| 1, Knella Green, Welwyn Garden City | - | 67 m² | - |
| 3 Knella Green, Welwyn Garden City | Freehold | 55 m² | £175,000 (2007) |
| 4 Knella Green, Welwyn Garden City | - | 63 m² | - |
| 5 Knella Green, Welwyn Garden City | - | 63 m² | - |
| 6 Knella Green, Welwyn Garden City | - | 63 m² | - |
| 7, Knella Green, Welwyn Garden City | Freehold | 62 m² | £415,000 (2024) |
| 8 Knella Green, Welwyn Garden City | Freehold | 67 m² | £215,400 (2021) |
| 9 Knella Green, Welwyn Garden City | - | 72 m² | - |
| 11 Knella Green, Welwyn Garden City | - | 63 m² | - |
| 14 Knella Green, Welwyn Garden City | Freehold | 70 m² | £432,500 (2025) |
| 15 Knella Green, Welwyn Garden City | - | 83 m² | - |
| 16 Knella Green, Welwyn Garden City | - | 63 m² | - |
| 18 Knella Green, Welwyn Garden City | Freehold | 74 m² | £410,000 (2022) |
| 19 Knella Green, Welwyn Garden City | Freehold | 68 m² | £315,000 (2021) |
| 20 Knella Green, Welwyn Garden City | - | 63 m² | - |
| 21, Knella Green, Welwyn Garden City | - | 67 m² | - |
| 23, Knella Green, Welwyn Garden City | Freehold | 68 m² | £335,000 (2018) |
| 25, Knella Green, Welwyn Garden City | - | 75 m² | - |
| 26, Knella Green, Welwyn Garden City | - | 67 m² | - |
| 27 Knella Green, Welwyn Garden City | - | 63 m² | - |
| 28 Knella Green, Welwyn Garden City | - | 65 m² | - |
| 29 Knella Green, Welwyn Garden City | - | 65 m² | - |
| 30, Knella Green, Welwyn Garden City | Freehold | 86 m² | £310,000 (2021) |
| 31 Knella Green, Welwyn Garden City | - | 63 m² | - |
| 35 Knella Green, Welwyn Garden City | - | 71 m² | - |
| 36, Knella Green, Welwyn Garden City | Freehold | 67 m² | £347,500 (2021) |
