| 1 Castle Street, Wellingborough | Freehold | 220 m² | £315,000 (2024) |
| 1 Park View, Castle Street, Wellingborough | Leasehold | 48 m² | £40,000 (2001) |
| 2 Castle Street, Wellingborough | Leasehold | 49 m² | £75,000 (2014) |
| 4 Castle Street, Wellingborough | Leasehold | 49 m² | £70,000 (2011) |
| 6, Castle Street, Wellingborough | Leasehold | 47 m² | £80,000 (2021) |
| 7 Castle Street, Wellingborough | - | 47 m² | - |
| 8, Castle Street, Wellingborough | Leasehold | 49 m² | £130,000 (2022) |
| 10, Castle Street, Wellingborough | Leasehold | 45 m² | £62,000 (2012) |
| 11 Castle Street, Wellingborough | Leasehold | 114 m² | £70,000 (2013) |
| 11A Castle Street, Wellingborough | - | 89 m² | - |
| 11B Castle Street, Wellingborough | - | 103 m² | - |
| 11C Castle Street, Wellingborough | - | 102 m² | - |
| 11D Castle Street, Wellingborough | - | 102 m² | - |
| 12, Castle Street, Wellingborough | Leasehold | 45 m² | £77,500 (2004) |
| Flat 2, Park View, Castle Street, Wellingborough | Leasehold | 53 m² | £122,500 (2024) |
| Flat 3 Park View, Castle Street, Wellingborough | Leasehold | 47 m² | £115,000 (2024) |
| Flat 4 Park View, Castle Street, Wellingborough | - | 58 m² | - |
| Flat 5, Park View, Castle Street, Wellingborough | Leasehold | 49 m² | £78,000 (2012) |
| Flat 7 Park View, Castle Street, Wellingborough | - | 50 m² | - |
| Flat 8, Park View, Castle Street, Wellingborough | Leasehold | 58 m² | £131,000 (2023) |
| Flat 9, Park View, Castle Street, Wellingborough | Leasehold | 55 m² | £116,000 (2019) |
| Flat 10, Park View, Castle Street, Wellingborough | - | 37 m² | - |
| Flat 11 Park View, Castle Street, Wellingborough | - | 49 m² | - |
| Flat 12, Park View, Castle Street, Wellingborough | - | 55 m² | - |
