Current Deer Island median home price: $549,041
| Date | Average price (≈) | Minimum price (⇓) | Maximum price (⇑) |
|---|---|---|---|
| 2025 September | $563,207 | $506,886 | $619,528 |
| 2025 October | $566,614 | $509,953 | $623,276 |
| 2025 November | $570,042 | $513,038 | $627,046 |
| 2025 December | $573,491 | $516,142 | $630,840 |