| 520 Howlands, Welwyn Garden City | - | 82 m² | - |
| 522, Howlands, Welwyn Garden City | Freehold | 81 m² | £300,000 (2017) |
| 526, Howlands, Welwyn Garden City | Freehold | 107 m² | £350,000 (2017) |
| 528 Howlands, Welwyn Garden City | Freehold | 86 m² | £166,500 (2005) |
| 530 Howlands, Welwyn Garden City | - | 72 m² | - |
| 532 Howlands, Welwyn Garden City | - | 82 m² | - |
| 534, Howlands, Welwyn Garden City | Freehold | 72 m² | £283,000 (2015) |
| 536 Howlands, Welwyn Garden City, Welwyn Garden City | Freehold | 73 m² | £320,000 (2021) |
| 538, Howlands, Welwyn Garden City | - | 73 m² | - |
| 540 Howlands, Welwyn Garden City | Freehold | 87 m² | £470,500 (2025) |
| 542, Howlands, Welwyn Garden City | Freehold | 78 m² | £270,000 (2015) |
| 544 Howlands, Welwyn Garden City | Freehold | 85 m² | £400,000 (2022) |
| 548, Howlands, Welwyn Garden City | - | 73 m² | - |
| 550 Howlands, Welwyn Garden City | - | 74 m² | - |
| 552 Howlands, Welwyn Garden City | - | 73 m² | - |
| 554 Howlands, Welwyn Garden City | - | 73 m² | - |
| 558, Howlands, Welwyn Garden City | Freehold | 68 m² | £325,000 (2019) |
| 560, Howlands, Welwyn Garden City | Freehold | 87 m² | £205,000 (2014) |
| 562 Howlands, Welwyn Garden City | Freehold | 72 m² | £70,000 (1999) |
| 564 Howlands, Welwyn Garden City | - | 70 m² | - |
| 568, Howlands, Welwyn Garden City | Freehold | 127 m² | £475,000 (2020) |
| 574 Howlands, Welwyn Garden City | Freehold | 116 m² | £270,000 (2007) |
| 580, Howlands, Welwyn Garden City | - | 71 m² | - |
| 582 Howlands, Welwyn Garden City, Welwyn Garden City | Freehold | 68 m² | £375,000 (2025) |
| 584 Howlands, Welwyn Garden City | - | 70 m² | - |
| 588, Howlands, Welwyn Garden City | Freehold | 75 m² | £193,000 (2012) |
| 590, Howlands, Welwyn Garden City | Freehold | 74 m² | £410,000 (2025) |
| 592 Howlands, Welwyn Garden City | - | 70 m² | - |
| 594 Howlands, Welwyn Garden City | - | 78 m² | - |
| 596 Howlands, Welwyn Garden City | - | 70 m² | - |
| 598 Howlands, Welwyn Garden City | - | 70 m² | - |
| 600, Howlands, Welwyn Garden City | Freehold | 73 m² | £240,000 (2014) |
| 604 Howlands, Welwyn Garden City | Freehold | 71 m² | £435,000 (2023) |