| Flat 1 Sloane Apartments, 54, Old Castle Street, London | - | 47 m² | - |
| Flat 2 Sloane Apartments, 54, Old Castle Street, London | - | 39 m² | - |
| Flat 3 Sloane Apartments, 54, Old Castle Street, London | - | 92 m² | - |
| Flat 4, Sloane Apartments, 54 Old Castle Street, London | Leasehold | 49 m² | £532,500 (2021) |
| Flat 5 Sloane Apartments, 54, Old Castle Street, London | - | 69 m² | - |
| Flat 6 Sloane Apartments, 54, Old Castle Street, London | - | 69 m² | - |
| Flat 7, Sloane Apartments, 54 Old Castle Street, London | Leasehold | 35 m² | £360,000 (2014) |
| Flat 8 Sloane Apartments, 54, Old Castle Street, London | Leasehold | 89 m² | £665,000 (2014) |
| Flat 9 Sloane Apartments, 54, Old Castle Street, London | Leasehold | 90 m² | £895,000 (2021) |
| Flat 10 Sloane Apartments, 54, Old Castle Street, London | - | 50 m² | - |
| Flat 11, Sloane Apartments, 54 Old Castle Street, London | Leasehold | 68 m² | £700,000 (2019) |
| Flat 12 Sloane Apartments, 54, Old Castle Street, London | - | 68 m² | - |
| Flat 13, Sloane Apartments, 54 Old Castle Street, London | Leasehold | 36 m² | £317,000 (2014) |
| Flat 14, Sloane Apartments, 54 Old Castle Street, London | Leasehold | 89 m² | £717,500 (2014) |
| Flat 15, Sloane Apartments, 54 Old Castle Street, London | Leasehold | 88 m² | £717,500 (2014) |
| Flat 16 Sloane Apartments, 54, Old Castle Street, London | Leasehold | 50 m² | £555,000 (2018) |
| Flat 17, Sloane Apartments, 54 Old Castle Street, London | - | 70 m² | - |
| Flat 18 Sloane Apartments, 54, Old Castle Street, London | - | 68 m² | - |
| Flat 19, Sloane Apartments, 54 Old Castle Street, London | Leasehold | 35 m² | £422,500 (2014) |
| Flat 20 Sloane Apartments, 54, Old Castle Street, London | Leasehold | 89 m² | £873,000 (2019) |
| Flat 21, Sloane Apartments, 54 Old Castle Street, London | Leasehold | 91 m² | £860,000 (2026) |
