From July through September of 2018, there were 12 homes sold, with a median sale price of $363,500 - a 5.6% decrease over the $385,000 median sale price for the same period of the previous year. There were 13 homes sold in Black Diamond in the third quarter of 2017.
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 the third quarter of 2018.
The following table compares Black Diamond to other King County cities with similar median sales prices in the third quarter of 2018:
| City | July - Sept. 2018 Home Sales | July - Sept. 2017 Home Sales | % change (Total Home Sales) | July - Sept. 2018 Median Sales Price | July - Sept. 2017 Median Sales Price | % change (Median Sales Price) |
|---|---|---|---|---|---|---|
| Kent | 98 | 109 | -10.1% | $400,000 | $370,575 | 7.9% |
| Seatac | 36 | 46 | -21.7% | $391,000 | $355,250 | 10.1% |
| Auburn | 110 | 87 | 26.4% | $387,500 | $350,000 | 10.7% |
| Federal Way | 152 | 123 | 23.6% | $385,750 | $339,000 | 13.8% |
| Auburn (unincorporated) | 44 | 48 | -8.3% | $370,000 | $346,500 | 6.8% |
| Black Diamond | 12 | 13 | -7.7% | $363,500 | $385,000 | -5.6% |
| South Federal Way (unincorporated) | 16 | 11 | 45.5% | $360,000 | $377,000 | -4.5% |
| Covington | 51 | 48 | 6.3% | $335,000 | $360,000 | -6.9% |
| Enumclaw | 29 | 22 | 31.8% | $335,000 | $336,750 | -0.5% |
| Algona | 11 | 8 | 37.5% | $320,000 | $276,350 | 15.8% |
| Pacific | 13 | 9 | 44.4% | $320,000 | $287,500 | 11.3% |
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