| 2, North Avenue, Letchworth Garden City | - | 69 m² | - |
| 4 North Avenue, Letchworth Garden City | Leasehold | 70 m² | £290,000 (2023) |
| 8 North Avenue, Letchworth Garden City | Freehold | 68 m² | £350,000 (2024) |
| 10, North Avenue, Letchworth Garden City | Freehold | 58 m² | £310,000 (2021) |
| 12 North Avenue, Letchworth Garden City | - | 58 m² | - |
| 14, North Avenue, Letchworth Garden City | Freehold | 56 m² | £280,000 (2024) |
| 16, North Avenue, Letchworth Garden City | Freehold | 58 m² | £360,000 (2024) |
| 18 North Avenue, Letchworth Garden City | - | 61 m² | - |
| 22, North Avenue, Letchworth Garden City | - | 70 m² | - |
| 24 North Avenue, Letchworth Garden City | - | 63 m² | - |
| 30 North Avenue, Letchworth Garden City | Leasehold | 163 m² | £275,000 (2005) |
| 32, North Avenue, Letchworth Garden City | Freehold | 133 m² | £470,000 (2016) |
| 38 North Avenue, Letchworth Garden City | Freehold | 103 m² | £247,500 (2014) |
| 44, North Avenue, Letchworth Garden City | Freehold | 141 m² | £75,000 (1997) |
| 46, North Avenue, Letchworth Garden City | Freehold | 87 m² | £380,000 (2017) |
| 48, North Avenue, Letchworth Garden City | Freehold | 98 m² | £402,000 (2020) |
| 50 North Avenue, Letchworth Garden City | Freehold | 102 m² | £625,000 (2022) |
| 52 North Avenue, Letchworth Garden City | Freehold | 176 m² | £325,000 (2017) |
| 54 North Avenue, Letchworth Garden City | Leasehold | 92 m² | £112,500 (2000) |
| 56, North Avenue, Letchworth Garden City | Freehold | 74 m² | £330,000 (2016) |
| 62, North Avenue, Letchworth Garden City | Freehold | 71 m² | £460,000 (2014) |