| 1 Williamsburg Avenue, Harwich | - | 89 m² | - |
| 3 Williamsburg Avenue, Harwich | - | 88 m² | - |
| 5 Williamsburg Avenue, Harwich | - | 88 m² | - |
| 7 Williamsburg Avenue, Harwich | - | 99 m² | - |
| 9 Williamsburg Avenue, Harwich | - | 99 m² | - |
| 11 Williamsburg Avenue, Harwich | - | 87 m² | - |
| 13 Williamsburg Avenue, Harwich | - | 87 m² | - |
| 15 Williamsburg Avenue, Harwich | - | 87 m² | - |
| 17 Williamsburg Avenue, Harwich | - | 87 m² | - |
| 19 Williamsburg Avenue, Harwich | - | 121 m² | - |
| 21 Williamsburg Avenue, Harwich | - | 121 m² | - |
| 23 Williamsburgh Avenue, Harwich | - | 99 m² | - |
| 25 Williamsburgh Avenue, Harwich | - | 99 m² | - |
| 27 Williamsburgh Avenue, Harwich | - | 72 m² | - |
| 27A Williamsburg Avenue, Harwich | - | 88 m² | - |
| 27B Williamsburgh Avenue, Harwich | - | 89 m² | - |
| 27C Williamsburgh Avenue, Harwich | - | 72 m² | - |
| 29 Williamsburg Avenue, Harwich | - | 121 m² | - |
| 31 Williamsburg Avenue, Harwich | - | 72 m² | - |
| 31A Williamsburg Avenue, Harwich | - | 96 m² | - |
| 31B Williamsburg Avenue, Harwich | - | 72 m² | - |
| 33 Williamsburg Avenue, Harwich | - | 87 m² | - |
| 35 Williamsburg Avenue, Harwich | - | 87 m² | - |
| 37 Williamsburg Avenue, Harwich | Freehold | 68 m² | £215,000 (2023) |
| 39, Williamsburg Avenue, Harwich | Freehold | 81 m² | £175,000 (2017) |
| 41, Williamsburg Avenue, Harwich | Freehold | 82 m² | £205,000 (2019) |
| 43, Williamsburg Avenue, Harwich | Freehold | 87 m² | £200,000 (2020) |
| 45, Williamsburg Avenue, Harwich | Freehold | 76 m² | £149,995 (2014) |
| 47 Williamsburg Avenue, Harwich | Freehold | 86 m² | £257,000 (2025) |
| 51, Williamsburg Avenue, Harwich | Freehold | 85 m² | £217,500 (2019) |
| 53 Williamsburg Avenue, Harwich | Freehold | 88 m² | £247,000 (2022) |
| 55 Williamsburg Avenue, Harwich | Freehold | 86 m² | £202,000 (2018) |
| 57 Williamsburg Avenue, Harwich | Freehold | 86 m² | £240,000 (2025) |
| 59, Williamsburg Avenue, Harwich | Freehold | 90 m² | £225,000 (2019) |
| 61 Williamsburg Avenue, Harwich | - | 81 m² | - |
| 63 Williamsburg Avenue, Harwich | - | 84 m² | - |
| 65 Williamsburg Avenue, Harwich | Freehold | 74 m² | £234,000 (2026) |