| 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 |
| 8, Wood End Hill, Harpenden AL5 3EZ | Detached | 4 | £2,200,000 | 2025-08-20 |
| 25, Homedell House, Roundwood Lane, Harpenden AL5 3RA | Flat | 1 | £135,000 | 2025-08-13 |
| 355, Luton Road, Harpenden AL5 3LZ | Semi_Detached | 3 | £775,000 | 2025-07-29 |
| 25, Greatfield Close, Harpenden AL5 3HP | Terracedd | 3 | £635,000 | 2025-07-18 |
| 305, Luton Road, Harpenden AL5 3LW | Detached | 4 | £1,575,000 | 2025-07-14 |
| 117, Luton Road, Harpenden AL5 3BB | Terracedd | 3 | £460,000 | 2025-06-20 |
| 14, Kinsbourne Close, Harpenden AL5 3PB | Terracedd | 4 | £925,000 | 2025-06-06 |
| 66, Derwent Road, Harpenden AL5 3NX | Detached | 5 | £1,400,000 | 2025-05-20 |
| 31, Ridgewood Drive, Harpenden AL5 3LJ | Detached | 5 | £1,450,000 | 2025-05-12 |
| 243, Luton Road, Harpenden AL5 3DE | Semi_Detached | 4 | £974,000 | 2025-04-25 |
| Salcombe House, Spring Road, Kinsbourne Green, Harpenden AL5 3PP | Detached | 5 | £1,600,000 | 2025-04-23 |