New Homeowner Data in King County, WA | ListCentral.US

A homeowner in Phoenix worries about heat. A homeowner in King County worries about water — where it goes, what it has already damaged, and what it will do over the next winter. That single environmental fact reorders the entire service market here, and it makes a recent buyer unusually receptive to categories that barely register in drier parts of the country.

King County new homeowners data puts you in front of those buyers in their first months, which in this climate is when the list of jobs is longest.

What the data is

Recent residential purchasers across King County, built from deeds recorded with the King County Recorder's Office. Each record carries owner name, property address, mailing address, parcel ID, last sale date, last sale amount, document type, county and state. Deduplicated, delivered as CSV or Excel.

The wet-climate job list

These are the categories a new King County owner is most likely to need, and most likely to buy early:

• Roof cleaning, moss treatment and repair — moss growth is constant here and genuinely shortens roof life, which makes it an easy, inexpensive first sale that leads to larger work
• Gutter cleaning, replacement and downspout extension
• Drainage, French drains and grading — on sloped lots, which King County has in abundance, water management is the difference between a dry basement and an expensive one
• Crawl space and basement moisture control — vapour barriers, insulation, sump pumps, mould remediation
• Tree services — large conifers close to houses make winter storm risk a real and immediate concern
• Pressure washing and exterior cleaning — driveways, siding and decks
• Deck refinishing and rebuilding — wood degrades quickly in persistent damp
• Window replacement and weatherisation
• Heat pumps — increasingly the default upgrade, including retrofits into homes with older heating and no cooling
• Retaining wall construction and repair

Timing matters more here than almost anywhere

Autumn is the deadline. Anything involving roofs, gutters, drainage or trees becomes urgent as the wet season approaches, and difficult to schedule once it arrives. Use the last sale date to identify spring and summer closers and reach them in late summer or early autumn, while the work can still be done comfortably and before every contractor in the county is booked.

Conversely, winter is the season to sell interior work, and late winter is the moment to book spring exterior projects into a queue that will otherwise fill.

Coverage and sub-markets

King County includes Seattle, Bellevue, Kent, Renton, Federal Way, Kirkland, Auburn, Redmond, Sammamish, Shoreline, Burien, Issaquah, Des Moines, SeaTac, Mercer Island, Kenmore, Bothell (King portion), Tukwila, Covington, Maple Valley and Woodinville, plus unincorporated areas.

Seattle's older housing stock supports systems, seismic and renovation work. The Eastside — Bellevue, Redmond, Kirkland, Sammamish, Issaquah — carries higher price points and sustained relocation from out of state, which shows up as out-of-area mailing addresses on deeds. South King County offers more value-oriented price points and a larger share of investor purchasing.

Who uses it

• Roofing, moss-treatment and gutter companies
• Drainage, waterproofing and crawl space specialists
• Tree services and arborists
• Heat pump and HVAC contractors
• Deck builders and refinishers
• Window, siding and weatherisation firms
• Seismic retrofit and foundation contractors
• Electricians and plumbers — panel upgrades and older-home repiping
• Interior remodelers and flooring companies
• Landscapers and pressure-washing services
• Insurance agencies, mortgage professionals and Realtors

Freshness

King County snapshots are rebuilt from current county records on a monthly or weekly cadence and deduplicated before release, covering the period you select — which is what makes the seasonal timing above workable. Last reviewed: September 2026.

Cost and comparison

One-time purchases priced by record volume — commonly 200, 500 or 1,000 records — with current pricing on each product page and no subscription.

Compared with alternatives: national brokers sell volume with weaker currency; subscription platforms suit continuous multi-county access; permit data captures work already commissioned. Recorded deeds identify the ownership change, which in King County typically coincides with an inspection report full of moisture-related recommendations and a wet season approaching.

Free sample

A free New Homeowners format sample is available before purchase.

King County new homeowners — FAQ

Which office is the source?
The King County Recorder's Office, which maintains the county's recorded documents.

Does it cover Bellevue and the Eastside as well as Seattle?
Yes — all King County cities are covered in one county snapshot and can be filtered individually.

Can I identify sloped lots or homes with basements?
Not from the base file. Match parcel IDs against property-characteristic data if those attributes drive your offer.

How do I find relocating buyers?
By a mailing address outside Washington, most common on the Eastside.

Does it include Snohomish or Pierce County?
No — each is a separate snapshot, and a large share of the regional market sits in those counties.

Are phone numbers included?
No; append them through optional skip tracing.

Get King County data

Start at the New Homeowners List hub to see how the file is built, then search King County records for current snapshots. Check the format with a free sample, and use skip tracing for phone or email.

Covering the Pacific Northwest? See all Washington coverage, plus Clark County, WA and Sacramento County, CA.

Want spring and summer closers for an autumn campaign, or Snohomish and Pierce added? Email info@listcentral.us with your date range. ListCentral.US is powered by RealSuperMarket.com.