| Flat 1 Westminster House, Hallam Close, Watford | Leasehold | 52 m² | £124,000 (2001) |
| Flat 3, Westminster House, Hallam Close, Watford | Leasehold | 52 m² | £62,500 (1996) |
| Flat 4 Westminster House, Hallam Close, Watford | Leasehold | 53 m² | £195,000 (2010) |
| Flat 5 Westminster House, Hallam Close, Watford | Leasehold | 53 m² | £184,000 (2006) |
| Flat 6 Westminster House, Hallam Close, Watford | Leasehold | 53 m² | £77,500 (1998) |
| Flat 7, Westminster House, Hallam Close, Watford | Leasehold | 52 m² | £184,000 (2006) |
| Flat 8, Westminster House, Hallam Close, Watford | Leasehold | 52 m² | £85,000 (1999) |
| Flat 9 Westminster House, Hallam Close, Watford | Leasehold | 52 m² | £135,000 (2002) |
| Flat 10 Westminster House, Hallam Close, Watford | Leasehold | 55 m² | £65,000 (1995) |
| Flat 11 Westminster House, Hallam Close, Watford | Leasehold | 52 m² | £318,000 (2017) |
| Flat 12 Westminster House, Hallam Close, Watford | Leasehold | 51 m² | £222,000 (2024) |
| Flat 13, Westminster House, Hallam Close, Watford | Leasehold | 56 m² | £285,000 (2026) |
| Flat 14, Westminster House, Hallam Close, Watford | Leasehold | 52 m² | £180,000 (2012) |
| Flat 15, Westminster House, Hallam Close, Watford | Leasehold | 53 m² | £77,000 (1998) |
| Flat 16, Westminster House, Hallam Close, Watford | Leasehold | 55 m² | £157,950 (2002) |
| Flat 17 Westminster House, Hallam Close, Watford | Leasehold | 52 m² | £240,000 (2020) |
| Flat 18, Westminster House, Hallam Close, Watford | Leasehold | 53 m² | £117,000 (2000) |
| Flat 19, Westminster House, Hallam Close, Watford | Leasehold | 46 m² | £235,000 (2024) |
| Flat 20 Westminster House, Hallam Close, Watford | Leasehold | 46 m² | £155,000 (2013) |
| Flat 21, Westminster House, Hallam Close, Watford | Leasehold | 46 m² | £265,000 (2016) |
| Flat 22, Westminster House, Hallam Close, Watford | Leasehold | 55 m² | £215,000 (2024) |
| Flat 23 Westminster House, Hallam Close, Watford | Leasehold | 45 m² | £155,000 (2012) |
| Flat 24 Westminster House, Hallam Close, Watford | Leasehold | 61 m² | £257,500 (2020) |
