Concerning renters' and mobile home occupants' ability to install portable cooling devices.
This bill allows renters and mobile home occupants in Washington to install portable cooling devices (like window units or floor models) without landlord approval, with key exceptions for safety, building codes, or existing heat pumps. Landlords cannot charge fees for installation or restrict devices, but may require proper drainage and 48-hour notice for inspections. They must disclose insurance restrictions on window units in leases and inform tenants of their rights. The law does not override existing disability accommodation requirements or landlord responsibilities for electrical issues caused by tenant devices.
Bill status
signed
all 5 stages cleared
Introduction
Jan 2026
Committee Review
Mar 2026
Senate Passage
Mar 2026
House Passage
Mar 2026
Signed into Law
Mar 2026
Introduced Jan 16, 2026
Signed Mar 24, 2026
Maddy AI version diff · 3 comparisons
What changed between versions
Engrossed Substitute Bill
→
Substitute Passed Legislature
·
4 edits
MODERATE
The bill was finalized and certified for the 2026 session, adding official legislative signatures. Key policy changes include simplifying the rules for landlords who ban window AC units by removing the requirement to prove an insurance policy exists as a reason for a ban, and clarifying that landlords only need to warn tenants about bans if they actually have one. Additionally, the definition of a 'portable cooling device' was slightly narrowed to remove 'evaporative coolers' from the list of devices tenants can install.
Scope change
The bill's scope remains focused on residential rental housing, but the specific conditions under which landlords can restrict window AC units were modified to be less burdensome for landlords.
REQUIREMENT
Removed the requirement that a landlord must have an insurance policy restriction to legally ban a window AC unit; they can now ban it based on other criteria listed in the bill.
Changed the landlord's notification duty so they only need to inform tenants about AC restrictions if they actually choose to impose them.
DEFINITION
Updated the definition of 'portable cooling device' to exclude evaporative coolers, limiting the tenant right to install only air conditioners and portable heat pumps.
Narrowed the definition of 'portable cooling device' in a separate section by changing 'requires' to 'require' to ensure grammatical consistency with the rest of the act.
Floor votes · Senate Feb 17, 2026 · House Mar 3, 2026
How they voted
37–14
Passed
Total votes 51
Feb 17, 2026
D
Democratic31
100% Yea
R
Republican20
70% Nay
Vote distribution
All Yea
All Nay
Mixed
No data
Full legislative history
Actions timeline
Total actions
31
Key actions
16
Committee
10
Mar 24, 2026
Signed into law
Governor signed.
executive
Mar 11, 2026
Lower · Passed
Speaker signed.
lower
Mar 11, 2026
Upper · Passed
President signed.
upper
Mar 10, 2026
Upper · Passed
Passed final passage; yeas, 37; nays, 12; absent, 0; excused, 0.
upper
Mar 10, 2026
Upper · Passed
Senate concurred in House amendments.
upper
Mar 3, 2026
Lower · Passed
Committee amendment(s) adopted with no other amendments.
lower
Mar 3, 2026
House · Passed
House Vote: pass (66-29-5)
house
Feb 25, 2026
Committee
Referred to Rules 2 Review.
lower
Feb 24, 2026
Lower · Passed
Minority; without recommendation.
lower
Feb 24, 2026
Lower · Passed
HOUS - Majority; do pass with amendment(s).
lower
Feb 24, 2026
Lower · Passed
Executive action taken in the House Committee on Housing at 4:00 PM.
lower
Feb 23, 2026
Lower · Passed
Public hearing in the House Committee on Housing at 1:30 PM.
lower
Feb 17, 2026
Upper · Passed
Floor amendment(s) adopted.
upper
Feb 4, 2026
Upper · Passed
Minority; without recommendation.
upper
Feb 4, 2026
Upper · Passed
Executive action taken in the Senate Committee on Housing at 10:30 AM.
upper
Jan 30, 2026
Upper · Passed
Executive session scheduled, but no action was taken in the Senate Committee on Housing at 10:30 AM.
upper
Jan 23, 2026
Upper · Passed
Public hearing in the Senate Committee on Housing at 10:30 AM.
upper
1 primary · 10 co-sponsors
Sponsors
Role
Legislator
Party
State
District
P
Vandana Slatter
DDemocratic
Co
Bob Hasegawa
DDemocratic
Co
Claire Wilson
DDemocratic
Co
Emily Alvarado
DDemocratic
Co
Javier Valdez
DDemocratic
Co
Marcus Riccelli
DDemocratic
Co
Marko Liias
DDemocratic
Co
Noel Frame
DDemocratic
Co
Steve Conway
DDemocratic
Co
T'wina Nobles
DDemocratic
Co
Yasmin Trudeau
DDemocratic
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