King County property data, by city
VetTheHome compiles King County, Washington property records from 20+ public sources into aggregate statistics that aren’t published anywhere else — flood exposure, on-site septic, liquefaction hazard, tax delinquency, permit activity, and home-sale trends, broken out by city and refreshed weekly. Every figure links back to the parcel-level records behind it.
Updated September 2026 · refreshed weekly
Flood exposure
Share of homes in a FEMA Special Flood Hazard Area.
0.5% of homes (~2,958)
Septic systems
Share of homes on an on-site septic system rather than municipal sewer.
14% of homes (~83,959)
Seismic / liquefaction
Share of homes in a high liquefaction-susceptibility zone.
7.8% of homes (~47,102)
Contamination proximity
Share of homes within a half-mile of an active Washington Ecology cleanup site.
41% of homes (~247,280)
Property-tax delinquency
Number of parcels with an unpaid property-tax balance on record.
11,636 across 45 cities
Building permits
Building permits filed in the last 12 months.
35,364 across 45 cities
Market activity
Recorded sales and median sale price over the last 12 months.
18,034 sales · 44 cities
Home flipping
Homes resold within 12 months of a prior sale.
245 flips, 12 mo · +40.3% median
Look up a specific address
Aggregate figures cover the King County cities in our dataset and exclude unincorporated areas; individual parcels are reported at the address level. Estimates and counts from public records — not appraisals, inspections, or legal advice. See the full methodology.