| Flat 23, 23a, Leyton Road, Harpenden AL5 2FH | Flat | 1 | £417,000 | 2025-12-05 |
| 26, Church Green Row, Church Green, Harpenden AL5 2TW | Flat | 2 | £465,000 | 2025-12-01 |
| 19, Geescroft Walk, Harpenden AL5 2GX | Flat | 2 | £520,000 | 2025-11-25 |
| 5, Townsend Lane, Harpenden AL5 2PY | Semi_Detached | 2 | £1,175,000 | 2025-09-22 |
| 27, Barns Dene, Harpenden AL5 2HH | Detached | 4 | £1,175,000 | 2025-09-12 |
| 7, The Deerings, Harpenden AL5 2PF | Detached | 3 | £500,000 | 2025-09-08 |
| 3, Sir Josephs Walk, Harpenden AL5 2DT | Terracedd | - | £935,000 | 2025-09-03 |
| 19, Hawsley Road, Harpenden AL5 2BL | Detached | 4 | £1,680,000 | 2025-08-28 |
| 10, Dellcroft Way, Harpenden AL5 2NG | Detached | - | £1,700,000 | 2025-08-22 |
| 25, West Common, Harpenden AL5 2JN | Terracedd | 2 | £512,500 | 2025-08-19 |
| 56, Park Avenue North, Harpenden AL5 2ED | Detached | - | £4,700,000 | 2025-08-15 |
| 1, 48 Berkeley Court, Luton Road, Harpenden AL5 2UN | Flat | 2 | £351,100 | 2025-07-25 |
| 4, Maple Road, Harpenden AL5 2DS | Semi_Detached | - | £2,300,000 | 2025-07-23 |
| 16, Geescroft Walk, Harpenden AL5 2GX | Flat | - | £525,000 | 2025-07-18 |
| 5, Amenbury Lane, Harpenden AL5 2BT | Terracedd | 2 | £461,500 | 2025-07-11 |