For renters
Check a notice you received
Free, no signup, and your answers are not saved.
Check my notice free →Current rent increase rules
Seattle rent increase calculator 2026
Use the current rules for the rental’s location, then choose the tool that matches what you need to do.
For landlords
Plan and create the notice
Check the amount and date free, then create the complete packet for $49.
Plan my increase →Seattle 2026 rules
For 2026, the Washington standard rent limit checked by RentCap is 9.683%. Seattle timing is the major local issue: housing-cost increases generally need 180 days of notice, so the delivery date can matter as much as the percentage.
- Standard rent limit
- 9.683%
- Manufactured or mobile-home row
- 5%
- Timing issue to watch
- Seattle housing-cost increases generally require 180 days of written notice.
- City rules
- Seattle adds a 180-day housing-cost notice requirement, EDRA information duties for increases of 10% or more, and an RRIO compliance gate.
- Source check
- Verified 2026-07-03
Landlord next step
Check before you deliver
Check the increase before delivering the notice. The packet applies Seattle timing, identifies EDRA issues, and verifies the RRIO answer separately from the statewide percentage.
Renter next step
Use the notice exactly as written
Use the notice amount and dates exactly as written. The result separates the statewide limit from Seattle timing, EDRA, and RRIO issues so one clean answer does not hide another problem.
What to enter
Use the current rent, proposed rent, actual or planned delivery date, delivery method, kind of home, rental agreement, and any property-exemption facts you know. It is fine to mark difficult facts as unknown.
Related Washington pages
Washington hub Spokane Tacoma Vancouver Bellevue Everett Kent Renton Federal Way Kirkland Bellingham Olympia Yakima Kennewick Spokane Valley
Seattle amount check
The amount check starts with the current monthly rent and the proposed new rent. RentCap calculates the percentage increase, compares it with the published Washington limit, and keeps exemption questions separate so a missing fact does not look like a clean pass.
Seattle timing check
Washington notice timing and service rules decide the earliest supported effective date. The checker also aligns monthly increases to the rent-period start day entered in the form, because a day-count minimum can land mid-cycle.
City rules
Seattle adds a 180-day housing-cost notice requirement, EDRA information duties for increases of 10% or more, and an RRIO compliance gate. ZIP code is used as a backup for the cities RentCap covers, which helps avoid a wrong answer when the city name is misspelled or abbreviated.
Related guides
Washington's 2026 rent cap: the exact math and five ways notices still fail HB 2664 changed Washington rent-notice delivery: what the 2026 rule says Washington's 12-year rent-cap exemption: which buildings qualify Seattle landlords: RRIO compliance can gate a rent increase How much can my landlord raise my rent in Washington in 2026? All guides
See the documents before you pay
Primary source: Washington cap publication · Seattle housing-cost increase guidance.