| 4, Helvellyn Avenue, Washington | Leasehold | 68 m² | £149,950 (2019) |
| 6, Helvellyn Avenue, Washington | - | 158 m² | - |
| 10, Helvellyn Avenue, Washington | Leasehold | 47 m² | £40,000 (2011) |
| 12, Helvellyn Avenue, Washington | Freehold | 44 m² | £116,000 (2014) |
| 18, Helvellyn Avenue, Washington | Freehold | 81 m² | £147,000 (2019) |
| 22, Helvellyn Avenue, Washington | - | 91 m² | - |
| 26, Helvellyn Avenue, Washington | Freehold | 82 m² | £174,000 (2020) |
| 30, Helvellyn Avenue, Washington | - | 75 m² | - |
| 32 Helvellyn Avenue, Washington | Freehold | 84 m² | £165,000 (2023) |
| 34, Helvellyn Avenue, Washington | - | 81 m² | - |
| 40, Helvellyn Avenue, Washington | Freehold | 47 m² | £124,950 (2012) |
| 44, Helvellyn Avenue, Washington | Freehold | 80 m² | £206,500 (2025) |
| 46, Helvellyn Avenue, Washington | Leasehold | 81 m² | £68,950 (1999) |
| 48 Helvellyn Avenue, Washington | - | 83 m² | - |
| 50, Helvellyn Avenue, Washington | Leasehold | 80 m² | £190,000 (2025) |
| 52, Helvellyn Avenue, Washington | Freehold | 105 m² | £148,000 (2006) |
| 60, Helvellyn Avenue, Washington | Freehold | 59 m² | £80,000 (2014) |
| 62, Helvellyn Avenue, Washington | Freehold | 61 m² | £110,000 (2026) |
| 64, Helvellyn Avenue, Washington | - | 63 m² | - |
| 66, Helvellyn Avenue, Washington | Freehold | 65 m² | £130,000 (2018) |
| 68, Helvellyn Avenue, Washington | Freehold | 63 m² | £81,950 (2002) |
| 74, Helvellyn Avenue, Washington | Freehold | 67 m² | £118,500 (2016) |
| 76, Helvellyn Avenue, Washington | Freehold | 62 m² | £116,545 (2017) |
| 80, Helvellyn Avenue, Washington | Freehold | 65 m² | £115,000 (2018) |
| 82, Helvellyn Avenue, Washington | Freehold | 76 m² | £170,000 (2017) |
