| Flat 1, 10 Grandfield Avenue, Watford | Leasehold | 75 m² | £343,500 (2025) |
| Flat 1, 12, Grandfield Avenue, Watford | - | 52 m² | - |
| Flat 1, 14, Grandfield Avenue, Watford | Leasehold | 68 m² | £310,000 (2018) |
| Flat 2, 10 Grandfield Avenue, Watford | Leasehold | 74 m² | £335,000 (2017) |
| Flat 2, 12, Grandfield Avenue, Watford | Leasehold | 77 m² | £345,000 (2017) |
| Flat 2, 14, Grandfield Avenue, Watford | Leasehold | 68 m² | £355,000 (2019) |
| Flat 3, 12 Grandfield Avenue, Watford, Watford | Leasehold | 70 m² | £365,000 (2022) |
| Flat 3, 14, Grandfield Avenue, Watford | Leasehold | 74 m² | £350,000 (2018) |
| Flat 4, 10 Grandfield Avenue, Watford | Leasehold | 77 m² | £227,650 (2006) |
| Flat 4, 12 Grandfield Avenue, Watford | - | 64 m² | - |
| Flat 4, 14, Grandfield Avenue, Watford | Leasehold | 68 m² | £277,500 (2019) |
| Flat 5, 10, Grandfield Avenue, Watford | Leasehold | 60 m² | £280,000 (2021) |
| Flat 5, 12 Grandfield Avenue, Watford | Leasehold | 76 m² | £255,000 (2014) |
| Flat 5, 14, Grandfield Avenue, Watford | Leasehold | 67 m² | £170,000 (2009) |
| Flat 6, 10, Grandfield Avenue, Watford | Leasehold | 91 m² | £375,000 (2017) |
| Flat 6, 14, Grandfield Avenue, Watford | Leasehold | 76 m² | £379,950 (2017) |
| Flat 7, 10 Grandfield Avenue, Watford | Leasehold | 78 m² | £85,000 (1999) |
| Flat 7, 14 Grandfield Avenue, Watford | Leasehold | 69 m² | £300,000 (2024) |
| Flat 8, 14, Grandfield Avenue, Watford | Leasehold | 75 m² | £185,000 (2014) |
| Flat 9, 10, Grandfield Avenue, Watford | Leasehold | 78 m² | £335,000 (2020) |
| Flat 9, 12, Grandfield Avenue, Watford | Leasehold | 76 m² | £352,500 (2022) |
| Flat 9, 14 Grandfield Avenue, Watford, Watford | Leasehold | 74 m² | £290,000 (2015) |
