ZIP 98109, WA property records
As of September 2026, ZIP 98109, WA has 3,821 parcels on record, with a median assessed value of $1,482,500 and a median year built of 1925, compiled from King County assessor, treasurer, permit, FEMA, and DNR records aggregated by VetTheHome. As of September 2026, 0 of those 3,821 parcels (0.0%) sit within a FEMA Special Flood Hazard Area, per King County GIS and FEMA flood records aggregated by VetTheHome.
Updated September 2026 · refreshed weekly
Search an address in 98109
ZIP 98109 by the numbers
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, 133 properties in ZIP 98109 changed hands at a median recorded sale price of $1,450,000, and 538 building permits were filed, per King County records. As of September 2026, 1 parcels in ZIP 98109 (0.0%) rely on on-site septic systems rather than municipal sewer, per King County parcel records aggregated by VetTheHome. 25 (0.7%) of parcels in ZIP 98109 sit in high liquefaction-susceptibility zones mapped by the Washington State DNR. As of September 2026, 70 parcels in ZIP 98109 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 ZIP 98109 address below for parcel-level permit history, tax breakdown, flood and seismic hazards, and septic status.
Other King County ZIP codes
Washington city records
Explore aggregate King County property data by city — flood, septic, permits, taxes and more.