| 1 Thomas Street, Mountain Ash | Leasehold | 123 m² | £18,000 (2023) |
| 3 Thomas Street, Mountain Ash, Mountain Ash | - | 111 m² | - |
| 4 Thomas Street, Mountain Ash | Leasehold | 77 m² | £75,000 (2022) |
| 5 Thomas Street, Mountain Ash, Mountain Ash | - | 85 m² | - |
| 6 Thomas Street, Mountain Ash | Freehold | 79 m² | £44,500 (2016) |
| 7 Thomas Street, Mountain Ash, Mountain Ash | - | 85 m² | - |
| 8 Thomas Street, Mountain Ash, Mountain Ash | Leasehold | 65 m² | £87,000 (2021) |
| 10, Thomas Street, Mountain Ash | Leasehold | 69 m² | £41,000 (2011) |
| 11, Thomas Street, Mountain Ash | - | 79 m² | - |
| 12 Thomas Street, Mountain Ash | Freehold | 76 m² | £145,000 (2026) |
| 13, Thomas Street, Mountain Ash | - | 94 m² | - |
| 14, Thomas Street, Mountain Ash | Freehold | 91 m² | £57,500 (2021) |
| 15 Thomas Street, Mountain Ash | - | 75 m² | - |
| 16 Thomas Street, Mountain Ash | Freehold | 74 m² | £96,000 (2019) |
| 18 Thomas Street, Mountain Ash, Mountain Ash | Freehold | 92 m² | £750 (2019) |
| 19, Thomas Street, Mountain Ash | - | 66 m² | - |
| 20 Thomas Street, Miskin, Mid Glamorgan | - | 58 m² | - |
| 21, Thomas Street, Mountain Ash | Freehold | 76 m² | £125,000 (2022) |
| 22, Thomas Street, Mountain Ash | Leasehold | 112 m² | £67,950 (2013) |
| 23, Thomas Street, Mountain Ash | - | 65 m² | - |
| 25, Thomas Street, Mountain Ash | Leasehold | 80 m² | £27,000 (2003) |
| 28 Thomas Street, Mountain Ash | Freehold | 64 m² | £95,000 (2022) |
| 29 Thomas Street, Mountain Ash, Mountain Ash | Freehold | 93 m² | £29,000 (2001) |
| 30 Thomas Street, Mountain Ash, Mountain Ash | - | 78 m² | - |
| 31 Thomas Street, Mountain Ash | - | 75 m² | - |
| 32 Thomas Street, Mountain Ash | Leasehold | 86 m² | £34,000 (2016) |
| 33, Thomas Street, Mountain Ash | Leasehold | 87 m² | £75,000 (2006) |
| 34 Thomas Street, Mountain Ash | Freehold | 70 m² | £75,000 (2006) |
| 35, Thomas Street, Mountain Ash | Leasehold | 73 m² | £52,000 (2004) |
| 36, Thomas Street, Mountain Ash | Leasehold | 75 m² | £125,000 (2026) |
| 37 Thomas Street, Mountain Ash, Mountain Ash | Leasehold | 120 m² | £149,950 (2022) |
| 38 Thomas Street, Mountain Ash | - | 81 m² | - |
| 39 Thomas Street, Mountain Ash | Freehold | 85 m² | £85,000 (2022) |
| 40, Thomas Street, Mountain Ash | Freehold | 105 m² | £47,000 (2024) |