| 1, Hartington Close, Harrow | - | 45 m² | - |
| 2, Hartington Close, Harrow | - | 45 m² | - |
| 3 Hartington Close, Harrow | - | 45 m² | - |
| 4 Hartington Close, Harrow | - | 45 m² | - |
| 5 Hartington Close, Harrow | - | 59 m² | - |
| 6, Hartington Close, Harrow | Leasehold | 45 m² | £263,000 (2018) |
| 7, Hartington Close, Harrow | - | 44 m² | - |
| 8 Hartington Close, Harrow | - | 45 m² | - |
| 9 Hartington Close, Harrow | - | 46 m² | - |
| 10, Hartington Close, Harrow | Leasehold | 44 m² | £225,000 (2019) |
| 11 Hartington Close, Harrow | Leasehold | 45 m² | £166,500 (2007) |
| 13, Hartington Close, Harrow | Leasehold | 42 m² | £268,000 (2025) |
| 15, Hartington Close, Harrow | Leasehold | 46 m² | £252,000 (2017) |
| 16 Hartington Close, Harrow | - | 45 m² | - |
| 17, Hartington Close, Harrow | - | 45 m² | - |
| 18 Hartington Close, Harrow | - | 44 m² | - |
| 19 Hartington Close, Harrow | - | 45 m² | - |
| 20 Hartington Close, Harrow | Leasehold | 49 m² | £252,500 (2024) |
| 21 Hartington Close, Harrow | - | 45 m² | - |
| 22, Hartington Close, Harrow | - | 45 m² | - |
| 23 Hartington Close, Harrow | - | 45 m² | - |
| 24 Hartington Close, Harrow | Leasehold | 44 m² | £127,000 (2003) |
| 26 Hartington Close, Harrow | - | 90 m² | - |
| 27, Hartington Close, Harrow | - | 101 m² | - |
| 28 Hartington Close, Harrow | Leasehold | 134 m² | £224,000 (2008) |
| 29, Hartington Close, Harrow | Leasehold | 128 m² | £223,500 (2009) |
| 30, Hartington Close, Harrow | Leasehold | 107 m² | £410,000 (2017) |
| Flat 1, Thomas Hewlett House, 25 Hartington Close, Harrow | - | 38 m² | - |
| Flat 2 Thomas Hewlett House, 25, Hartington Close, Harrow | - | 38 m² | - |
| Flat 3, Thomas Hewlett House, 25 Hartington Close, Harrow | - | 38 m² | - |
| Flat 4, Thomas Hewlett House, 25 Hartington Close, Harrow | - | 38 m² | - |
| Flat 5 Thomas Hewlett House, 25, Hartington Close, Harrow | - | 40 m² | - |
| Flat 6 Thomas Hewlett House, 25, Hartington Close, Harrow | - | 38 m² | - |
| Flat 7 Thomas Hewlett House, 25, Hartington Close, Harrow | - | 38 m² | - |
| Flat 8 Thomas Hewlett House, 25, Hartington Close, Harrow | - | 46 m² | - |
| Flat 9 Thomas Hewlett House, 25, Hartington Close, Harrow | - | 43 m² | - |
| Flat 10, Thomas Hewlett House, 25 Hartington Close, Harrow | - | 38 m² | - |
| Flat 11, Thomas Hewlett House, 25 Hartington Close, Harrow | - | 38 m² | - |
| Flat 12, Thomas Hewlett House, 25 Hartington Close, Harrow | - | 38 m² | - |
| Flat 13, Thomas Hewlett House, 25 Hartington Close, Harrow | - | 40 m² | - |
| Flat 14 Thomas Hewlett House, 25, Hartington Close, Harrow | - | 39 m² | - |
| Flat 15, Thomas Hewlett House, 25 Hartington Close, Harrow | - | 38 m² | - |
| Flat 16, Thomas Hewlett House, 25 Hartington Close, Harrow | - | 40 m² | - |
| Flat 18, Thomas Hewlett House, 25 Hartington Close, Harrow | - | 38 m² | - |
| Flat 19, Thomas Hewlett House, 25 Hartington Close, Harrow | - | 38 m² | - |
| Flat 20, Thomas Hewlett House, 25 Hartington Close, Harrow | - | 38 m² | - |
| Flat 21, Thomas Hewlett House, 25 Hartington Close, Harrow | - | 38 m² | - |
| Flat 22, Thomas Hewlett House, 25 Hartington Close, Harrow | - | 38 m² | - |
| Flat 23, Thomas Hewlett House, 25 Hartington Close, Harrow | - | 38 m² | - |
| Flat 24, Thomas Hewlett House, 25 Hartington Close, Harrow | - | 38 m² | - |
| Flat 25, Thomas Hewlett House, 25 Hartington Close, Harrow | - | 38 m² | - |
| Flat 26, Thomas Hewlett House, 25 Hartington Close, Harrow | - | 38 m² | - |
| Flat 27, Thomas Hewlett House, 25 Hartington Close, Harrow | - | 42 m² | - |
| Flat 28, Thomas Hewlett House, 25 Hartington Close, Harrow | - | 38 m² | - |
| Flat 29, Thomas Hewlett House, 25 Hartington Close, Harrow | - | 48 m² | - |
| Flat 30, Thomas Hewlett House, 25 Hartington Close, Harrow | - | 42 m² | - |
