| 1A Arden Grove, Harpenden | - | 68 m² | - |
| 1B, Arden Grove, Harpenden | Leasehold | 69 m² | £280,500 (2022) |
| 1D Arden Grove, Harpenden | Leasehold | 70 m² | £210,000 (2014) |
| 9, Arden Grove, Harpenden | Freehold | 357 m² | £1,998,613 (2014) |
| 10, Arden Grove, Harpenden | - | 270 m² | - |
| 11, Arden Grove, Harpenden | Freehold | 146 m² | £652,000 (2009) |
| 12 Arden Grove, Harpenden | Freehold | 108 m² | £1,050,000 (2022) |
| 13 Arden Grove, Harpenden | - | 277 m² | - |
| 14, Arden Grove, Harpenden | Freehold | 168 m² | £1,290,000 (2019) |
| 15 Arden Grove, Harpenden | Freehold | 233 m² | £1,675,000 (2023) |
| 16 Arden Grove, Harpenden | Freehold | 108 m² | £1,460,000 (2025) |
| 17, Arden Grove, Harpenden | Freehold | 149 m² | £745,000 (2009) |
| Flat 1 Arden Court, Arden Grove, Harpenden | Leasehold | 90 m² | £715,000 (2017) |
| Flat 1 Old Post House, 20, Arden Grove, Harpenden | Leasehold | 102 m² | £625,000 (2015) |
| Flat 2 Arden Court, Arden Grove, Harpenden | Leasehold | 77 m² | £495,000 (2018) |
| Flat 2 Old Post House, 20, Arden Grove, Harpenden | Leasehold | 139 m² | £775,000 (2015) |
| Flat 3 Arden Court, Arden Grove, Harpenden | Leasehold | 57 m² | £415,000 (2017) |
| Flat 3, Old Post House, 20 Arden Grove, Harpenden | Leasehold | 91 m² | £500,000 (2014) |
| Flat 4 Arden Court, Arden Grove, Harpenden | Leasehold | 76 m² | £565,000 (2017) |
| Flat 4, Old Post House, 20 Arden Grove, Harpenden | Leasehold | 111 m² | £650,000 (2018) |
| Flat 5 Arden Court, Arden Grove, Harpenden | Leasehold | 67 m² | £461,000 (2017) |
| Flat 5 Old Post House, 20, Arden Grove, Harpenden | Leasehold | 130 m² | £825,000 (2014) |
| Flat 6 Arden Court, Arden Grove, Harpenden | Leasehold | 45 m² | £320,000 (2017) |
| Flat 6, Old Post House, Harpenden | Leasehold | 90 m² | £550,000 (2014) |
| Flat 7 Arden Court, Arden Grove, Harpenden | Leasehold | 94 m² | £850,000 (2017) |
| Flat 7 Old Post House, 20, Arden Grove, Harpenden | Leasehold | 142 m² | £885,000 (2024) |
| Flat 8 Arden Court, Arden Grove, Harpenden | Freehold | 45 m² | £56,700 (2022) |
| Flat 9 Arden Court, Arden Grove, Harpenden | Leasehold | 45 m² | £350,985 (2017) |
| Flat 10 Arden Court, Arden Grove, Harpenden | Leasehold | 99 m² | £622,500 (2024) |
| Flat 11 Arden Court, Arden Grove, Harpenden | Leasehold | 101 m² | £695,000 (2018) |
