Rent increase notice in Washington

In Washington, a rent increase needs 90 days' written notice and cannot start before the lease term ends.

Checked against Washington law on Oct 28, 2026.

Earliest start for the new rent

Day you give notice

Assumes rent is due on the 1st. Where Washington law has more than one notice period, this uses the longest.

What Washington law says

How much notice does a landlord need to give for a rent increase in Washington?

In Washington, a rent increase needs 90 days' written notice and cannot start before the lease term ends.

Source: Rev. Code Wash. § 59.18.140(3)(a), read Oct 28, 2026.

Check your city's rules too: a city or county can set stricter limits. This is general information, not legal advice.

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