Short summaries of the rules that shape Washington leases, notices, and deposit papers on LeaseGen.io. Last reviewed 2026-08-15. Not legal advice.
Security deposits
Cap
No statutory cap
Return clock
30 days after the tenancy ends
Washington does not cap how large a residential security deposit may be. A written rental agreement must explain the deposit. Give a move-in checklist. Unused deposit plus an itemized list is generally due within 30 days (Wash. Rev. Code § 59.18.280).
A tenant may end a month-to-month tenancy with at least 20 days’ notice before the end of the period. After 12 months, a landlord generally needs a qualifying just-cause reason (Wash. Rev. Code §§ 59.18.200, 59.18.650).
Except in an emergency, the landlord must give at least two days’ notice before entering (Wash. Rev. Code § 59.18.150).
Washington generally requires at least 60 days’ written notice before a rent increase takes effect (Wash. Rev. Code § 59.18.140). Seattle and other cities may require more.
Washington’s 14-day pay-or-vacate notice is the usual rent step. Just-cause rules apply to many terminations after 12 months. Seattle adds local notices.
These Washington cities often have rent-control, just-cause, or relocation rules on top of state law. Confirm the ordinance before you raise rent or decline to renew.