| 427 Howlands, Welwyn Garden City | - | 73 m² | - |
| 429, Howlands, Welwyn Garden City | Freehold | 73 m² | £284,000 (2017) |
| 431 Howlands, Welwyn Garden City | - | 77 m² | - |
| 433 Howlands, Welwyn Garden City | - | 62 m² | - |
| 437 Howlands, Welwyn Garden City | - | 72 m² | - |
| 439, Howlands, Welwyn Garden City | Freehold | 69 m² | £319,000 (2016) |
| 441, Howlands, Welwyn Garden City | Freehold | 72 m² | £219,950 (2009) |
| 443 Howlands, Welwyn Garden City | - | 76 m² | - |
| 445 Howlands, Welwyn Garden City | - | 70 m² | - |
| 447 Howlands, Welwyn Garden City, Welwyn Garden City | Freehold | 79 m² | £177,000 (2011) |
| 449 Howlands, Welwyn Garden City | - | 71 m² | - |
| 451 Howlands, Welwyn Garden City | Freehold | 71 m² | £235,000 (2014) |
| 453, Howlands, Welwyn Garden City | Freehold | 72 m² | £415,000 (2021) |
| 455 Howlands, Welwyn Garden City | Freehold | 74 m² | £360,000 (2025) |
| 457 Howlands, Welwyn Garden City | Freehold | 69 m² | £400,000 (2025) |
| 459 Howlands, Welwyn Garden City | Freehold | 71 m² | £395,000 (2024) |
| 461 Howlands, Welwyn Garden City | Freehold | 68 m² | £385,000 (2025) |
| 463, Howlands, Welwyn Garden City | Freehold | 91 m² | £232,000 (2007) |
| 465, Howlands, Welwyn Garden City | Freehold | 90 m² | £358,000 (2018) |
| 467, Howlands, Welwyn Garden City | - | 86 m² | - |
| 471, Howlands, Welwyn Garden City | - | 71 m² | - |
| 473, Howlands, Welwyn Garden City | Freehold | 74 m² | £322,500 (2016) |
| 475 Howlands, Welwyn Garden City | - | 76 m² | - |
| 479, Howlands, Welwyn Garden City | - | 71 m² | - |
| 481 Howlands, Welwyn Garden City | Freehold | 73 m² | £400,000 (2025) |
| 483 Howlands, Welwyn Garden City | - | 96 m² | - |
