| Flat 1 Watson House, Elmgrove Road, Harrow | Leasehold | 44 m² | £113,000 (2018) |
| Flat 4 Watson House, Elmgrove Road, Harrow | - | 43 m² | - |
| Flat 5 Watson House, Elmgrove Road, Harrow | Leasehold | 92 m² | £187,500 (2019) |
| Flat 6, Watson House, Elmgrove Road, Harrow | Leasehold | 63 m² | £104,500 (2013) |
| Flat 7, Watson House, Elmgrove Road, Harrow | - | 66 m² | - |
| Flat 9 Watson House, Elmgrove Road, Harrow | - | 46 m² | - |
| Flat 10 Watson House, Elmgrove Road, Harrow | Leasehold | 68 m² | £135,000 (2014) |
| Flat 11, Watson House, Elmgrove Road, Harrow | Leasehold | 62 m² | £285,000 (2015) |
| Flat 13 Watson House, Elmgrove Road, Harrow | Leasehold | 67 m² | £116,000 (2015) |
| Flat 14, Watson House, Elmgrove Road, Harrow | Leasehold | 40 m² | £230,000 (2023) |
| Flat 15 Watson House, Elmgrove Road, Harrow | Leasehold | 47 m² | £113,000 (2018) |
| Flat 17, Watson House, Elmgrove Road, Harrow | - | 68 m² | - |
| Flat 18, Watson House, Elmgrove Road, Harrow | - | 67 m² | - |
| Flat 19 Watson House, Elmgrove Road, Harrow | Leasehold | 45 m² | £247,000 (2022) |
| Flat 20, Watson House, Elmgrove Road, Harrow | - | 42 m² | - |
| Flat 21 Watson House, Elmgrove Road, Harrow | Leasehold | 42 m² | £252,500 (2021) |
| Flat 22 Watson House, Elmgrove Road, Harrow | Leasehold | 46 m² | £114,000 (2018) |
| Flat 23 Watson House, Elmgrove Road, Harrow | - | 67 m² | - |
| Flat 24, Watson House, Elmgrove Road, Harrow | - | 66 m² | - |
| Flat 25 Watson House, Elmgrove Road, Harrow | Leasehold | 45 m² | £141,250 (2017) |
