In July 2020, there were six homes sold, with a median sale price of $447,500 - a 12.5% increase over the $397,700 median sale price for the same period of the previous year. There were three homes sold in Black Diamond in July 2019.
The median sales tax in Black Diamond for the most recent year with available data, 2016, was $3,492, approximately 0.8% of the median home sale price for July 2020.
The following table compares Black Diamond to other King County cities with similar median sale prices in July 2020:
| City | July 2020 Home Sales | July 2019 Home Sales | % change (Total Home Sales) | July 2020 Median Sales Price | July 2019 Median Sales Price | % change (Median Sales Price) |
|---|---|---|---|---|---|---|
| Milton | 1 | 0 | - | $475,000 | $0 | - |
| White Center (unincorporated) | 19 | 2 | 850% | $475,000 | $412,450 | 15.2% |
| Burien | 17 | 12 | 41.7% | $467,000 | $545,000 | -14.3% |
| Kent | 44 | 29 | 51.7% | $453,250 | $431,500 | 5% |
| Seattle (unincorporated) | 25 | 17 | 47.1% | $450,000 | $450,000 | 0% |
| Black Diamond | 6 | 3 | 100% | $447,500 | $397,700 | 12.5% |
| Tukwila | 10 | 6 | 66.7% | $447,500 | $441,000 | 1.5% |
| South Federal Way (unincorporated) | 5 | 1 | 400% | $440,000 | $250,000 | 76% |
| Auburn | 42 | 20 | 110% | $428,500 | $435,000 | -1.5% |
| Enumclaw | 16 | 9 | 77.8% | $427,475 | $380,950 | 12.2% |
| Auburn (unincorporated) | 13 | 12 | 8.3% | $420,000 | $329,000 | 27.7% |
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