King County, Washington
Explore accurate parcel and ownership records,
directly sourced from county assessors.
3,418
$804,608
2,375 sq ft
$339/sq ft
Our database includes 3,418 properties in Black Diamond.
Properties in Black Diamond average $804,608, reflecting a competitive market.
The price per square foot of $339 reflects strong property valuations in this area.
Home prices in Black Diamond are 27% lower than the King County average.
Showing 801-850 of 3,848 properties
The average home price in Black Diamond, WA is $804,608, based on analysis of 3,418 properties in our database.
Our database includes 3,418 properties in Black Diamond, WA, providing comprehensive market coverage.
The average price per square foot in Black Diamond, WA is $339. This is calculated from an average home price of $804,608 and average size of 2,375 square feet.
Homes in Black Diamond, WA average 2,375 square feet, with an average price of $804,608.
Black Diamond, WA is one of many cities in King County, WA with property data available. Browse other cities in the county to compare market conditions and pricing.
Get instant access to comprehensive county assessors-based property data with your free API key
Need Bulk Data?
Email us at hello@realie.ai
© 2026 Realie, Inc. All rights reserved.
