| 3 Washington Street, Northampton | Freehold | 70 m² | £160,000 (2017) |
| 3A, Washington Street, Northampton | - | 46 m² | - |
| 3B, Washington Street, Northampton | - | 50 m² | - |
| 5, Washington Street, Northampton | Freehold | 76 m² | £73,000 (2002) |
| 11A, Washington Street, Northampton | Freehold | 79 m² | £183,000 (2018) |
| 15, Washington Street, Northampton | Freehold | 109 m² | £295,000 (2025) |
| 41 Washington Street, Northampton | Freehold | 79 m² | £225,000 (2025) |
| 43 Washington Street, Northampton | Freehold | 71 m² | £165,000 (2019) |
| 45, Washington Street, Northampton | Freehold | 75 m² | £167,500 (2016) |
| 47 Washington Street, Northampton | Freehold | 70 m² | £100,000 (2009) |
| 49, Washington Street, Northampton | Freehold | 87 m² | £143,500 (2013) |
| 51, Washington Street, Northampton | Freehold | 70 m² | £54,995 (1998) |
| 53, Washington Street, Northampton | Freehold | 80 m² | £242,000 (2022) |
| 57, Washington Street, Northampton | Freehold | 77 m² | £155,000 (2016) |
| 59, Washington Street, Northampton | Freehold | 73 m² | £148,000 (2014) |
| 61 Washington Street, Northampton | Freehold | 73 m² | £221,000 (2026) |
| 65, Washington Street, Northampton | Freehold | 87 m² | £225,000 (2025) |
| 67, Washington Street, Northampton | Freehold | 72 m² | £122,500 (2010) |
| 69, Washington Street, Northampton | Freehold | 89 m² | £220,000 (2025) |
| 71 Washington Street, Northampton | Freehold | 85 m² | £197,500 (2025) |
| 75, Washington Street, Northampton | Freehold | 78 m² | £130,000 (2017) |
| 77 Washington Street, Northampton | Freehold | 82 m² | £227,000 (2022) |
| 83, Washington Street, Northampton | Freehold | 96 m² | £192,000 (2019) |