| 2 Penn Way, Welwyn Garden City | - | 46 m² | - |
| 4 Penn Way, Welwyn Garden City | - | 64 m² | - |
| 6 Penn Way, Welwyn Garden City | Leasehold | 47 m² | £257,000 (2020) |
| 8 Penn Way, Welwyn Garden City | Leasehold | 50 m² | £238,000 (2025) |
| 10, Penn Way, Welwyn Garden City | Leasehold | 65 m² | £290,000 (2019) |
| 12, Penn Way, Welwyn Garden City | - | 48 m² | - |
| 14, Penn Way, Welwyn Garden City | Leasehold | 48 m² | £205,000 (2022) |
| 16 Penn Way, Welwyn Garden City | - | 64 m² | - |
| 18 Penn Way, Welwyn Garden City | Leasehold | 46 m² | £228,000 (2018) |
| 20, Penn Way, Welwyn Garden City | Leasehold | 46 m² | £200,000 (2019) |
| 22 Penn Way, Welwyn Garden City | Leasehold | 47 m² | £230,000 (2022) |
| 24, Penn Way, Welwyn Garden City | Leasehold | 65 m² | £142,500 (2020) |
| 26 Penn Way, Welwyn Garden City | - | 46 m² | - |
| 28 Penn Way, Welwyn Garden City | - | 45 m² | - |
| 30, Penn Way, Welwyn Garden City | - | 49 m² | - |
| 32 Penn Way, Welwyn Garden City | Leasehold | 64 m² | £327,000 (2022) |
| 34 Penn Way, Welwyn Garden City | - | 46 m² | - |
| 36, Penn Way, Welwyn Garden City | - | 63 m² | - |
| 38 Penn Way, Welwyn Garden City | Leasehold | 36 m² | £90,000 (2025) |
| 40, Penn Way, Welwyn Garden City | Leasehold | 49 m² | £117,500 (2021) |
| 42, Penn Way, Welwyn Garden City | Leasehold | 65 m² | £160,000 (2018) |
| 44, Penn Way, Welwyn Garden City | - | 47 m² | - |
| 46, Penn Way, Welwyn Garden City | - | 63 m² | - |
| 48, Penn Way, Welwyn Garden City | Leasehold | 46 m² | £161,000 (2019) |
| 50, Penn Way, Welwyn Garden City | - | 49 m² | - |
| 52 Penn Way, Welwyn Garden City | Leasehold | 65 m² | £145,000 (2020) |
| 54, Penn Way, Welwyn Garden City | - | 47 m² | - |
| 56, Penn Way, Welwyn Garden City | Freehold | 113 m² | £352,000 (2014) |
| 58 Penn Way, Welwyn Garden City | Freehold | 117 m² | £284,950 (2012) |
| 60 Penn Way, Welwyn Garden City | Freehold | 114 m² | £465,000 (2024) |
| 62 Penn Way, Welwyn Garden City | - | 117 m² | - |
| 64, Penn Way, Welwyn Garden City | Freehold | 113 m² | £410,000 (2018) |
| 66 Penn Way, Welwyn Garden City | - | 117 m² | - |
| 68 Penn Way, Welwyn Garden City | Freehold | 111 m² | £284,950 (2012) |
| 70 Penn Way, Welwyn Garden City | Freehold | 117 m² | £287,500 (2013) |
| 72, Penn Way, Welwyn Garden City | Freehold | 113 m² | £480,000 (2022) |
| 74, Penn Way, Welwyn Garden City | Freehold | 113 m² | £289,950 (2012) |
| 76, Penn Way, Welwyn Garden City | Freehold | 113 m² | £299,950 (2013) |
| 78, Penn Way, Welwyn Garden City | Freehold | 113 m² | £405,000 (2018) |
| 80 Penn Way, Welwyn Garden City | Freehold | 116 m² | £425,000 (2021) |
| 82 Penn Way, Welwyn Garden City | Freehold | 110 m² | £471,000 (2023) |
| 84 Penn Way, Welwyn Garden City | Freehold | 113 m² | £458,000 (2025) |
| 86, Penn Way, Welwyn Garden City | Freehold | 113 m² | £415,000 (2017) |
| 88 Penn Way, Welwyn Garden City | Freehold | 111 m² | £299,950 (2013) |
| 90 Penn Way, Welwyn Garden City | Leasehold | 67 m² | £189,950 (2013) |
| 92, Penn Way, Welwyn Garden City | Freehold | 113 m² | £299,950 (2013) |
| 94 Penn Way, Welwyn Garden City | Freehold | 117 m² | £470,000 (2025) |
| 96 Penn Way, Welwyn Garden City | - | 117 m² | - |
| 98 Penn Way, Welwyn Garden City | Freehold | 110 m² | £485,000 (2025) |
| 100 Penn Way, Welwyn Garden City | Freehold | 91 m² | £415,000 (2016) |
| 102 Penn Way, Welwyn Garden City | Freehold | 91 m² | £299,950 (2013) |