| 1 Northwick Avenue, Harrow | Freehold | 136 m² | £656,000 (2022) |
| 3, Northwick Avenue, Harrow | - | 283 m² | - |
| 5, Northwick Avenue, Harrow | Freehold | 287 m² | £1,150,000 (2020) |
| 9A Northwick Avenue, Harrow | - | 72 m² | - |
| 9B Northwick Avenue, Harrow | - | 74 m² | - |
| 11, Northwick Avenue, Harrow | - | 170 m² | - |
| 13, Northwick Avenue, Harrow | Freehold | 166 m² | £695,000 (2021) |
| 17 Northwick Avenue, Harrow | Freehold | 124 m² | £415,000 (2011) |
| 19, Northwick Avenue, Harrow | Freehold | 144 m² | £800,000 (2026) |
| 21, Northwick Avenue, Harrow | Freehold | 266 m² | £260,000 (1999) |
| 23 Northwick Avenue, Harrow, Harrow | - | 145 m² | - |
| 29 Northwick Avenue, Harrow, Harrow | Freehold | 129 m² | £475,000 (2011) |
| 31, Northwick Avenue, Harrow | Freehold | 262 m² | £1,210,000 (2016) |
| 35, Northwick Avenue, Harrow | Freehold | 120 m² | £487,000 (2012) |
| 37, Northwick Avenue, Harrow | Freehold | 134 m² | £462,000 (2010) |
| 41, Northwick Avenue, Harrow | - | 87 m² | - |
| 41A, Northwick Avenue, Harrow | - | 54 m² | - |
| 47, Northwick Avenue, Harrow | Freehold | 111 m² | £640,000 (2017) |
| 49 Northwick Avenue, Harrow | - | 135 m² | - |
| 51 Northwick Avenue, Harrow | Freehold | 108 m² | £655,000 (2024) |
| 53A, Northwick Avenue, Harrow | - | 88 m² | - |
| 53B Northwick Avenue, Harrow | - | 82 m² | - |
| 55A, Northwick Avenue, Harrow | - | 91 m² | - |
| 55B, Northwick Avenue, Harrow | - | 89 m² | - |
| 55C, Northwick Avenue, Harrow | - | 85 m² | - |
| Flat 1 Anita House, 7, Northwick Avenue, Harrow | - | 83 m² | - |
| Flat 2 Anita House, 7, Northwick Avenue, Harrow | - | 58 m² | - |
| Flat 3 Anita House, 7, Northwick Avenue, Harrow | - | 40 m² | - |
| Flat 4 Anita House, 7, Northwick Avenue, Harrow | - | 74 m² | - |
