From 5/7/2025 through 12/31/2025, the lease boost cap is 10%.

From 1/1/26 through 12/31/26, the lease increase cap is 9.683%

It is a finest practice for housing suppliers to change rent frequently, keeping rents in the variety of the location market rate. Housing service providers that keep leas lower than the market rate in order to keep long-lasting occupants will quickly find themselves in a situation where they require to contribute money to the residential or commercial property for continuous upkeep, and to cover increasing operating expense such as taxes, insurance, and administration, like needing to serve notifications through Certified Mail!

It is essential to develop and document your rent boost policies to follow all state and city government policies on increasing lease. First, let's look at the new and existing laws that govern lease increases throughout the state, then go over the actions and best practices for providing lease increases.

RENT INCREASE REQUIREMENTS FOR ALL RESIDENTIAL TENANCIES:

RCW 59.18.140 + EHB 1217 (WA 2025)