Question: how much notice is required before a rent increase?
Answer: Rent Increases: RCW 59.18. 140 requires landlords to give tenants 60 Days' notice before increasing the rent. In a month-to-month rental, the landlord must give you 60 Days' written notice before each rent increase (except in certain subsidized rental units, the landlord must give you at least 30 days written notice).