| 1, Northumberland Road, Harrow | - | 109 m² | - |
| 5, Northumberland Road, Harrow | Freehold | 99 m² | £250,000 (2007) |
| 7 Northumberland Road, Harrow | Freehold | 96 m² | £500,000 (2022) |
| 13 Northumberland Road, Harrow | Freehold | 119 m² | £500,000 (2018) |
| 15 Northumberland Road, Harrow | Freehold | 120 m² | £612,500 (2024) |
| 21 Northumberland Road, Harrow | Freehold | 149 m² | £675,000 (2025) |
| 23, Northumberland Road, Harrow | Freehold | 113 m² | £335,000 (2008) |
| 27, Northumberland Road, Harrow | - | 98 m² | - |
| 29 Northumberland Road, Harrow, Harrow | - | 127 m² | - |
| 31, Northumberland Road, Harrow | Freehold | 142 m² | £200,000 (2015) |
| 31A, Northumberland Road, Harrow | - | 74 m² | - |
| 35, Northumberland Road, Harrow | Freehold | 154 m² | £337,000 (2010) |
| 37, Northumberland Road, Harrow | Freehold | 86 m² | £234,500 (2001) |
| 43, Northumberland Road, Harrow | Freehold | 101 m² | £599,950 (2017) |
| 47 Northumberland Road, Harrow | Freehold | 113 m² | £645,000 (2023) |
| 51A Northumberland Road, Harrow | Freehold | 120 m² | £327,500 (2008) |
| 61, Northumberland Road, Harrow | Freehold | 91 m² | £565,000 (2016) |
| 63, Northumberland Road, Harrow | - | 98 m² | - |
| 73 Northumberland Road, Harrow | Leasehold | 97 m² | £660,000 (2025) |
| 75, Northumberland Road, Harrow | Freehold | 109 m² | £570,000 (2017) |
| 79, Northumberland Road, Harrow | - | 118 m² | - |
| 83 Northumberland Road, Harrow | Freehold | 165 m² | £550,000 (2020) |
| 85, Northumberland Road, Harrow | - | 119 m² | - |
| 87 Northumberland Road, Harrow | Freehold | 145 m² | £820,000 (2022) |
| 91 Northumberland Road, Harrow | Freehold | 110 m² | £710,000 (2024) |
| 93, Northumberland Road, Harrow | Freehold | 123 m² | £650,000 (2021) |
| Flat 1, 79 Northumberland Road, Harrow | - | 83 m² | - |
| Flat 2, 79 Northumberland Road, Harrow | Freehold | 70 m² | £580,000 (2017) |
| The Annexe, 25 Northumberland Road, Harrow | Freehold | 26 m² | £525,000 (2015) |
