| 21, Boundary Lane, Welwyn Garden City | Freehold | 90 m² | £350,000 (2014) |
| 23 Boundary Lane, Welwyn Garden City | - | 86 m² | - |
| 25, Boundary Lane, Welwyn Garden City | Freehold | 65 m² | £245,000 (2014) |
| 27, Boundary Lane, Welwyn Garden City | - | 73 m² | - |
| 29, Boundary Lane, Welwyn Garden City | Freehold | 67 m² | £285,500 (2015) |
| 31, Boundary Lane, Welwyn Garden City | - | 74 m² | - |
| 33 Boundary Lane, Welwyn Garden City | - | 73 m² | - |
| 37, Boundary Lane, Welwyn Garden City | - | 70 m² | - |
| 39 Boundary Lane, Welwyn Garden City | - | 73 m² | - |
| 43, Boundary Lane, Welwyn Garden City | Freehold | 77 m² | £382,000 (2020) |
| 45 Boundary Lane, Welwyn Garden City | Freehold | 73 m² | £417,500 (2024) |
| 47 Boundary Lane, Welwyn Garden City | - | 70 m² | - |
| 51, Boundary Lane, Welwyn Garden City | Freehold | 109 m² | £472,000 (2021) |
| 53, Boundary Lane, Welwyn Garden City | Freehold | 104 m² | £250,000 (2004) |
| 57 Boundary Lane, Welwyn Garden City | - | 93 m² | - |
| 59 Boundary Lane, Welwyn Garden City | - | 70 m² | - |
| 61 Boundary Lane, Welwyn Garden City | Freehold | 80 m² | £445,000 (2025) |
| 63, Boundary Lane, Welwyn Garden City | Freehold | 83 m² | £367,500 (2018) |
| 65 Boundary Lane, Welwyn Garden City | - | 70 m² | - |
| 67 Boundary Lane, Welwyn Garden City | Freehold | 86 m² | £355,000 (2016) |
| 69, Boundary Lane, Welwyn Garden City | Freehold | 133 m² | £325,000 (2014) |
| 75, Boundary Lane, Welwyn Garden City | Freehold | 97 m² | £220,000 (2011) |
| 77 Boundary Lane, Welwyn Garden City | Freehold | 86 m² | £240,000 (2010) |
| 79, Boundary Lane, Welwyn Garden City | - | 87 m² | - |
| 81 Boundary Lane, Welwyn Garden City | - | 87 m² | - |
| 85 Boundary Lane, Welwyn Garden City | - | 91 m² | - |
| 89 Boundary Lane, Welwyn Garden City | Freehold | 87 m² | £230,000 (2013) |
| 91 Boundary Lane, Welwyn Garden City | Freehold | 82 m² | £330,650 (2017) |
| 93 Boundary Lane, Welwyn Garden City | - | 82 m² | - |
| 97 Boundary Lane, Welwyn Garden City | - | 87 m² | - |
| 99 Boundary Lane, Welwyn Garden City | - | 91 m² | - |
| 101 Boundary Lane, Welwyn Garden City | - | 87 m² | - |
| 103, Boundary Lane, Welwyn Garden City | Freehold | 86 m² | £410,000 (2021) |
| 105 Boundary Lane, Welwyn Garden City | Freehold | 105 m² | £310,000 (2015) |
| 107 Boundary Lane, Welwyn Garden City | Freehold | 125 m² | £500,000 (2026) |
| 109, Boundary Lane, Welwyn Garden City | Freehold | 133 m² | £56,750 (1995) |
| 111 Boundary Lane, Welwyn Garden City | Freehold | 84 m² | £340,000 (2017) |
| 113, Boundary Lane, Welwyn Garden City | Freehold | 81 m² | £310,000 (2017) |
| 115, Boundary Lane, Welwyn Garden City | - | 82 m² | - |
| 117 Boundary Lane, Welwyn Garden City | - | 82 m² | - |
| 119 Boundary Lane, Welwyn Garden City | - | 83 m² | - |