King County’s next tax foreclosure auction is scheduled for September 9, 2026, and the county runs this sale every September. If you’re an investor thinking of bidding for the first time, you are likely to have questions about how the auction works, and if it’s the right move for you.
A tax foreclosure auction is triggered when a property owner goes three or more years without paying property taxes. King County Treasury administers the sale under state law, not a bank or mortgage lender – a process that’s fundamentally different from a typical foreclosure. Payment is due in certified funds, there’s no guarantee of clear title, and once a bid wins, there’s no financing contingency to fall back on.
This post covers how the auction works, where to find the property list, what happens after a winning bid, and how investors can finance both the purchase and the renovation that follows.
What Is a King County Tax Foreclosure Auction?
A King County tax foreclosure auction is the county’s yearly sale of properties whose owners haven’t paid property taxes for three years or more. King County Treasury runs the sale under state law (RCW 84.64) – a different process than a bank or mortgage foreclosure.
Once a tax, fee, or lien on a property goes unpaid for a full three years, the property becomes eligible for foreclosure. King County Treasury then files a Certificate of Delinquency in King County Superior Court, and everyone with a legal interest (including the owner and any lienholders) is notified by certified mail.
A tax foreclosure isn’t the same as a mortgage foreclosure: mortgage foreclosures happen when a borrower misses loan payments to a private lender, while a tax foreclosure is handled entirely by the county.
When Is the 2026 King County Tax Foreclosure Auction?
The 2026 King County tax foreclosure auction is scheduled for September 9, 2026. This sale covers the 2025 foreclosure cycle – parcels delinquent for 2022 and earlier years.
The timeline leading up to the sale:
- February 2025: Tax statements go out, and any parcel three years delinquent becomes subject to foreclosure.
- October 31, 2025: Last day for owners to pay what they owe and avoid the November filing.
- November 20, 2025: King County files the summons, complaint, and Certificate of Delinquency in King County Superior Court.
- September 9, 2026: Auction date for the 2025 foreclosure cycle.
King County holds this auction every September, so investors can generally expect a similar schedule going forward.
Where Can Investors Find the King County Foreclosure Auction List?
King County posts two lists. The Certificate of Delinquency list, naming every parcel in the November 2025 filing, is already available. The final auction list – showing which parcels are still unredeemed, along with opening bids – goes up mid to late August 2026.
The November 2025 list includes every parcel that was three years delinquent at that time, but most won’t reach auction. King County posts an updated list online and at its Customer Service Center in mid-November, then adds opening bids in mid to late August.
That’s because owners can redeem their property right up until the close of business the day before the auction. The list keeps shrinking as owners pay what they owe, so investors working from an early version should expect it to shrink by September 9.
Can Property Owners Redeem Before the Sale?
Yes. Under state law (RCW 84.64.070), owners and anyone with a recorded legal interest can redeem a property any time up to the close of business the day before the auction, by paying all delinquent taxes, interest, penalties, and foreclosure costs in full.
This right explains a lot about what shows up at auction. Owners of improved properties tend to redeem most often, and frequently at the last minute – leaving auction inventory leaning toward vacant land, oddly shaped lots, and lower-value parcels rather than move-in-ready homes.
The one narrow exception: former owners who were minors or legally incompetent at the time of the sale have three years afterward to redeem, by paying the sale price, plus interest and the cost of any improvements the new owner made.
How Does Bidding and Payment Work?
King County’s tax foreclosure auction is conducted online through RealAuction, at king.wa.realforeclose.com. The sale goes to the highest bidder, full payment is due in certified funds, and every parcel is sold where-is and as-is, with no guarantee of title or condition.
Bidder registration and deposit requirements for the 2026 sale will post on King County’s auction page in mid to late August 2026. Since the county makes no guarantee about a parcel’s title or condition, it explicitly urges bidders to research any property on their own before bidding.
Payment terms are firm: full payment in certified funds is due at the time specified in the terms of sale, with no financing contingency and no extended closing window.
What Happens After You Win a Parcel?
A Treasurer’s Tax Deed is issued within sixty days of the sale and forwarded to the King County Recorder’s Office. The deed carries no guarantee of clear title, and if the parcel sells for more than the taxes owed, that surplus goes to the previous owner (not the winning bidder) for up to three years.
