In July 2021, there were five homes sold, with a median sale price of $500,000 - a 11.7% increase over the $447,500 median sale price for the same period of the previous year. There were six homes sold in Black Diamond in July 2020.
The median sales tax in Black Diamond for the most recent year with available data, 2016, was $3,492, approximately 0.7% of the median home sale price for July 2021.
The following table compares Black Diamond to other King County cities with similar median sale prices in July 2021:
| City | July 2021 Home Sales | July 2020 Home Sales | % change (Total Home Sales) | July 2021 Median Sales Price | July 2020 Median Sales Price | % change (Median Sales Price) |
|---|---|---|---|---|---|---|
| Carnation | 6 | 1 | 500% | $552,500 | $258,000 | 114.1% |
| Covington | 38 | 16 | 137.5% | $530,000 | $395,000 | 34.2% |
| Enumclaw | 27 | 16 | 68.8% | $520,000 | $427,475 | 21.6% |
| Pacific | 1 | 7 | -85.7% | $520,000 | $400,000 | 30% |
| Tukwila | 9 | 10 | -10% | $519,000 | $447,500 | 16% |
| Seattle (unincorporated) | 21 | 25 | -16% | $500,000 | $450,000 | 11.1% |
| Black Diamond | 5 | 6 | -16.7% | $500,000 | $447,500 | 11.7% |
| Des Moines | 18 | 25 | -28% | $500,000 | $511,000 | -2.2% |
| Seatac | 13 | 21 | -38.1% | $490,000 | $390,000 | 25.6% |
| Algona | 6 | 0 | - | $465,750 | $0 | - |
| Baring (unincorporated) | 2 | 1 | 100% | $298,125 | $313,000 | -4.8% |
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