WA HB2452

Establishes specific service methods for rent increase notices: personal delivery, first-class mail (with 5 additional days' notice required), or posting in a conspicuous place on the dwelling unit such as taping to the front door

Requires minimum 90 days' written notice for rent increases on residential tenancies, with exceptions for subsidized housing (30 days) and certain transitional leases entered before May 7, 2025 (60 days)

Caps annual rent increases at 7% plus consumer price index or 10%, whichever is less, for residential units, and 5% for manufactured/mobile home lots, with exemptions for newer buildings and certain affordable housing properties

Mandates landlords use a standardized rent increase notice form that discloses the percentage increase, new dollar amount, and any exemptions claimed with supporting documentation

Authorizes tenants and the attorney general to sue for violations, with remedies including recovery of excess rent paid, up to 3 months of unlawful charges, attorney fees, and civil penalties up to $7,500 per violation