In July 2017, there were four homes sold, with a median sale price of $359,625 - a 9% decrease over the $395,000 median sale price for the same period of the previous year. There were seven homes sold in Black Diamond in July 2016.
The median sales tax in Black Diamond for the most recent year with available data, 2016, was $3,492, approximately 1% of the median home sale price for July 2017.
The following table compares Black Diamond to other King County cities with similar median sales prices in July 2017:
| City | July 2017 Home Sales | July 2016 Home Sales | % change (Total Home Sales) | July 2017 Median Sales Price | July 2016 Median Sales Price | % change (Median Sales Price) |
|---|---|---|---|---|---|---|
| Kent (unincorporated) | 20 | 53 | -62.3% | $386,250 | $340,000 | 13.6% |
| Kent | 44 | 72 | -38.9% | $375,000 | $330,000 | 13.6% |
| Covington | 14 | 48 | -70.8% | $367,500 | $340,475 | 7.9% |
| White Center (unincorporated) | 8 | 18 | -55.6% | $360,000 | $377,500 | -4.6% |
| Seatac | 15 | 24 | -37.5% | $360,000 | $288,250 | 24.9% |
| Black Diamond | 4 | 7 | -42.9% | $359,625 | $395,000 | -9% |
| Seattle (unincorporated) | 15 | 28 | -46.4% | $355,250 | $401,500 | -11.5% |
| Enumclaw | 6 | 9 | -33.3% | $347,500 | $285,000 | 21.9% |
| Auburn (unincorporated) | 13 | 30 | -56.7% | $344,000 | $309,000 | 11.3% |
| Algona | 2 | 4 | -50% | $339,000 | $245,644.50 | 38% |
| Tukwila | 4 | 14 | -71.4% | $330,750 | $312,950 | 5.7% |
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