| 9, Portland Avenue, Sittingbourne | - | 172 m² | - |
| 11, Portland Avenue, Sittingbourne | Freehold | 95 m² | £205,000 (2022) |
| 12, Portland Avenue, Sittingbourne | - | 66 m² | - |
| 13, Portland Avenue, Sittingbourne | - | 95 m² | - |
| 14, Portland Avenue, Sittingbourne | - | 90 m² | - |
| 15 Portland Avenue, Sittingbourne | - | 77 m² | - |
| 16, Portland Avenue, Sittingbourne | - | 76 m² | - |
| 17 Portland Avenue, Sittingbourne | - | 77 m² | - |
| 18 Portland Avenue, Sittingbourne | Freehold | 72 m² | £43,000 (1999) |
| 19, Portland Avenue, Sittingbourne | Freehold | 72 m² | £120,000 (2011) |
| 20, Portland Avenue, Sittingbourne | - | 74 m² | - |
| 21, Portland Avenue, Sittingbourne | Freehold | 74 m² | £91,000 (2003) |
| 22 Portland Avenue, Sittingbourne | - | 73 m² | - |
| 23 Portland Avenue, Sittingbourne | Freehold | 68 m² | £260,000 (2025) |
| 24 Portland Avenue, Sittingbourne | Freehold | 81 m² | £197,000 (2021) |
| 26 Portland Avenue, Sittingbourne | - | 68 m² | - |
| 27, Portland Avenue, Sittingbourne | Freehold | 84 m² | £140,000 (2007) |
| 28 Portland Avenue, Sittingbourne | Freehold | 70 m² | £124,500 (2007) |
| 29, Portland Avenue, Sittingbourne | - | 92 m² | - |
| 30 Portland Avenue, Sittingbourne | - | 75 m² | - |
| 33, Portland Avenue, Sittingbourne | Freehold | 68 m² | £51,000 (2000) |
| 34, Portland Avenue, Sittingbourne | - | 84 m² | - |
| 35 Portland Avenue, Sittingbourne | Freehold | 81 m² | £258,000 (2024) |
| 36, Portland Avenue, Sittingbourne | - | 92 m² | - |
| 39 Portland Avenue, Sittingbourne | - | 71 m² | - |
| 40, Portland Avenue, Sittingbourne | - | 80 m² | - |
| 42, Portland Avenue, Sittingbourne | Freehold | 73 m² | £220,000 (2020) |
| 43, Portland Avenue, Sittingbourne | - | 80 m² | - |
| 44 Portland Avenue, Sittingbourne | - | 73 m² | - |
| 45, Portland Avenue, Sittingbourne | Freehold | 76 m² | £191,000 (2020) |
| 48 Portland Avenue, Sittingbourne | Freehold | 74 m² | £131,500 (2009) |
| 56 Portland Avenue, Sittingbourne | Freehold | 80 m² | £245,000 (2024) |
| 62, Portland Avenue, Sittingbourne | - | 77 m² | - |
| 64, Portland Avenue, Sittingbourne | - | 81 m² | - |
| 66 Portland Avenue, Sittingbourne | - | 64 m² | - |
| 70 Portland Avenue, Sittingbourne | - | 72 m² | - |
| 72 Portland Avenue, Sittingbourne | Freehold | 81 m² | £247,000 (2022) |
| 74 Portland Avenue, Sittingbourne | Freehold | 91 m² | £265,000 (2026) |
| 76, Portland Avenue, Sittingbourne | Freehold | 81 m² | £242,000 (2024) |
| 82 Portland Avenue, Sittingbourne | - | 76 m² | - |
| 84, Portland Avenue, Sittingbourne | - | 80 m² | - |
| The Rectory, 9 Portland Avenue, Sittingbourne | - | 169 m² | - |