| 17, Park Hill, Harpenden AL5 3AT | Terracedd | 2 | £725,600 | 2026-03-23 |
| 59, Homedell House, Roundwood Lane, Harpenden AL5 3RA | Flat | 1 | £130,000 | 2026-02-18 |
| 155, Luton Road, Harpenden AL5 3BN | Terracedd | 2 | £465,000 | 2026-01-30 |
| 26a, Roundwood Lane, Harpenden AL5 3BZ | Detached | 5 | £1,530,000 | 2026-01-29 |
| 20, Homedell House, Roundwood Lane, Harpenden AL5 3RA | Flat | - | £147,500 | 2026-01-28 |
| 22, Kinsbourne Close, Harpenden AL5 3PB | Semi_Detached | 4 | £915,000 | 2026-01-09 |
| 13, Park Rise, Harpenden AL5 3AH | Semi_Detached | 3 | £835,000 | 2025-12-12 |
| 35, Park Mount, Harpenden AL5 3AS | Terracedd | - | £717,230 | 2025-12-05 |
| 341, Luton Road, Harpenden AL5 3LZ | Semi_Detached | 3 | £752,370 | 2025-11-28 |
| 15, Molescroft, Harpenden AL5 3LS | Semi_Detached | - | £960,000 | 2025-11-25 |
| 20, Wood End Road, Harpenden AL5 3ED | Detached | - | £2,675,000 | 2025-11-24 |
| 54, Carpenders Close, Harpenden AL5 3HN | Detached | 4 | £995,000 | 2025-09-04 |
| 4, Park Mount, Harpenden AL5 3AR | Detached | 4 | £1,160,000 | 2025-09-03 |
| Larry Cormick, Spring Road, Kinsbourne Green, Harpenden AL5 3PP | Detached | 4 | £1,875,000 | 2025-08-29 |
| 19, Park Mount, Harpenden AL5 3AS | Semi_Detached | 3 | £685,000 | 2025-08-26 |