| 5, Gladstone Road, Watford | Freehold | 31 m² | £120,000 (2000) |
| 5B Gladstone Road, Watford | Freehold | 45 m² | £9,600 (2015) |
| 5D, Gladstone Road, Watford | Leasehold | 40 m² | £125,000 (2014) |
| 7C Gladstone Road, Watford | - | 40 m² | - |
| 7D Gladstone Road, Watford | - | 33 m² | - |
| 9A, Gladstone Road, Watford | Leasehold | 38 m² | £159,000 (2014) |
| 11A Gladstone Road, Watford | Leasehold | 46 m² | £104,950 (2003) |
| 11B Gladstone Road, Watford | Leasehold | 33 m² | £71,000 (2001) |
| 11C Gladstone Road, Watford | Leasehold | 37 m² | £125,000 (2022) |
| 13A-13B, Gladstone Road, Watford | - | 30 m² | - |
| 13C, Gladstone Road, Watford | Freehold | 44 m² | £92,100 (2004) |
| 15A Gladstone Road, Watford, Watford | Leasehold | 35 m² | £116,500 (2005) |
| 15B, Gladstone Road, Watford | Leasehold | 36 m² | £104,000 (2004) |
| 15C, Gladstone Road, Watford | - | 36 m² | - |
| 17, Gladstone Road, Watford | Freehold | 146 m² | £530,000 (2019) |
| 21A Gladstone Road, Watford | Leasehold | 36 m² | £28,000 (1997) |
| 21B, Gladstone Road, Watford | Leasehold | 30 m² | £104,000 (2005) |
| 21C, Gladstone Road, Watford | Leasehold | 38 m² | £32,000 (1997) |
| 23A Gladstone Road, Watford | Freehold | 36 m² | £50,000 (1998) |
| 23C Gladstone Road, Watford | - | 33 m² | - |
| 25 Gladstone Road, Watford | Freehold | 82 m² | £210,000 (2008) |
| 27 Gladstone Road, Watford | Freehold | 45 m² | £160,000 (2006) |
| 27A Gladstone Road, Watford | - | 41 m² | - |
| 27B Gladstone Road, Watford | - | 34 m² | - |
| 29A, Gladstone Road, Watford | Leasehold | 36 m² | £134,950 (2004) |
| 29B, Gladstone Road, Watford | Leasehold | 56 m² | £144,000 (2006) |
| 31 Gladstone Road, Watford | - | 127 m² | - |
| 33A Gladstone Road, Watford | - | 39 m² | - |
| 35 Gladstone Road, Watford | Leasehold | 70 m² | £362,000 (2023) |
| 37A Gladstone Road, Watford, Watford | Leasehold | 81 m² | £305,000 (2018) |
| Basement Flat, 5A Gladstone Road, Watford | Leasehold | 43 m² | £140,000 (2010) |
| Basement Flat, 7, Gladstone Road, Watford | Leasehold | 95 m² | £149,950 (2015) |
| Flat 1, 35, Gladstone Road, Watford | Freehold | 36 m² | £48,101 (2021) |
| Flat, 9B Gladstone Road, Watford | Leasehold | 35 m² | £168,932 (2014) |
| Flat, 33B Gladstone Road, Watford | Leasehold | 35 m² | £79,950 (2002) |
| Flat, 33C Gladstone Road, Watford | Leasehold | 35 m² | £171,000 (2015) |
| Ground Floor Flat, 7 Gladstone Road, Watford | - | 33 m² | - |
| Top Floor Flat, 29 Gladstone Road, Watford | Leasehold | 36 m² | £180,000 (2015) |
