King County parcel data

Parcel records for King County, Washington: owners, assessed values, sales and boundaries.
Parcels
636,727
Last updated
Sep 30, 2026
Cities and towns
35
Zoning
Not yet

What each King County parcel record includes

  • Parcel number and boundary
  • Owners of record and mailing address
  • Assessed and market value
  • Most recent sale: price, date and deed
  • Lot size, land use and property class
  • Building: year built, area and units
  • Legal description
  • Zoning district
Example parcel · King County2.14 ac
Parcel number0651-45-8213
Owner of recordExample Holdings LLC
Market value 2026$486,300
Last sale$412,000 · 2021
Land useSingle family
Year built1998

Get King County parcels through the API

Search by address, owner, lot size, value or sale date.

curl -G 'https://api.placestack.com/v1/parcel' \
  -H "Authorization: Bearer $PLACESTACK_API_KEY" \
  --data-urlencode 'fips=53033'

Frequently asked questions

How many parcels are in King County?
Placestack has 636,727 parcel records for King County, Washington.
What does a King County parcel record include?
The parcel number and boundary, owners of record and their mailing address, assessed and market value, the most recent sale, lot size, land use, the main building and the legal description.
Is King County zoning available?
Not yet for King County. Parcel records are available now.
How do I get King County parcel data?
Through the API, the MCP server or the map in the console.

Get King County parcel data

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