From July through December of 2017, there were 18 homes sold, with a median sale price of $309,500 - a 6.7% increase over the $290,000 median sale price for the same period of the previous year. There were 27 homes sold in Islandia in the second half of 2016.
The following table compares Islandia to other Suffolk County cities with similar median sales prices in the second half of 2017:
| City | July - Dec. 2017 Home Sales | July - Dec. 2016 Home Sales | % change (Total Home Sales) | July - Dec. 2017 Median Sales Price | July - Dec. 2016 Median Sales Price | % change (Median Sales Price) |
|---|---|---|---|---|---|---|
| Centereach | 180 | 139 | 29.5% | $319,000 | $310,000 | 2.9% |
| New Suffolk | 17 | 18 | -5.6% | $315,000 | $298,500 | 5.5% |
| Moriches | 13 | 5 | 160% | $315,000 | $377,000 | -16.4% |
| Farmingville | 143 | 122 | 17.2% | $312,000 | $300,000 | 4% |
| Baywood | 57 | 48 | 18.8% | $310,000 | $255,155 | 21.5% |
| Islandia | 18 | 27 | -33.3% | $309,500 | $290,000 | 6.7% |
| East Patchogue | 57 | 33 | 72.7% | $308,000 | $300,000 | 2.7% |
| Copiague | 165 | 133 | 24.1% | $300,000 | $278,000 | 7.9% |
| Coram | 253 | 223 | 13.5% | $300,000 | $280,500 | 7% |
| Yaphank | 31 | 42 | -26.2% | $300,000 | $320,500 | -6.4% |
| Bay Shore | 160 | 120 | 33.3% | $300,000 | $286,500 | 4.7% |
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