| 1 Royal Court, Queen Marys Avenue, Watford | - | 67 m² | - |
| 2 Royal Court, Queen Marys Avenue, Watford | - | 54 m² | - |
| 3 Royal Court, Queen Marys Avenue, Watford | - | 68 m² | - |
| 4 Royal Court, Queen Marys Avenue, Watford | - | 68 m² | - |
| 5 Royal Court, Queen Marys Avenue, Watford | - | 79 m² | - |
| 6 Royal Court, Queen Marys Avenue, Watford | Leasehold | 67 m² | £295,000 (2019) |
| 7 Royal Court, Queen Marys Avenue, Watford | - | 66 m² | - |
| 8 Royal Court, Queen Marys Avenue, Watford | Leasehold | 63 m² | £126,000 (2018) |
| 9 Royal Court, Queen Marys Avenue, Watford | - | 67 m² | - |
| 10 Royal Court, Queen Marys Avenue, Watford | Leasehold | 66 m² | £128,000 (2017) |
| 11 Royal Court, Queen Marys Avenue, Watford | Leasehold | 68 m² | £120,000 (2022) |
| 12 Royal Court, Queen Marys Avenue, Watford | - | 81 m² | - |
| 14 Royal Court, Queen Marys Avenue, Watford | Leasehold | 67 m² | £212,000 (2014) |
| 15 Royal Court, Queen Marys Avenue, Watford | Leasehold | 65 m² | £303,000 (2024) |
| 16 Royal Court, Queen Marys Avenue, Watford | Leasehold | 79 m² | £185,000 (2010) |
| 17 Royal Court, Queen Marys Avenue, Watford | Leasehold | 70 m² | £275,000 (2021) |
| 18 Royal Court, Queen Marys Avenue, Watford | Leasehold | 78 m² | £290,000 (2020) |
| 19 Royal Court, Queen Marys Avenue, Watford | Leasehold | 67 m² | £210,000 (2012) |
| 20 Royal Court, Queen Marys Avenue, Watford, Watford | Leasehold | 67 m² | £195,000 (2010) |
| 21 Royal Court, Queen Marys Avenue, Watford | Leasehold | 71 m² | £315,000 (2021) |
| 22 Royal Court, Queen Marys Avenue, Watford | Leasehold | 72 m² | £180,500 (2011) |
| 23 Royal Court, Queen Marys Avenue, Watford, Watford | - | 77 m² | - |
| 24 Royal Court, Queen Marys Avenue, Watford | Leasehold | 71 m² | £175,786 (2011) |
| 25 Royal Court, Queen Marys Avenue, Watford | Leasehold | 71 m² | £185,000 (2010) |
| 26 Royal Court, Queen Marys Avenue, Watford | Leasehold | 68 m² | £197,500 (2010) |
| 27 Royal Court, Queen Marys Avenue, Watford | Leasehold | 78 m² | £195,000 (2010) |
| 28 Royal Court, Queen Marys Avenue, Watford | Leasehold | 74 m² | £202,000 (2010) |
| 29 Royal Court, Queen Marys Avenue, Watford, Watford | Leasehold | 71 m² | £205,000 (2010) |
| 30 Royal Court, Queen Marys Avenue, Watford | Leasehold | 70 m² | £184,000 (2010) |
| 31 Royal Court, Queen Marys Avenue, Watford, Watford | Leasehold | 59 m² | £160,000 (2010) |
| 32 Royal Court, Queen Marys Avenue, Watford | Leasehold | 60 m² | £295,000 (2022) |
| 33 Royal Court, Queen Marys Avenue, Watford | Leasehold | 68 m² | £295,000 (2015) |
| 34 Royal Court, Queen Marys Avenue, Watford, Watford | Leasehold | 69 m² | £170,000 (2010) |
| 35 Royal Court, Queen Marys Avenue, Watford | Leasehold | 74 m² | £170,000 (2010) |
| 36 Royal Court, Queen Marys Avenue, Watford | - | 74 m² | - |
| 37 Royal Court, Queen Marys Avenue, Watford | Leasehold | 65 m² | £170,000 (2010) |
| 38 Royal Court, Queen Marys Avenue, Watford | Leasehold | 65 m² | £184,000 (2010) |
| 39 Royal Court, Queen Marys Avenue, Watford | - | 91 m² | - |
| 40 Royal Court, Queen Marys Avenue, Watford | Leasehold | 91 m² | £300,000 (2018) |
| 41 Royal Court, Queen Marys Avenue, Watford | - | 91 m² | - |
| 42 Royal Court, Queen Marys Avenue, Watford | Leasehold | 91 m² | £104,000 (2009) |
| 43 Royal Court, Queen Marys Avenue, Watford | - | 91 m² | - |
| 44 Royal Court, Queen Marys Avenue, Watford | - | 75 m² | - |
| 45 Royal Court, Queen Marys Avenue, Watford | - | 92 m² | - |
| 46 Royal Court, Queen Marys Avenue, Watford | - | 67 m² | - |
| 47 Royal Court, Queen Marys Avenue, Watford | - | 68 m² | - |
| 48 Royal Court, Queen Marys Avenue, Watford | - | 74 m² | - |
| 49 Royal Court, Queen Marys Avenue, Watford, Watford | - | 68 m² | - |
| 50 Royal Court, Queen Marys Avenue, Watford | - | 73 m² | - |
| 51 Royal Court, Queen Marys Avenue, Watford | - | 67 m² | - |
| 52 Royal Court, Queen Marys Avenue, Watford | - | 103 m² | - |
| 53 Royal Court, Queen Marys Avenue, Watford | - | 88 m² | - |