Washington smoke detector rules for landlords: you install, the tenant maintains, you check at turnover

Who installs the device, and in which units?

The owner is responsible for installation. The requirement covers dwelling units occupied by someone other than the owner on or after December 31, 1981, units built or manufactured in Washington after December 31, 1980, and units sold on or after July 1, 2019. For a unit sold on or after July 1, 2019 that lacks a device, the seller must provide at least one before the buyer or anyone else moves in. Interconnection is not required where it is not already present in a building undergoing repairs solely as a condition of sale.

Who keeps it working?

Tenants handle maintenance, including replacing batteries where needed, and the device is kept "as specified by the manufacturer." The owner has one specific duty tied to turnover: when a unit is vacant, the owner must make sure the device is operational before the unit is reoccupied. The section does not set a testing schedule, so your own schedule is what you will be asked about.

Example a made-up owner in Vancouver, Washington has a tenant leave on the 31st. The owner tests the device on the 2nd, photographs the test button and the date on a note, and the next tenant moves in on the 5th. The file shows the device was operational before reoccupancy.

What are the penalties?

• Owners, sellers or tenants who fail to comply face a fine of up to $200.
• Owners face a $5,000 fine if, after a violation, a fire causes property damage, injury or death to a tenant or household member.
• Fire chiefs (cities and towns) or county fire marshals (unincorporated areas) enforce the higher fine, and only after a fire.

The section does not mention carbon monoxide alarms, so any CO duty comes from another source that an owner should check with the local fire authority.

What belongs in your move-in and turnover records?

1. The date you tested each device and the result.
2. A photo of the device in place.
3. The manufacturer's instructions, handed to the tenant at move-in.
4. A note telling the tenant that battery replacement is theirs, and who to call if the device fails.

Where Washington owners slip

The usual miss is the vacant-unit check. A unit that sits empty for two weeks between tenants can have a dead battery or a removed device, and the statute puts the check on the owner before the next person moves in. Another slip is assuming the tenant's battery duty ends your responsibility: if the device is missing, damaged or does not work after a battery change, the owner is the one who must act. Keep a standing turnover checklist with the device test as its own line, and sign and date it. If a fire ever happens in a unit you own, the first question will be whether the device was operational when the tenant took possession, and that line answers it.

How DoorKeeping fits in Washington

DoorKeeping keeps a Washington unit's alarm checks as dated work orders with photos, so the move-in test, the tenant's reports and your fixes are on the record. A turnover checklist with a device test line can be attached to every vacated unit. This is general information, not legal advice. Check the current statute, your local fire code and your lease before you act.

Sources

1. RCW 43.44.110, Smoke detection devices in dwelling units (Washington State Legislature), read Oct 30, 2026

Questions

Who installs smoke detectors in a Washington rental?

The owner is responsible for installation under RCW 43.44.110.

Who replaces batteries in a Washington rental?

Tenants handle maintenance, including battery replacement where needed. The owner must make sure the device is operational before a vacant unit is reoccupied.

What is the penalty in Washington?

A fine of up to $200 for noncompliance, and up to $5,000 for an owner if, after a violation, a fire causes damage, injury or death to a tenant or household member.