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Tax Sale Atlas

Mason County, WA tax sales

How tax deed sales work in Mason County, seat of Shelton: sale calendar, auction platform, over-the-counter lists, and the offices that run each sale.

New to tax sales? Read how Washington tax sales work or look terms up in the glossary.

Next sale
Once a year.
Format
Bid4Assets
County office
(360) 427-9670
Every displayed fact carries a source badge. Verified Aug 16, 2026 against official county and state pages.How we verify
On this page

How Mason County sells delinquent taxes

No tax lien certificate sale

Washington counties do not sell tax lien certificates to investors.

Tax deed sale

Bid4Assets
Run by
Mason County Treasurer
Frequency
annual
Typical timing
Once a year.
Sale list
2025 Tax Foreclosure Minimum Bid Sheet (parcel list with opening bids, PDF)
When it runs
Once a year. The county's general information sheet states: "Tax Foreclosure Sales are generally held once a year, usually in January or February, however can be as late as April." The current cycle's sale (the 2025 tax foreclosure) runs March 26-27, 2026 on Bid4Assets, per the county minimum bid sheet: "THE 2025 TAX FORECLOSURE SALE IS SCHEDULED TO BEGIN ON MARCH 26TH, 2026 WITH BID4ASSETS."
Registration and deposit

Create a free Bid4Assets account, then submit a single $1,000 bid deposit plus a $35 non-refundable processing fee by cashier's check, certified check, or wire transfer; one deposit covers every parcel in the sale. For the March 2026 sale the deposit deadline is March 20, 2026 at 1:00 PM PT. Winning bidders pay a 5% buyer's premium plus a $35 per-parcel fee, with full payment due by wire or cashier's check within two business days after the auction closes (March 31, 2026); no personal checks or credit cards.

Sale format and venue
This is Washington's deed-style tax judgment sale, not a certificate sale; the county's own sheet states Washington does not sell tax certificates. The sale follows a Mason County Superior Court Judgment and Order of Sale (the 2026 sale runs under Cause No. 25-2-00453-23, judgment issued February 23, 2026) and is conducted online only through Bid4Assets. Minimum bid equals taxes, interest, penalties, and costs. The Treasurer issues a Treasurer's Deed within 45 days of the sale, and there is no post-sale redemption except for minors or legally incompetent owners, who have three years. Parcels that do not sell go to the county as tax-title property and are re-offered at surplus sales held throughout the year as needed. The county foreclosure page lists Foreclosure Deputy Tracey Longan at ext. 485.
Register on Bid4Assets
Source: Mason County Tax Foreclosure General Information (PDF)· Verified Aug 16, 2026

Mason County tax sale list and auction calendar

For Mason County tax sale 2026 searches, use the county-run sources below rather than a copied parcel list, and confirm the parcel, registration cutoff, deposit, and payment deadline against the county before you bid.

  1. Get the advertised list

    Use 2025 Tax Foreclosure Minimum Bid Sheet (parcel list with opening bids, PDF) for the current advertised parcels, then recheck it before the auction.

  2. Register to bid

    Ask the county office how and when to register; many counties close registration days or weeks before the sale.

  3. Sale day

    Once a year. Bidding runs on Bid4Assets; check posted sale dates, registration status, and bidding windows there.

  4. Confirm with the office

    If the list, platform, and notice disagree, use Mason County Treasurer as the source to confirm which parcels are actually offered.

Before you bid in Mason County

  1. Start with the live sale list

    Pull the current advertised parcels from 2025 Tax Foreclosure Minimum Bid Sheet (parcel list with opening bids, PDF). Lists can change before the sale, so recheck the county source before you price a parcel.

  2. Confirm registration and deposit

    Create a free Bid4Assets account, then submit a single $1,000 bid deposit plus a $35 non-refundable processing fee by cashier's check, certified check, or wire transfer; one deposit covers every parcel in the sale. For the March 2026 sale the deposit deadline is March 20, 2026 at 1:00 PM PT. Winning bidders pay a 5% buyer's premium plus a $35 per-parcel fee, with full payment due by wire or cashier's check within two business days after the auction closes (March 31, 2026); no personal checks or credit cards.

  3. Check the state rules that change the bid

    Read the Washington due-diligence checklist before bidding. Redemption, liens that survive a tax deed, title cleanup, and payment deadlines can change what a parcel is worth.

