| 8, 48 Berkeley Court, Luton Road, Harpenden AL5 2UN | Flat | - | £345,500 | 2026-03-11 |
| 1a The Bungalow, Wheatfield Road, Harpenden AL5 2NY | Detached | 3 | £1,425,000 | 2026-03-05 |
| 5, Amenbury Court, Avenue St Nicholas, Harpenden AL5 2BU | Flat | 3 | £727,500 | 2026-02-24 |
| 44, Park Avenue North, Harpenden AL5 2ED | Detached | 4 | £3,200,000 | 2026-02-13 |
| 40, Park Avenue North, Harpenden AL5 2ED | Detached | 5 | £3,050,000 | 2026-01-30 |
| Mystole, Hatching Green, Harpenden AL5 2JP | Terracedd | 3 | £718,000 | 2026-01-23 |
| 7, Moreton Place, Harpenden AL5 2UF | Detached | - | £1,925,000 | 2026-01-13 |
| 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 |