| 109 North Western Avenue, Watford | - | 45 m² | - |
| 111, North Western Avenue, Watford | Leasehold | 42 m² | £227,000 (2024) |
| 111A, North Western Avenue, Watford | Leasehold | 88 m² | £250,000 (2024) |
| 113 North Western Avenue, Watford | Freehold | 50 m² | £2,500 (2019) |
| 113A North Western Avenue, Watford, Watford | Leasehold | 49 m² | £210,000 (2025) |
| 123 North Western Avenue, Watford | Freehold | 69 m² | £410,000 (2026) |
| 125 North Western Avenue, Watford | Freehold | 68 m² | £380,000 (2026) |
| 129, North Western Avenue, Watford | Freehold | 87 m² | £465,000 (2025) |
| 131, North Western Avenue, Watford | Freehold | 72 m² | £345,000 (2017) |
| 133, North Western Avenue, Watford | Freehold | 88 m² | £378,000 (2017) |
| 135 North Western Avenue, Watford | Freehold | 85 m² | £440,700 (2022) |
| 137, North Western Avenue, Watford | Freehold | 86 m² | £460,000 (2021) |
| 147, North Western Avenue, Watford | Freehold | 73 m² | £190,000 (2009) |
| 149, North Western Avenue, Watford | Freehold | 75 m² | £245,000 (2007) |
| 153 North Western Avenue, Watford | Freehold | 83 m² | £450,000 (2026) |
| 155 North Western Avenue, Watford | Freehold | 71 m² | £162,950 (2004) |
| 157 North Western Avenue, Watford | Freehold | 71 m² | £388,000 (2025) |
| 159, North Western Avenue, Watford | Freehold | 80 m² | £220,000 (2011) |
| 163 North Western Avenue, Watford, Watford | Freehold | 71 m² | £400,000 (2021) |
| Flat 1, 157 North Western Avenue, Watford | - | 13 m² | - |
| Flat 2, 157 North Western Avenue, Watford | - | 13 m² | - |
| Flat 3, 157 North Western Avenue, Watford | - | 12 m² | - |
| Flat 4, 157 North Western Avenue, Watford | - | 12 m² | - |
| Flat 5, 167 North Western Avenue, Watford | - | 41 m² | - |
| Flat 6, 167 North Western Avenue, Watford | - | 44 m² | - |
