Washington Rent Increase Rules: Caps, Notice Periods & Limits (2026)

Q: How much notice must a Washington landlord give before raising rent?

涨租通知：提前至少 90 天书面通知（59.18.140，2025 c 209 修订），且不得在租约期届满前生效。 补贴住房（按收入/家庭定租）：涨租通知至少 30 天（59.18.140(3)(b)）。

How much a landlord can raise rent, and what notice they must give

At a glance

Rent cap: 华盛顿 2025 年起有州级租金上限（HB 1217）：租期首 12 个月不得涨租；之后每 12 个月涨幅上限 = 7% + CPI 或 10%，取较低者；2026 上限 9.683%；落日 2040-07-01。
Statewide notice law: Yes — see the notice rules below
Governing statute: HB 1217 (2025); RCW 59.18.140

Who this covers — and who it does not

This page covers rent increases in Washington for a residential tenancy — whether there is a cap, and what notice a landlord must give.

It does not cover commercial leases, subsidised housing (which follows federal rules), or any city whose local ordinance differs from the state rule.

Is there a rent cap?

华盛顿 2025 年起有州级租金上限（HB 1217）：租期首 12 个月不得涨租；之后每 12 个月涨幅上限 = 7% + CPI 或 10%，取较低者；2026 上限 9.683%；落日 2040-07-01。

HB 1217（Rent Stabilization）：首年零涨幅；此后年涨幅上限为 min(7%+CPI, 10%)。2026-01-01 至 12-31 的计算上限为 9.683%。超过上限的房东须退还超出部分 + 合理律师费，租客可抵扣。

HB 1217 (2025); RCW 59.18.140 ↗

Notice a landlord must give

涨租通知：提前至少 90 天书面通知（59.18.140，2025 c 209 修订），且不得在租约期届满前生效。

RCW 59.18.140(3)(a) ↗

补贴住房（按收入/家庭定租）：涨租通知至少 30 天（59.18.140(3)(b)）。

RCW 59.18.140(3)(b) ↗

Local rules that override the state rule

地方可叠加更严保护（如 Seattle/Tacoma 的 just-cause 驱逐），但租金上限以州 HB 1217 为基准。

HB 1217 (2025) ↗

Sources and how to verify them

Every figure on this page comes from the official text or a state court opinion, not from a summary. The table below lists each provision used and the date it was last checked.

Statute	Last verified	Source
HB 1217 (2025); RCW 59.18.140	2026-10-16	official text ↗
RCW 59.18.140(3)(a)	2026-10-16	official text ↗
RCW 59.18.140(3)(b)	2026-10-16	official text ↗
HB 1217 (2025)	2026-10-16	official text ↗

Where the official text and a secondary summary disagree, this page follows the official text and says so. Where a provision admits of more than one reading, that is flagged rather than smoothed over.

When you need a lawyer instead of a tool

A self-help guide is the right starting point for understanding your position. Get legal help if:

You have received an eviction notice — the timeline is now court-driven
The dispute involves discrimination, unsafe conditions or retaliation
Your landlord has filed anything in court already
You are unsure whether a local ordinance changes the state rule

Local legal aid organisations and tenant unions offer free help for qualifying cases. They are independent of this site — we list them because they are the right place to go, not because they link here.

More Washington guides

Washington Security Deposit Return · Washington Security Deposit Rules · Washington Eviction Process · Washington Repairs & Habitability · Washington Landlord Retaliation

→ All Washington tenant rights topics

Common questions

Is there a rent cap in Washington?

How much notice must a Washington landlord give before raising rent?

涨租通知：提前至少 90 天书面通知（59.18.140，2025 c 209 修订），且不得在租约期届满前生效。补贴住房（按收入/家庭定租）：涨租通知至少 30 天（59.18.140(3)(b)）。