Sammamish, WA property records
As of November 2026, Sammamish, WA has 21,616 parcels on record, with a median assessed value of $1,574,000 and a median year built of 1992, compiled from King County assessor, treasurer, permit, FEMA, and DNR records aggregated by VetTheHome. As of November 2026, 147 of those 21,616 parcels (0.7%) sit within a FEMA Special Flood Hazard Area, per King County GIS and FEMA flood records aggregated by VetTheHome.
Updated November 2026 · refreshed weekly
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Sammamish by the numbers
Computed 11/9/2026 from county assessor, treasurer, permit, FEMA, and DNR records.
What the public records show
In the 12 months through November 2026, 580 properties in Sammamish changed hands at a median recorded sale price of $1,622,500, and 14 building permits were filed, per King County records. As of November 2026, 3,340 parcels in Sammamish (15%) rely on on-site septic systems rather than municipal sewer, per King County parcel records aggregated by VetTheHome. 489 (2.3%) of parcels in Sammamish sit in high liquefaction-susceptibility zones mapped by the Washington State DNR. As of November 2026, 290 parcels in Sammamish 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 Sammamish address below for parcel-level permit history, tax breakdown, flood and seismic hazards, and septic status.
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