Maple Valley, WA property records
As of November 2026, Maple Valley, WA has 12,894 parcels on record, with a median assessed value of $756,500 and a median year built of 1995, compiled from King County assessor, treasurer, permit, FEMA, and DNR records aggregated by VetTheHome. As of November 2026, 147 of those 12,894 parcels (1.1%) 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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Maple Valley 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, 457 properties in Maple Valley changed hands at a median recorded sale price of $755,000, and 1 building permits were filed, per King County records. As of November 2026, 4,062 parcels in Maple Valley (32%) rely on on-site septic systems rather than municipal sewer, per King County parcel records aggregated by VetTheHome. 447 (3.5%) of parcels in Maple Valley sit in high liquefaction-susceptibility zones mapped by the Washington State DNR. As of November 2026, 190 parcels in Maple Valley 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 Maple Valley address below for parcel-level permit history, tax breakdown, flood and seismic hazards, and septic status.
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