Current Grantham median home price: $483,710
| Date | Average price (≈) | Minimum price (⇓) | Maximum price (⇑) |
|---|---|---|---|
| 2025 September | $499,595 | $449,636 | $549,555 |
| 2025 October | $502,774 | $452,496 | $553,051 |
| 2025 November | $505,972 | $455,375 | $556,570 |
| 2025 December | $509,191 | $458,272 | $560,110 |