilities) are strictly illegal and subject to severe penalties.

See our Eviction ProcessPreview unavailable guide.

Late Fees and Grace Periods

Washington imposes a mandatory statutory grace period and strict limitations on late fees:

• 5-Day Grace Period: Landlords cannot charge late fees for rent paid within five days of its due date (RCW 59.18.170).
• Statewide Cap: Under HB 1217, late fees are capped at $75 or 1.5% of the monthly rent, whichever is greater.
• Retroactive Application: If rent is more than five days late, the late fee can be applied retroactively from the first day after the due date.
• No Eviction for Late Fees Only: Landlords cannot evict a tenant solely for unpaid late fees.

See our Late FeesPreview unavailable guide.

How Landager Helps

Managing Washington properties requires precision, especially with Seattle's strict security deposit caps and the statewide 30-day return deadline. Landager automates the mandatory move-in checklist process, tracks the 14-day "pay or vacate" notices, and ensures rent increases are delivered with the required 120-day notice for increases over 3%. From managing installment payment requests to staying compliant with Just Cause eviction requirements, Landager helps you navigate the complex RCW 59.18 landscape.