| 1 Arran House, Pioneer Way, Watford | Leasehold | 37 m² | £78,000 (2001) |
| 2 Arran House, Pioneer Way, Watford | Leasehold | 60 m² | £225,000 (2026) |
| 3 Arran House, Pioneer Way, Watford, Watford | Leasehold | 40 m² | £118,950 (2003) |
| 4 Arran House, Pioneer Way, Watford | Leasehold | 38 m² | £135,500 (2006) |
| 5 Arran House, Pioneer Way, Watford | Leasehold | 62 m² | £95,500 (2001) |
| 6 Arran House, Pioneer Way, Watford | Leasehold | 37 m² | £42,995 (1996) |
| 7 Arran House, Pioneer Way, Watford | Leasehold | 38 m² | £190,000 (2018) |
| 8 Arran House, Pioneer Way, Watford | Leasehold | 60 m² | £164,500 (2006) |
| 9 Arran House, Pioneer Way, Watford | Leasehold | 46 m² | £55,950 (1999) |
| 10 Arran House, Pioneer Way, Watford | Leasehold | 37 m² | £193,000 (2024) |
| 11 Arran House, Pioneer Way, Watford | Leasehold | 31 m² | £140,000 (2025) |
| 12 Arran House, Pioneer Way, Watford | Leasehold | 29 m² | £140,000 (2015) |
| 13 Arran House, Pioneer Way, Watford | Leasehold | 42 m² | £205,000 (2023) |
| 14 Arran House, Pioneer Way, Watford | Leasehold | 30 m² | £100,000 (2006) |
| 15 Arran House, Pioneer Way, Watford, Watford | Leasehold | 29 m² | £109,000 (2006) |
| 16 Arran House, Pioneer Way, Watford | Leasehold | 38 m² | £141,950 (2007) |
| 17 Arran House, Pioneer Way, Watford | Leasehold | 29 m² | £105,000 (2010) |
| 18 Arran House, Pioneer Way, Watford | Leasehold | 29 m² | £185,000 (2018) |
