| 2 Seymour Street, Mountain Ash | Freehold | 72 m² | £71,000 (2013) |
| 3 Seymour Street, Mountain Ash | Freehold | 63 m² | £58,000 (2022) |
| 4, Seymour Street, Mountain Ash | Freehold | 64 m² | £59,000 (2019) |
| 7, Seymour Street, Mountain Ash | Freehold | 110 m² | £135,000 (2019) |
| 8, Seymour Street, Mountain Ash | Freehold | 66 m² | £69,500 (2016) |
| 9 Seymour Street, Mountain Ash | Freehold | 111 m² | £171,500 (2023) |
| 11 Seymour Street, Mountain Ash | Freehold | 96 m² | £115,000 (2024) |
| 13 Seymour Street, Mountain Ash | - | 51 m² | - |
| 14, Seymour Street, Mountain Ash | Freehold | 63 m² | £68,500 (2020) |
| 20 Seymour Street, Mountain Ash | Freehold | 93 m² | £58,950 (2003) |
| 23 Seymour Street, Mountain Ash | Freehold | 85 m² | £84,000 (2012) |
| 25 Seymour Street, Mid Glamorgan | - | 50 m² | - |
| 27, Seymour Street, Mountain Ash | Freehold | 62 m² | £83,000 (2021) |
| 28 Seymour Street, Mountain Ash | Freehold | 84 m² | £85,000 (2014) |
| 29 Seymour Street, Mountain Ash | Freehold | 82 m² | £75,000 (2021) |
| 30 Seymour Street, Mountain Ash | Freehold | 80 m² | £52,950 (2003) |
| 32 Seymour Street, Mountain Ash | Freehold | 72 m² | £40,000 (2003) |
| 33 Seymour Street, Mountain Ash | - | 56 m² | - |
| 34 Seymour Street, Mountain Ash, Mountain Ash | Freehold | 62 m² | £63,250 (2021) |
| 35 Seymour Street, Mountain Ash | Freehold | 56 m² | £93,500 (2020) |
| 36 Seymour Street, Mountain Ash | Freehold | 57 m² | £64,000 (2011) |
| 37 Seymour Street, Mountain Ash | Freehold | 83 m² | £85,000 (2021) |
| 38, Seymour Street, Mountain Ash | Freehold | 90 m² | £67,500 (2017) |
| 39, Seymour Street, Mountain Ash | Freehold | 90 m² | £94,000 (2020) |
| 41 Seymour Street, Mountain Ash | Freehold | 76 m² | £140,000 (2022) |
| 42, Seymour Street, Mountain Ash | Freehold | 69 m² | £58,000 (2012) |
| 43, Seymour Street, Mountain Ash | Freehold | 71 m² | £65,000 (2015) |
