Current rent increase rules

Washington rent increase calculator

Choose the option that matches your situation. We do not save renter-check answers. Landlords can use the same rules to plan a notice.

Washington 2026 rent-increase rules

Washington checks need the statewide cap, the 90-day or local notice window, the Commerce notice form, and RCW 59.12.040 service details.

Standard cap
9.683%
Manufactured housing
5%
Verified
2026-07-03
Packet output
Notice, worksheet, service log, PDF
Best next step
Run the live checker below

For landlords

Check an increase before delivering the notice. If the requested amount or date needs adjustment, the app builds the version supported by the rules.

For renters

Check a notice you have already received. We do not save your answers, and every finding links to an official source.

Source updates

Review the changelog and Washington law timeline for verification dates and source changes.

What Washington landlords should verify first

Start with the rent amount, property type, tenancy start date, and planned delivery date. Those facts decide whether the statewide limit, first-year rule, Seattle rules, or manufactured/mobile home limit changes the packet.

What Washington renters can compare

Compare the notice amount, effective date, delivery method, and Commerce-form language with findings linked to official sources. The renter flow also checks deposit returns, utility shutoffs, termination notices, voucher restrictions, and lease-fee issues without saving your answers.