| 1 Knights Court, 26, Helder Street, South Croydon | - | 57 m² | - |
| 1, Helder Street, South Croydon | Freehold | 81 m² | £380,000 (2019) |
| 2 Helder Street, South Croydon | Freehold | 82 m² | £425,000 (2026) |
| 2 Knights Court, 26, Helder Street, South Croydon | - | 39 m² | - |
| 3 Helder Street, South Croydon | Freehold | 72 m² | £380,000 (2023) |
| 3 Knights Court, 26 Helder Street, South Croydon | Leasehold | 54 m² | £215,000 (2016) |
| 4 Knights Court, 26, Helder Street, South Croydon | - | 59 m² | - |
| 4, Helder Street, South Croydon | - | 68 m² | - |
| 5, Helder Street, South Croydon | - | 70 m² | - |
| 6, Helder Street, South Croydon | Freehold | 66 m² | £195,000 (2004) |
| 8 Knights Court, 26, Helder Street, South Croydon | - | 47 m² | - |
| 9 Knights Court, 26 Helder Street, South Croydon | - | 47 m² | - |
| 10, Helder Street, South Croydon | - | 70 m² | - |
| 11 Knights Court, 26, Helder Street, South Croydon | - | 49 m² | - |
| 11, Helder Street, South Croydon | - | 69 m² | - |
| 12, Helder Street, South Croydon | - | 70 m² | - |
| 13, Helder Street, South Croydon | - | 69 m² | - |
| 14, Helder Street, South Croydon | Freehold | 68 m² | £385,000 (2022) |
| 16, Helder Street, South Croydon | - | 68 m² | - |
| 17, Helder Street, South Croydon | - | 69 m² | - |
| 18, Helder Street, South Croydon | - | 69 m² | - |
| 19 Helder Street, South Croydon, South Croydon | Freehold | 70 m² | £385,000 (2026) |
| 20 Helder Street, South Croydon | Freehold | 68 m² | £395,000 (2024) |
| 21, Helder Street, South Croydon | - | 70 m² | - |
| 22 Helder Street, South Croydon | - | 69 m² | - |
| 23 Helder Street, South Croydon | Freehold | 72 m² | £395,000 (2025) |
| 24, Helder Street, South Croydon | - | 68 m² | - |
| 27 Helder Street, South Croydon | Freehold | 66 m² | £390,000 (2026) |
| 28, Helder Street, South Croydon | Freehold | 147 m² | £375,000 (2023) |
| 29, Helder Street, South Croydon | Freehold | 64 m² | £225,000 (2007) |
| 30 Helder Street, South Croydon | Freehold | 65 m² | £385,000 (2022) |
| 31 Helder Street, South Croydon | Freehold | 64 m² | £385,000 (2024) |
| 32 Helder Street, South Croydon | Freehold | 813 m² | £175,000 (2004) |
| 33, Helder Street, South Croydon | Freehold | 97 m² | £285,000 (2014) |
| 34 Helder Street, South Croydon | Freehold | 67 m² | £380,000 (2025) |
| 36 Helder Street, South Croydon | - | 65 m² | - |
| 37 Helder Street, South Croydon | Freehold | 60 m² | £400,000 (2023) |
| 40 Helder Street, South Croydon | Freehold | 65 m² | £430,000 (2022) |
| 41 Helder Street, South Croydon | Freehold | 71 m² | £427,000 (2025) |