  4. Set a walk-away number

    Work out what the parcel is actually worth with the rural land value estimator, then turn it into a ceiling with the tax deed max-bid calculator.

Over-the-counter (leftover) purchases

Washington counties keep no standing over-the-counter list. Parcels that draw no sufficient bid are struck to the county in trust for the taxing districts as tax-title property. The county resells that inventory under chapter 36.35 RCW, usually at a later sale at a minimum price fixed by the county legislative authority after three weeks of published notice, and in limited cases by direct sale without bids, including within twelve months after a failed auction. Whether any tax-title inventory exists, and how this county sells it, must be confirmed on the county's tax-title or surplus property page.

New to this path? Read how over-the-counter purchases work.

Use the arrow keys to switch between these sections.

County offices

Tax sale office

Mason County Treasurer

(360) 427-9670

411 N 5th St, Bldg 1, 2nd Floor, Shelton, WA 98584 (mailing: PO Box 429, Shelton, WA 98584)

Official website

County notes

  • The auction is online only via Bid4Assets; the county's link https://www.bid4assets.com/Mason currently resolves to the live March 26-27, 2026 storefront offering 20 parcels with opening bids from $5,479 and no reserve.
  • Registration deposit for the 2026 sale: $1,000 plus a $35 processing fee, due March 20, 2026 at 1:00 PM PT; Bid4Assets adds a 5% buyer's premium and a $35 per-parcel fee for winners.
  • No right of redemption after the sale except minors or persons adjudged incompetent (three years); the Treasurer's Deed records within 45 days.
  • If a parcel sells above the minimum bid, the overage becomes surplus funds the former owner can claim for three years from the sale date.
  • The Terms of Sale PDF also uses the alias http://www.bid4assets.com/MasonWA for the same Bid4Assets storefront.

Washington rules

Redemption
Any property on which a certificate of delinquency has been issued may be redeemed at any time before the close of business the day before the day of the sale. Washington has no general post-sale redemption period: once the treasurer sells the parcel, the sale is final for a competent adult owner. The one exception protects minors and persons adjudicated legally incompetent, whose property may be redeemed at any time within three years after the date of sale, on payment of the amount for which the property was sold plus interest at the statutory delinquent-tax rate from the date of sale, plus the reasonable value of improvements made in good faith on the property, less the value of their use. No fee may be charged for any redemption.
Deed deposit
For an auction conducted by electronic media, prospective bidders must deposit funds with the treasurer to participate, deposits of non-winning bidders are refunded within ten business days, and payment is by electronic funds transfer. Deposit amounts for in-person sales are set county by county, so confirm the figure on the county treasurer page or the auction platform terms.
Surplus proceeds
If the winning bid exceeds the minimum bid due on the whole property, the excess is refunded to the record owner. The record owner is the person who held title on the date the certificate of delinquency was issued. Surplus unclaimed within three years of the sale date is deposited in the county current expense fund, after which the claim is extinguished.
Governing statute
RCW Chapter 84.64

A tax deed does not convey marketable title. Most buyers file a quiet title action before they can resell or insure the property. See the due diligence guide.

See the full Washingtonrules and every county →

Frequently asked questions

Does Mason County, Washington sell tax liens or tax deeds?

Tax deeds. Washington sells no tax lien certificates to investors; the County Treasurer sells the property itself at a public tax sale.

How often does Mason County hold tax deed sales?

Mason County holds its tax deed sale once a year. Once a year. Each sale is scheduled and advertised in advance, so check the county's tax deed calendar for the next posted date.

I own a property in this sale. Can I stop it?

Often yes, by paying the overdue taxes, interest, and costs before the deadline. Washington's redemption rule: Until the close of business the day before the sale; no redemption after the sale except for minors and legally incompetent persons. Call the Mason County Treasurer as early as possible for your exact payoff and options; deadlines are strict. Free help: lawhelp.org lists legal aid programs, and consumerfinance.gov lists HUD-approved housing counselors.

Where can I find the Mason County tax sale list?

Mason County posts its tax sale list at masoncountywa.gov. Lists go up ahead of each sale and keep changing until the sale date, so confirm every parcel against the county's legal advertisement before you bid.

Verified Aug 16, 2026 against official county and state sources.

Tax Sale Atlas publishes educational information about public tax sale processes. This is not legal, financial, or investment advice. Rules, dates, and fees change; confirm with the county office before you bid.

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