King County Tax Delinquent Property List
Research tax sale properties or find owners to contact directly. King County has tax-delinquent properties tracked and scored for investors.
Buy King County List
16,426 verified records in the downloadable King County list
What the extra $12 adds
- Numeric lead score, plus a confidence figure for itscore_v2 ranks every row in the county and confidence_score (0-100) says how much evidence sits behind that rank. Sort the file and cut it where you like, instead of reading it top to bottom.score_v2, confidence_score
- Deal grade (A / B / C) on every rowThe same A/B/C grade the app filters on, in the file. The Raw list carries no grade column.score_grade
- Lien-related source flagCarries the lien-related flag supplied or derived from the county source. In Dallas this is a tax-roll delinquency flag, not a County Clerk instrument search; blank never means clear title.has_liens
- Code-violation flagSet from filed municipal violation records where the municipality publishes them — a distress signal that comes from a filing, not an inference.has_code_violations
- Available deed reference — date, type and instrument numberA source-provided deed reference where available, so you can pull the instrument for research. One reference is not a complete clerk-index search or chain of title.deed_date, deed_type, instrument_number
- Latitude and longitudeCoordinates on every row we could geocode, so the file drops straight onto a map or into a driving route.latitude, longitude
Every column above is in the Enriched file for every county. How many rows carry a value depends on what that county and its municipalities publish.
Delivered county-source file with all included rows
Fresh dataThis Enriched file contains 16,426 verified records.
Verify property and tax details with the county before acting.
Instant CSV download · 3 downloads included · 30-day access window
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Official county records. Freshness follows this county's release cycle, not a daily update.
Or download free — a 500-row sample with grades and owner names and mailing addresses where available, no credit card
500 properties sampled across all 16,426.
What brings you to King County?
Why Download the King County Owner List?
- Skip trace ready — Owner names and mailing addresses included where available
- Sorted by motivation — Properties ranked by delinquency amount and opportunity signals
- Recently collected — Current for this county's release cycle, not a daily live feed
What's Included in the King County List
How It Works
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A representative sample with grades and owner names and mailing addresses where available from King County
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Use owner names and mailing addresses where available to contact the best prospects first
Frequently Asked Questions
How often is the King County list updated?
County release schedules vary. Some counties publish weekly or monthly; others publish quarterly or annually. We update the download after collecting a new official release from County Records. A list can be current for the county's release cycle without changing every day. Verify property and tax details with the county before acting.
What owner data is included?
Each record includes property address, assessed value, years delinquent, tax owed, and property type. Owner names and mailing addresses are included where available. Pro subscribers also get numeric scores, can use skip tracing to find phone numbers and emails, and see deceased owner flags, heir indicators, and lien/judgment signals.
Is the download really free?
Yes. Create a free account and get a representative sample of the county list — real rows with deal grades and owner names and mailing addresses where available — instantly. It is a sample, not the best deals. No credit card required. Upgrade to Pro for numeric scores, heir and lien signals, all rows, map, and CRM.
Download King County List — Free
Download a representative sample of the King County list — a real cross-section with grades, addresses, tax owed, and owner names and mailing addresses where available. No credit card required.
About King County
- Region
- Washington - Major Metro
- Data Source
- County Records
- Data Status
- Available for Download
How Tax Delinquent Property Sales Work in Washington
Washington is a tax-deed state. After a property has been delinquent for three years, the county treasurer forecloses the tax lien through a court action, and once a judgment of foreclosure is entered the property is sold at public auction. The winning bidder receives fee title to the property, conveyed by a county treasurer's tax deed — not a lien certificate, so there is no interest for investors to collect. The opening (minimum) bid is the total of back taxes, interest, and costs, and bidding proceeds upward to the highest and best bid. Most Washington counties now run their foreclosure auctions online, with Bid4Assets the dominant statewide platform, though some smaller counties still sell in person at the courthouse. Because ordinary owners have essentially no right to redeem once the sale occurs, the title diligence has to happen up front — investors research each parcel before bidding rather than relying on any statutory return.
Bidding & Auctions
Auctions use a premium, highest-and-best-bid format. The opening bid is set at the total of delinquent taxes, interest, and costs, and bidders compete upward from there. Most counties conduct the sale online through Bid4Assets, which is the dominant statewide platform; a few still hold in-person sales at the county courthouse. Registration and a deposit are typically required ahead of the auction, and timing runs by county — for example, some counties post parcels in November with online bidding in early December. Since Washington is a deed state, the buyer's margin comes from parcel research and the spread between the bid and market value, not from any statutory interest rate.
Redemption & Penalties
Washington generally provides no post-sale redemption for ordinary owners. The owner's window to pay off the delinquency closes at the end of business the day before the sale (RCW 84.64.070); once the auction happens, an ordinary owner cannot recover the property. There are two narrow exceptions: a minor or a legally incompetent owner may redeem within three years of the foreclosure sale, and where a federal (IRS) tax lien attached, the United States holds a 120-day right of redemption. Foreclosure itself only becomes available after the property has been delinquent for three years. In practice this makes Washington a comparatively clean deed state, with those two edge cases being the only clawbacks.
See RCW Chapter 84.64 (Lien Foreclosure). Specific procedures vary by county — always verify with the local tax assessor/collector before bidding.
Resources for Washington - Major Metro Investors
How to Buy Tax Delinquent Property in King County
Step-by-step guide: tax sale process, redemption periods, deal types, and investor tips for Washington - Major Metro.
Read the buying guideExplore More Counties
Frequently Asked Questions
How often is the King County list updated?▾
County release schedules vary. Some counties publish weekly or monthly; others publish quarterly or annually. We update the download after collecting a new official release from County Records. A list can be current for the county's release cycle without changing every day. Verify property and tax details with the county before acting.
What data fields are included?▾
Records carry property address, owner name, mailing address, assessed value, years delinquent, tax owed, and property type, where the county publishes them. Before you pay we count out every field we have measured on this county’s file, and a field we have not measured is left out rather than estimated.
Is the download really free?▾
Yes. Create a free account and get a 500-row sample of the King County list — a real cross-section with deal grades and owner names and mailing addresses where available, instantly. It is a sample, not the best deals. No credit card required. Upgrade to Pro for numeric scores, heir and lien signals, all rows, map, and CRM.
When are Washington tax foreclosure sales held?▾
Timing varies by county, but sales are typically annual and most commonly held in November or December. Some counties post their parcel lists in November with online bidding wrapping up in early December.
Do I get the property or a lien certificate in Washington?▾
You get the property. Washington is a tax-deed state — after a court judgment of foreclosure, the county treasurer conveys fee title to the winning bidder by treasurer's deed. There is no tax-lien certificate to buy and no redemption interest to earn.
Can the former owner redeem after a Washington tax sale?▾
Generally no. Ordinary owners must redeem by close of business the day before the sale. The only post-sale exceptions are a three-year window for a minor or legally incompetent owner, and a 120-day federal redemption right where an IRS lien attached.
How are Washington tax sales conducted?▾
Most counties run the auction online through Bid4Assets, the dominant statewide platform, while some still sell in person at the courthouse. Bidding is a premium, highest-and-best format opening at the total of back taxes, interest, and costs.