| 35a, Piggottshill Lane, Harpenden AL5 1LR | Semi_Detached | - | £770,000 | 2025-09-19 |
| Flat 3, 1 Welcombe House, Gibbs Close, Harpenden AL5 1FA | Semi_Detached | - | £950,000 | 2025-09-18 |
| 14, Gordons Walk, Harpenden AL5 1LQ | Semi_Detached | 3 | £652,500 | 2025-09-17 |
| 28, Sibley Avenue, Harpenden AL5 1HF | Semi_Detached | - | £793,650 | 2025-09-05 |
| 39, Cravells Road, Harpenden AL5 1BA | Terracedd | 3 | £655,000 | 2025-09-04 |
| 15, Ravenscroft, Harpenden AL5 1ST | Terracedd | 3 | £565,000 | 2025-09-02 |
| 37, Welbeck Rise, Harpenden AL5 1RT | Detached | 3 | £662,000 | 2025-08-22 |
| 144, Cravells Road, Harpenden AL5 1BQ | Terracedd | 4 | £955,000 | 2025-08-20 |
| 29, Bewdley Close, Harpenden AL5 1QX | Detached | 4 | £740,000 | 2025-08-12 |
| Flat 7, 91 Stonehurst Court, Southdown Road, Harpenden AL5 1PS | Flat | 2 | £445,000 | 2025-08-04 |
| 12, Poynings Close, Harpenden AL5 1JD | Detached | 4 | £1,260,000 | 2025-07-18 |
| 1, Emily Court, Harpenden AL5 1EA | Terracedd | 4 | £975,000 | 2025-06-25 |
| 3, Pendennis Court, Harpenden AL5 1SG | Semi_Detached | 3 | £665,000 | 2025-06-24 |
| 40, Bewdley Close, Harpenden AL5 1QX | Detached | 4 | £700,000 | 2025-06-20 |
| 10, Westminster Court, Grove Road, Harpenden AL5 1TH | Flat | 1 | £295,000 | 2025-06-13 |