Title risk carries forward too. The deed offers no protection against clouded title or other problems the county wasn’t aware of – those become the new owner’s responsibility. Prior liens aren’t automatically extinguished by the sale either; defending against a lienholder’s claim falls to the new owner under RCW 84.64.080.
Parcels offered at auction but not bid on don’t disappear – they become county-owned tax title properties, handled through a separate Real Estate Services process.
Tax Deed Sales vs. Traditional Property Purchases in Washington
A Washington tax deed sale differs from a typical on-market purchase in several ways:
- No inspection contingency. Properties are sold as-is, and in most cases, sight-unseen.
- No standard title insurance at the time of sale. Buyers typically need to complete a quiet title action – a court process that clears up ownership disputes – before title insurance becomes available.
- No financing contingency. Certified funds are due according to the terms of sale, not after a mortgage underwriting period.
- No standard escrow closing. Payment happens on the county’s timeline, not the multi-week process buyers may be used to.
For investors used to conventional deals, this is the biggest shift: the protections built into a standard purchase aren’t part of the process.
Why Are Investors Watching King County’s 2026 Auction?
King County’s housing market stayed tight and expensive heading into the 2026 auction. The median single-family home price hit $915,000 in Q1 2026, with only 2.4 months of supply – the second-highest price in the state, behind San Juan County. Single-family sales were down 4% year-over-year, and the county’s affordability index of 65 means the typical household had just 65% of the income needed to buy a median-priced home.
These conditions are pushing more buyers toward investor-driven channels. Nationally, investors made up about 29% of single-family home purchases in June 2025, up from 25% the year before. Bank and lender foreclosure filings also rose 14% in 2025, though tax foreclosure auctions remain a separate, smaller path to acquiring property.
How Are Tax Deed Purchases Typically Financed?
Because King County requires full payment in certified funds on auction day, tax foreclosure purchases are largely a cash game. There’s no financing contingency, and no standard closing window to arrange a loan after the fact.
Title risk compounds this. Since tax deed properties come with no guarantee of clear title and no title insurance at time of sale, most lenders won’t extend acquisition or rehab financing until a quiet title action has resolved any ownership disputes – a process that can take months. That makes tax foreclosure auctions a different kind of opportunity than other foreclosure investing: one that generally requires cash reserves for the bid itself, with financing options opening up later once title is settled.
Investing in Non-Judicial Foreclosure Auctions
Investors looking for foreclosure opportunities with financing available have another option: non-judicial (trustee sale) foreclosure auctions, which are held every Friday in Washington State. Unlike tax deed sales, these auctions involve properties foreclosed on by a lender, and financing can be arranged ahead of time.
Eastside Funding’s Foreclosure Auction Loan Program allows investors to bid at these weekly non-judicial sales with 10% down while financing the remaining 90%, with same-day funding available after a successful bid. Once a property is won, the Rehab Loan Program funds renovation as a back-filled line of credit with interest-only draws, and the Bridge Loan Program provides short-term capital for investors who need to transition out of a property quickly. Both programs serve non-owner-occupied investment property in Washington State.
Key Risks to Understand Before Bidding at a Washington Tax Deed Sale
Tax deed sales carry risks that on-market purchases don’t. Before bidding at a King County or any Washington county auction, weigh the following:
- No warranty of title or condition. King County makes no guarantee about a parcel’s clear title or physical state.
- Prior liens may survive the sale, and defending against them becomes the new owner’s responsibility.
- No inspection access before bidding, and no financing contingency once a bid wins.
- Inventory skews toward lower-value parcels, since most improved, move-in-ready homes redeem before the sale.
- Payment terms are strict: full payment in certified funds is due per the terms of sale, so financing must be arranged in advance.
None of this makes a tax deed sale a bad opportunity – it just means doing the homework before auction day, not after.
Preparing for a tax foreclosure auction takes more planning than a typical purchase, and financing is part of it. Eastside Funding works with real estate investors buying at tax foreclosure and other auctions across King County and Washington State, from the bid through what comes after.
The Foreclosure Auction Loan Program allows investors to bid with 10% down. Once a property is won, the Rehab Loan Program and Bridge Loan Program provide financing for renovation, holding, or resale, depending on the plan for the property.
If you’re preparing for the September 9, 2026 auction, contact our team to talk through financing ahead of time.
