| 3, Mary Street, Treharris | - | 78 m² | - |
| 4, Mary Street, Treharris | Freehold | 86 m² | £60,000 (2014) |
| 5, Mary Street, Treharris | Freehold | 77 m² | £67,000 (2019) |
| 6, Mary Street, Treharris | - | 82 m² | - |
| 8 Mary Street, Treharris | Freehold | 76 m² | £89,000 (2022) |
| 9, Mary Street, Treharris | Freehold | 102 m² | £90,000 (2016) |
| 11 Mary Street, Treharris | Freehold | 80 m² | £54,500 (2025) |
| 13, Mary Street, Treharris | Freehold | 90 m² | £120,000 (2021) |
| 15, Mary Street, Treharris | Freehold | 93 m² | £85,000 (2018) |
| 17 Mary Street, Treharris | Freehold | 99 m² | £95,000 (2021) |
| 18, Mary Street, Treharris | Freehold | 101 m² | £110,000 (2021) |
| 19 Mary Street, Treharris | Freehold | 99 m² | £98,000 (2021) |
| 20 Mary Street, Treharris | - | 80 m² | - |
| 21, Mary Street, Treharris | Freehold | 97 m² | £150,000 (2022) |
| 22 Mary Street, Treharris | Freehold | 79 m² | £75,000 (2019) |
| 23 Mary Street, Treharris, Treharris | Freehold | 84 m² | £30,000 (2021) |
| 24 Mary Street, Treharris | - | 114 m² | - |
| 26 Mary Street, Treharris, Treharris | Freehold | 139 m² | £87,000 (2021) |
| 28 Mary Street, Treharris | Freehold | 85 m² | £137,000 (2023) |
| 29, Mary Street, Treharris | Freehold | 85 m² | £41,000 (2014) |
| 30, Mary Street, Treharris | - | 77 m² | - |
| 32, Mary Street, Treharris | Freehold | 84 m² | £112,000 (2023) |
| 33, Mary Street, Treharris | - | 76 m² | - |
| 34 Mary Street, Treharris | Freehold | 111 m² | £60,000 (2019) |
| 35 Mary Street, Treharris | - | 68 m² | - |
| 37 Mary Street, Treharris | Leasehold | 45 m² | £79,000 (2025) |
| 38, Mary Street, Treharris | - | 73 m² | - |
| 39, Mary Street, Treharris | - | 77 m² | - |
| 40, Mary Street, Treharris | Leasehold | 68 m² | £20,000 (2000) |
| 41 Mary Street, Treharris | Freehold | 69 m² | £75,950 (2019) |
| 42, Mary Street, Treharris | Freehold | 98 m² | £35,000 (2013) |
| 43 Mary Street, Treharris | Freehold | 88 m² | £84,000 (2007) |
| Brynawel, Mary Street, Treharris | Freehold | 183 m² | £340,000 (2023) |