Can a Washington tenant dispute a rent increase?
Yes, on specific legal grounds: the notice was defective (wrong form, wrong advance period, wrong effective date), the increase exceeds the applicable cap (if Washington has one), the unit is rent-stabilized or rent-controlled under local ordinance, or the increase is retaliatory (in response to a tenant complaint, code-compliance request, or organizing). Washington HB 1217 (2024) requires 90 days advance notice for any rent increase, prohibits any increase during the first 12 months, and caps annual increases at the lower of CPI + 7% or 10% flat. Buildings under 12 years old are exempt. The rent cap framework sunsets July 1, 2040. A tenant-lawyer consultation is recommended for any disputed increase.
Source: RCW 59.18.140 (90-day advance notice for any rent increase, HB 1217)
This is an informational answer based on RCW 59.18.140 (90-day advance notice for any rent increase, HB 1217) as of early 2026. It is not legal advice. Housing law changes year to year and local ordinances (especially in rent-controlled or rent-stabilized cities) can override or add to state law. For contested cases, consult a Washington-licensed attorney.