Vashon, WA property records
As of September 2026, Vashon, WA has 5,438 parcels on record, with a median assessed value of $780,000 and a median year built of 1971, compiled from King County assessor, treasurer, permit, FEMA, and DNR records aggregated by VetTheHome. As of September 2026, 216 of those 5,438 parcels (4.0%) sit within a FEMA Special Flood Hazard Area, per King County GIS and FEMA flood records aggregated by VetTheHome.
Updated September 2026 · refreshed weekly
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Computed 9/7/2026 from county assessor, treasurer, permit, FEMA, and DNR records.
What the public records show
In the 12 months through September 2026, 172 properties in Vashon changed hands at a median recorded sale price of $857,500, and 2 building permits were filed, per King County records. As of September 2026, 4,934 parcels in Vashon (91%) rely on on-site septic systems rather than municipal sewer, per King County parcel records aggregated by VetTheHome. 159 (2.9%) of parcels in Vashon sit in high liquefaction-susceptibility zones mapped by the Washington State DNR. As of September 2026, 144 parcels in Vashon carried an unpaid property-tax balance with the King County Treasurer, per records aggregated by VetTheHome. Every figure here is compiled from public records and refreshed weekly; search any Vashon address below for parcel-level permit history, tax breakdown, flood and seismic hazards, and septic status.
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