In May 2020, there were five homes sold, with a median sale price of $545,950 - a 30% increase over the $420,000 median sale price for the same period of the previous year. There were seven homes sold in Black Diamond in May 2019.
The median sales tax in Black Diamond for the most recent year with available data, 2016, was $3,492, approximately 0.6% of the median home sale price for May 2020.
The following table compares Black Diamond to other King County cities with similar median sale prices in May 2020:
| City | May 2020 Home Sales | May 2019 Home Sales | % change (Total Home Sales) | May 2020 Median Sales Price | May 2019 Median Sales Price | % change (Median Sales Price) |
|---|---|---|---|---|---|---|
| Lake Forest Park | 8 | 11 | -27.3% | $676,997.50 | $705,000 | -4% |
| Vashon (unincorporated) | 11 | 14 | -21.4% | $630,000 | $580,000 | 8.6% |
| Lea Hill (unincorporated) | 11 | 1 | 1000% | $615,000 | $560,000 | 9.8% |
| Shoreline | 39 | 55 | -29.1% | $605,950 | $555,500 | 9.1% |
| White Center (unincorporated) | 7 | 11 | -36.4% | $600,000 | $441,750 | 35.8% |
| Black Diamond | 5 | 7 | -28.6% | $545,950 | $420,000 | 30% |
| East Renton Highlands (unincorporated) | 55 | 64 | -14.1% | $540,000 | $515,000 | 4.9% |
| North Bend (unincorporated) | 11 | 19 | -42.1% | $523,000 | $530,000 | -1.3% |
| Enumclaw (unincorporated) | 10 | 13 | -23.1% | $522,500 | $505,000 | 3.5% |
| Renton | 36 | 59 | -39% | $512,500 | $500,000 | 2.5% |
| Maple Valley | 38 | 49 | -22.4% | $507,500 | $458,000 | 10.8% |
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