| 3 Duncan Close, Welwyn Garden City | Freehold | 67 m² | £410,000 (2025) |
| 4, Duncan Close, Welwyn Garden City | Freehold | 67 m² | £395,000 (2020) |
| 5, Duncan Close, Welwyn Garden City | Freehold | 67 m² | £365,000 (2021) |
| 6 Duncan Close, Welwyn Garden City, Welwyn Garden City | - | 45 m² | - |
| 7 Duncan Close, Welwyn Garden City | Freehold | 46 m² | £299,600 (2021) |
| 8 Duncan Close, Welwyn Garden City | Freehold | 50 m² | £355,750 (2022) |
| 9, Duncan Close, Welwyn Garden City | Freehold | 85 m² | £360,000 (2018) |
| 10 Duncan Close, Welwyn Garden City | Freehold | 66 m² | £420,000 (2024) |
| 14, Duncan Close, Welwyn Garden City | Freehold | 67 m² | £196,000 (2011) |
| 17 Duncan Close, Welwyn Garden City | Freehold | 39 m² | £282,236 (2022) |
| 18, Duncan Close, Welwyn Garden City | Freehold | 39 m² | £244,000 (2021) |
| 19 Duncan Close, Welwyn Garden City | Freehold | 41 m² | £185,700 (2015) |
| 20 Duncan Close, Welwyn Garden City, Welwyn Garden City | Freehold | 56 m² | £113,000 (2001) |
| 21, Duncan Close, Welwyn Garden City | Freehold | 55 m² | £365,000 (2024) |
| 22, Duncan Close, Welwyn Garden City | Freehold | 56 m² | £325,000 (2019) |
| 23, Duncan Close, Welwyn Garden City | Leasehold | 53 m² | £220,000 (2020) |
| 24 Duncan Close, Welwyn Garden City | Leasehold | 45 m² | £210,000 (2022) |
| 25, Duncan Close, Welwyn Garden City | Leasehold | 54 m² | £227,000 (2017) |
| 26, Duncan Close, Welwyn Garden City | Leasehold | 54 m² | £148,000 (2004) |
| 27 Duncan Close, Welwyn Garden City | Leasehold | 49 m² | £212,500 (2023) |
| 28, Duncan Close, Welwyn Garden City | Leasehold | 56 m² | £240,000 (2020) |
| 29 Duncan Close, Welwyn Garden City, Welwyn Garden City | Leasehold | 52 m² | £247,500 (2024) |
| 30, Duncan Close, Welwyn Garden City | Leasehold | 46 m² | £188,750 (2017) |
| 31 Duncan Close, Welwyn Garden City | Leasehold | 52 m² | £49,200 (1995) |
| 32 Duncan Close, Welwyn Garden City, Welwyn Garden City | Leasehold | 54 m² | £250,000 (2026) |
| 33, Duncan Close, Welwyn Garden City | Leasehold | 50 m² | £135,000 (2007) |
| 34 Duncan Close, Welwyn Garden City | - | 56 m² | - |
| 35, Duncan Close, Welwyn Garden City | Freehold | 57 m² | £380,000 (2023) |
| 36 Duncan Close, Welwyn Garden City | - | 57 m² | - |
| 37, Duncan Close, Welwyn Garden City | Freehold | 58 m² | £375,000 (2022) |
| 38 Duncan Close, Welwyn Garden City, Welwyn Garden City | Freehold | 56 m² | £80,000 (1999) |
| 39 Duncan Close, Welwyn Garden City | Freehold | 62 m² | £315,000 (2021) |
| 40, Duncan Close, Welwyn Garden City | Freehold | 56 m² | £315,000 (2016) |
| 41 Duncan Close, Welwyn Garden City | Freehold | 63 m² | £210,000 (2012) |
| 42, Duncan Close, Welwyn Garden City | Freehold | 68 m² | £215,000 (2007) |
| 43, Duncan Close, Welwyn Garden City | Freehold | 68 m² | £114,000 (2000) |
| 44, Duncan Close, Welwyn Garden City | Freehold | 58 m² | £350,000 (2024) |
| 45 Duncan Close, Welwyn Garden City | Freehold | 46 m² | £179,000 (2012) |