How a 20-Day Notice to Vacate Works in Washington State

In Washington State, a 20-day notice to vacate is the written notice a month-to-month tenant gives the landlord to end the tenancy. Under the current version of RCW 59.18.200, the 20-day notice is a tenant tool only.¹ Landlords can no longer end a month-to-month tenancy with a 20-day no-cause notice. Washington’s statewide just cause eviction law, codified at RCW 59.18.650, requires one of several specific grounds before a landlord can force a tenant out, and each ground has its own notice period.² Getting that distinction wrong is the single biggest source of confusion on this topic.

How a Tenant Gives a 20-Day Notice

If you rent month-to-month and want to leave, give your landlord written notice at least 20 days before the end of your current rental period. The notice has to be in writing, and it must specify the date the tenancy will end.¹

The end date needs to line up with the end of a rental period. If rent is due on the first of the month, your termination date should be the last day of a month, and the notice needs to reach the landlord at least 20 days before that date. A notice served on the 15th, for example, is too late to end the tenancy on the last day of that same month if rent is monthly.

A written notice should identify the rental address, state the exact date the tenancy will end, and be signed and dated. Keep a copy for yourself.

Military Exception

If you or your spouse is an active member of the armed forces, including the National Guard and reserves, and you receive permanent change-of-station or deployment orders that don’t allow for 20 days, you can give shorter notice.¹

Why a Landlord Can’t Send You a 20-Day No-Cause Notice

Older versions of Washington law allowed either party to end a month-to-month tenancy with 20 days’ notice and no reason given. That symmetry is gone. Under RCW 59.18.650, a landlord cannot evict a tenant, refuse to continue a tenancy, or end a periodic tenancy except for causes listed in the statute.² This covers month-to-month tenancies as well as fixed-term leases that have rolled over into periodic tenancies.

There is one narrow exception. If a landlord and tenant signed a fixed-term lease of six to twelve months that will convert to month-to-month at the end, the landlord can decline to renew at the end of that initial fixed term without stating cause, but only with at least 60 days’ advance written notice before the initial term expires.² Once the tenancy has already become month-to-month, that window is closed and just cause is required.

Some Washington cities, including Seattle, have their own just cause ordinances that add local protections. Where local rules are stricter, the stricter standard applies.

What Notice a Landlord Can Send Instead

Because a 20-day landlord notice isn’t a valid option, landlords have to use one of the specific grounds and matching notice periods spelled out by statute. If you’ve received a notice from your landlord and are trying to figure out whether it’s proper, the notice period is one of the first things to check.

At-Fault Grounds

Nonpayment of rent: a 14-day notice to pay or vacate, which must itemize the specific amounts owed by rent, utilities, and any other recurring charges identified in the lease.³
Lease violations: written notice describing the specific breach with at least 10 days to fix it.²
Waste, nuisance, or illegal activity affecting neighbors: at least three days’ advance written notice to quit.²
Drug-related or gang-related activity: the landlord can skip the notice-and-cure process and go straight to filing an unlawful detainer action.⁴

No-Fault Grounds

These apply when the landlord has a legitimate reason unrelated to the tenant’s behavior. The notice periods are longer to give tenants time to find new housing.

Owner or immediate-family move-in: 90 days’ notice, and no equivalent unit can be available in the same building. The owner must actually move in and stay at least 60 consecutive days within the first 90 days after the tenant leaves, or a bad-faith presumption arises.²
Sale of a single-family home: 90 days’ notice. The owner must make reasonable efforts to list the property within 30 days after the tenant leaves; failing to list it or withdrawing it within 90 days creates a presumption the sale intent was not genuine.²
Demolition or substantial rehabilitation, or change of use: 120 days’ written notice.¹
Condominium conversion: 120 days’ written notice.¹
Condemned or uninhabitable premises certified by a government agency: 30 days’ advance written notice.²

A landlord who invokes a move-in or sale ground and then doesn’t follow through faces real legal exposure. Tenants who suspect the reason was fabricated should document what they can.

How the Notice Has to Be Delivered

Content only gets you so far. Delivery method matters just as much, and this is true of a tenant’s 20-day notice as well as any notice a landlord serves. Under RCW 59.12.040, service can be by:

Personal delivery, handing the notice directly to the other party.
Leaving a copy with a person of suitable age and discretion at the premises when the recipient is absent, plus mailing a copy by certified mail from within Washington.
Posting in a conspicuous place on the premises when no one is available, plus mailing a copy.

When service is by mail, the mailing must be by certified mail posted from within Washington State, and five additional days are added before any action can be taken based on that notice.⁵ First-class mail alone is not enough. A notice that skips these steps often collapses on its own procedural defects.

What Happens If the Tenant Doesn’t Leave

If a tenant remains after a valid termination notice, the landlord’s only legal path is filing an unlawful detainer action in superior court. Self-help evictions, like changing the locks or shutting off utilities, are illegal in Washington regardless of how solid the landlord’s underlying case may be. From filing, the court sets a show cause hearing no fewer than 7 and no more than 30 days after the tenant is served.⁶

Security Deposit After You Move Out

However the tenancy ends, whether by your own 20-day notice or by one of the landlord’s grounds, the landlord has 30 days after you vacate to return your security deposit or provide a written, itemized statement of any deductions. The statement must include copies of estimates or invoices supporting damage claims. If the landlord or their own employees performed the repairs, the statement must include the time spent and the hourly rate charged.⁷

A landlord who misses that 30-day deadline becomes liable for the full deposit amount and loses the right to claim any part of it, unless circumstances beyond their control caused the delay.⁷ Give the landlord your forwarding address in writing when you leave, and if you don’t receive your deposit or an itemized statement within 30 days, send a written demand and consider small claims court.

1
Washington State Legislature. RCW 59.18.200 – Tenancy From Month to Month or for Rental Period – End of Tenancy
2
Washington State Legislature. RCW 59.18.650 – Eviction of Tenant, Refusal to Continue Tenancy, End of Periodic Tenancy – Cause – Notice – Penalties
3
Washington State Legislature. RCW 59.18.057 – Notice – Form
4
Washington State Legislature. Washington Code 59.18.180 – Tenants Failure to Comply With Statutory Duties – Landlords Remedies
5
Washington State Legislature. Washington Code 59.12.040 – Service of Notice – Proof of Service
6
Washington State Legislature. RCW 59.18.370 – Forcible Entry or Detainer or Unlawful Detainer – Show Cause Hearing
7
Washington State Legislature. RCW 59.18.280 – Moneys Paid as Deposit or Security for Performance