| 1 Seymour Street, Aberdare | Freehold | 100 m² | £70,000 (2013) |
| 2, Seymour Street, Aberdare | Freehold | 94 m² | £14,500 (1999) |
| 4 Seymour Street, Aberdare | Freehold | 80 m² | £129,995 (2022) |
| 5 Seymour Street, Aberdare | - | 73 m² | - |
| 6 Seymour Street, Aberdare | Freehold | 77 m² | £69,000 (2020) |
| 7, Seymour Street, Aberdare | - | 84 m² | - |
| 9, Seymour Street, Aberdare | Freehold | 75 m² | £107,500 (2025) |
| 11, Seymour Street, Aberdare | Freehold | 83 m² | £47,000 (2020) |
| 12, Seymour Street, Aberdare | - | 74 m² | - |
| 13, Seymour Street, Aberdare | - | 95 m² | - |
| 15 Seymour Street, Aberdare | - | 92 m² | - |
| 16, Seymour Street, Aberdare | Freehold | 94 m² | £82,950 (2005) |
| 17, Seymour Street, Aberdare | - | 45 m² | - |
| 18, Seymour Street, Aberdare | Freehold | 138 m² | £84,000 (2017) |
| 18A, Seymour Street, Aberdare | - | 87 m² | - |
| 19, Seymour Street, Aberdare | Leasehold | 95 m² | £90,000 (2022) |
| 20, Seymour Street, Aberdare | Freehold | 78 m² | £55,000 (2020) |
| 21, Seymour Street, Aberdare | Freehold | 82 m² | £107,500 (2021) |
| 23 Seymour Street, Aberdare | Freehold | 80 m² | £86,995 (2026) |
| 24 Seymour Street, Aberdare | - | 79 m² | - |
| 26 Seymour Street, Aberdare | Freehold | 104 m² | £55,000 (2009) |
| 27 Seymour Street, Aberdare | Freehold | 82 m² | £97,000 (2025) |
| 29, Seymour Street, Aberdare | Freehold | 85 m² | £145,000 (2025) |
| 32 Seymour Street, Aberdare | - | 76 m² | - |
| 34, Seymour Street, Aberdare | Freehold | 80 m² | £60,000 (2017) |
| 35 Seymour Street, Aberdare | Freehold | 119 m² | £170,000 (2025) |
| 36 Seymour Street, Aberdare | Freehold | 85 m² | £140,000 (2024) |
| 38, Seymour Street, Aberdare | Freehold | 71 m² | £51,000 (2009) |
| 39, Seymour Street, Aberdare | Freehold | 107 m² | £64,000 (2020) |
| 41 Seymour Street, Aberdare | Freehold | 66 m² | £71,000 (2021) |
| 44, Seymour Street, Aberdare | - | 145 m² | - |
| 47, Seymour Street, Aberdare | Freehold | 91 m² | £85,000 (2018) |
| 48, Seymour Street, Aberdare | Freehold | 77 m² | £74,000 (2018) |
| 49, Seymour Street, Aberdare | Freehold | 74 m² | £45,000 (2018) |
| 50, Seymour Street, Aberdare | Freehold | 65 m² | £66,000 (2014) |
| 52 Seymour Street, Aberdare | - | 50 m² | - |
| 53 Seymour Street, Aberdare, Aberdare | Freehold | 82 m² | £79,950 (2011) |
| 54 Seymour Street, Aberdare | Freehold | 87 m² | £147,995 (2023) |
| 56 Seymour Street, Aberdare | Freehold | 67 m² | £78,000 (2021) |
| 58 Seymour Street, Aberdare | Freehold | 65 m² | £44,500 (2015) |