| 1 Castle Court, Castle Street, Wellingborough, Wellingborough | Leasehold | 36 m² | £47,500 (2003) |
| 19A Castle Street, Wellingborough | Freehold | 195 m² | £280,000 (2023) |
| 19B Castle Street, Wellingborough | Freehold | 133 m² | £330,000 (2022) |
| 21, Castle Street, Wellingborough | Freehold | 165 m² | £370,000 (2022) |
| 22, Castle Street, Wellingborough | Freehold | 123 m² | £269,950 (2018) |
| 23, Castle Street, Wellingborough | Freehold | 165 m² | £280,000 (2018) |
| 24 Castle Street, Wellingborough | Freehold | 117 m² | £155,000 (2011) |
| 25, Castle Street, Wellingborough | Freehold | 158 m² | £292,000 (2016) |
| 26, Castle Street, Wellingborough | Freehold | 147 m² | £400,000 (2021) |
| 27 Castle Street, Wellingborough | Freehold | 173 m² | £340,000 (2024) |
| 28 Castle Street, Wellingborough | Freehold | 153 m² | £358,500 (2023) |
| 30 Castle Street, Wellingborough | Freehold | 144 m² | £327,500 (2025) |
| 32, Castle Street, Wellingborough | Freehold | 104 m² | £178,000 (2011) |
| 34, Castle Street, Wellingborough | Freehold | 181 m² | £545,000 (2020) |
| 36, Castle Street, Wellingborough | Freehold | 196 m² | £380,000 (2024) |
| 37, Castle Street, Wellingborough | Freehold | 162 m² | £240,000 (2015) |
| 41A Castle Street, Wellingborough | - | 83 m² | - |
| 42, Castle Street, Wellingborough | - | 161 m² | - |
| 43 Castle Street, Wellingborough | Freehold | 161 m² | £300,000 (2019) |
| 45, Castle Street, Wellingborough | Freehold | 154 m² | £300,000 (2020) |
| 47 Castle Street, Wellingborough | Freehold | 183 m² | £338,035 (2025) |
| Flat 1, 19 Castle Street, Wellingborough | - | 91 m² | - |
| Flat 2 Castle Court, Castle Street, Wellingborough | Leasehold | 38 m² | £57,000 (2013) |
| Flat 2, 19 Castle Street, Wellingborough | - | 89 m² | - |
| Flat 3 Castle Court, Castle Street, Wellingborough | Leasehold | 36 m² | £27,500 (2001) |
| Flat 3, 19 Castle Street, Wellingborough | - | 42 m² | - |
| Flat 4, Castle Court, Castle Street, Wellingborough | Leasehold | 44 m² | £50,000 (2017) |
| Flat 5 Castle Court, Castle Street, Wellingborough | Leasehold | 37 m² | £105,000 (2022) |
| Flat 6, Castle Court, Castle Street, Wellingborough | Leasehold | 34 m² | £78,000 (2020) |
| Flat 7, Castle Court, Castle Street, Wellingborough | Leasehold | 35 m² | £75,000 (2006) |
| Flat 8, Castle Court, Castle Street, Wellingborough | Leasehold | 37 m² | £55,000 (2002) |
| Flat 9, Castle Court, Castle Street, Wellingborough | Leasehold | 35 m² | £106,500 (2025) |
| Flat 12 Castle Court, Castle Street, Wellingborough | Leasehold | 37 m² | £65,000 (2004) |
| Ground Floor Flat, 19 Castle Street, Wellingborough | - | 86 m² | - |