- Parcels
- 633,329
- County FIPS
- 53033
- Snapshot
- October 30, 2026
What property data is available for King County?
| Dataset | King County |
|---|---|
| Parcel boundaries | 633,329 parcels |
| Tax assessor records | Not yet |
| Owner name and mailing address | Not yet |
| Market or assessed value | Not yet |
| Year built | Not yet |
| Last sale date | Not yet |
| Building permits | 350,129 permits since 2016, latest October 27, 2026 |
| Roofing permits | 2,574 |
| Zoning | 39 zoning jurisdictions |
| Buildable-area screens | Yes |
| Historic designations | 327 |
| Adopted building codes | 1 jurisdiction |
| Hail history (radar) | Yes, every county in the contiguous US |
How do I query King County property data?
Bulk-search every parcel in the county with `search_properties` using `state: "WA"` and `county: "033"` (the county FIPS code 53033), or look up one address with `search_parcels`. Check any single property for free with `check_availability`.
{
"name": "count_properties",
"arguments": { "state": "WA", "county": "033" }
}Frequently asked questions
How do I find who owns a property in King County?
Search the address on the King County assessor's website, or query Parceled's `search_parcels` for owner name and mailing address. See how to find a property owner by address.