| 2 Dennis Avenue, St. Helens | - | 69 m² | - |
| 3 Dennis Avenue, Thatto Heath, St. Helens | - | 71 m² | - |
| 4, Dennis Avenue, St. Helens | Freehold | 97 m² | £125,000 (2019) |
| 5, Dennis Avenue, St. Helens | - | 73 m² | - |
| 8 Dennis Avenue, Thatto Heath, St. Helens | - | 68 m² | - |
| 9, Dennis Avenue, St. Helens | Freehold | 84 m² | £205,000 (2024) |
| 10 Dennis Avenue, Thatto Heath, St. Helens | - | 74 m² | - |
| 11 Dennis Avenue, Thatto Heath, St. Helens | - | 71 m² | - |
| 12 Dennis Avenue, Thatto Heath, St. Helens | - | 68 m² | - |
| 13 Dennis Avenue, Thatto Heath, St. Helens | - | 73 m² | - |
| 14 Dennis Avenue, Thatto Heath, St. Helens | - | 71 m² | - |
| 15 Dennis Avenue, St. Helens | Freehold | 71 m² | £140,000 (2025) |
| 16, Dennis Avenue, St. Helens | Freehold | 69 m² | £75,000 (2014) |
| 17 Dennis Avenue, Thatto Heath, St. Helens | - | 71 m² | - |
| 18, Dennis Avenue, St. Helens | - | 71 m² | - |
| 19 Dennis Avenue, St. Helens | Freehold | 83 m² | £190,000 (2022) |
| 20, Dennis Avenue, St. Helens | Freehold | 69 m² | £110,000 (2022) |
| 21, Dennis Avenue, St. Helens | - | 69 m² | - |
| 22, Dennis Avenue, St. Helens | - | 72 m² | - |
| 23, Dennis Avenue, St. Helens | Freehold | 68 m² | £30,500 (2003) |
| 24 Dennis Avenue, St. Helens | - | 69 m² | - |
| 25A Dennis Avenue, Thatto Heath, St. Helens | - | 35 m² | - |
| 25B Dennis Avenue, St. Helens | - | 36 m² | - |
| 26 Dennis Avenue, Thatto Heath, St. Helens | - | 71 m² | - |
| 27, Dennis Avenue, St. Helens | - | 82 m² | - |
| 28 Dennis Avenue, Thatto Heath, St. Helens | - | 71 m² | - |
