| 1 Hartington Place, Letchworth Garden City | - | 73 m² | - |
| 2, Hartington Place, Letchworth Garden City | - | 73 m² | - |
| 3 Hartington Place, Letchworth Garden City | Leasehold | 63 m² | £250,000 (2026) |
| 4, Hartington Place, Letchworth Garden City | Leasehold | 63 m² | £228,000 (2019) |
| 5, Hartington Place, Letchworth Garden City | Leasehold | 78 m² | £320,000 (2021) |
| 6 Hartington Place, Letchworth Garden City | - | 84 m² | - |
| 7, Hartington Place, Letchworth Garden City | - | 86 m² | - |
| 8 Hartington Place, Letchworth Garden City | - | 88 m² | - |
| 9 Hartington Place, Letchworth Garden City | - | 81 m² | - |
| 10 Hartington Place, Letchworth 2 | - | 91 m² | - |
| 11 Hartington Place, Letchworth Garden City | - | 100 m² | - |
| 12 Hartington Place, Letchworth Garden City | - | 101 m² | - |
| 13, Hartington Place, Letchworth Garden City | Leasehold | 106 m² | £195,000 (2013) |
| 14, Hartington Place, Letchworth Garden City | - | 65 m² | - |
| 15 Hartington Place, Letchworth Garden City | Leasehold | 75 m² | £132,500 (2023) |
| 16 Hartington Place, Letchworth Garden City | - | 68 m² | - |
| 17, Hartington Place, Letchworth Garden City | Leasehold | 74 m² | £259,995 (2017) |
| 18, Hartington Place, Letchworth Garden City | - | 65 m² | - |
| 19 Hartington Place, Letchworth Garden City | - | 52 m² | - |
| 20 Hartington Place, Letchworth Garden City | - | 51 m² | - |
| 21, Hartington Place, Letchworth Garden City | - | 48 m² | - |
| 22 Hartington Place, Letchworth Garden City | - | 61 m² | - |
| 23 Hartington Place, Letchworth Garden City | - | 59 m² | - |
| 24, Hartington Place, Letchworth Garden City | Leasehold | 73 m² | £212,500 (2015) |
| 25 Hartington Place, Letchworth Garden City | Leasehold | 67 m² | £127,500 (2021) |
| 26, Hartington Place, Letchworth Garden City | Leasehold | 67 m² | £150,000 (2013) |
| 27 Hartington Place, Letchworth Garden City | Leasehold | 63 m² | £125,000 (2019) |
| 28, Hartington Place, Letchworth Garden City | Leasehold | 61 m² | £145,000 (2012) |
| 29, Hartington Place, Letchworth Garden City | Leasehold | 50 m² | £84,000 (2022) |
| 30, Hartington Place, Letchworth Garden City | Leasehold | 50 m² | £153,750 (2021) |
| 31, Hartington Place, Letchworth Garden City | Leasehold | 46 m² | £105,000 (2018) |
| 32 Hartington Place, Letchworth Garden City | Leasehold | 49 m² | £112,500 (2026) |
| 33, Hartington Place, Letchworth Garden City | - | 61 m² | - |
| 34, Hartington Place, Letchworth Garden City | Leasehold | 61 m² | £255,000 (2017) |
| 35, Hartington Place, Letchworth Garden City | - | 61 m² | - |
| 36 Hartington Place, Letchworth Garden City | Leasehold | 66 m² | £210,000 (2023) |
| 37 Hartington Place, Letchworth Garden City | - | 49 m² | - |
| 38, Hartington Place, Letchworth Garden City | - | 61 m² | - |
| 39 Hartington Place, Letchworth Garden City | Leasehold | 49 m² | £121,000 (2022) |
| 40, Hartington Place, Letchworth Garden City | Leasehold | 61 m² | £125,000 (2019) |
| 41 Hartington Place, Letchworth Garden City | Leasehold | 86 m² | £125,000 (2020) |
| 42 Hartington Place, Letchworth Garden City | Leasehold | 69 m² | £143,000 (2024) |
| 43 Hartington Place, Letchworth Garden City | Leasehold | 84 m² | £126,000 (2026) |
| 44, Hartington Place, Letchworth Garden City | - | 65 m² | - |
| 45 Hartington Place, Letchworth Garden City | Leasehold | 79 m² | £145,000 (2026) |
| 46 Hartington Place, Letchworth Garden City | - | 151 m² | - |
| 47 Hartington Place, Letchworth Garden City | - | 107 m² | - |
| 48, Hartington Place, Letchworth Garden City | - | 94 m² | - |
| 49, Hartington Place, Letchworth Garden City | - | 94 m² | - |
| 50, Hartington Place, Letchworth Garden City | Leasehold | 94 m² | £220,000 (2013) |
| 51, Hartington Place, Letchworth Garden City | Leasehold | 94 m² | £232,500 (2013) |
| 52 Hartington Place, Letchworth Garden City | Leasehold | 159 m² | £230,000 (2013) |
| 53 Hartington Place, Letchworth Garden City | Leasehold | 100 m² | £455,000 (2026) |
| 54, Hartington Place, Letchworth Garden City | Leasehold | 94 m² | £237,000 (2013) |
| 55, Hartington Place, Letchworth Garden City | Leasehold | 94 m² | £230,000 (2013) |
| 56 Hartington Place, Letchworth Garden City | Leasehold | 89 m² | £130,000 (2024) |
| 57 Hartington Place, Letchworth Garden City | - | 71 m² | - |
| 58, Hartington Place, Letchworth Garden City | Leasehold | 63 m² | £117,500 (2018) |
| 59 Hartington Place, Letchworth Garden City | Leasehold | 73 m² | £117,500 (2019) |
| 60 Hartington Place, Letchworth Garden City | Leasehold | 85 m² | £327,000 (2025) |