| 1, Cromwell Street, Merthyr Tydfil | - | 79 m² | - |
| 2, Cromwell Street, Merthyr Tydfil | Freehold | 81 m² | £126,500 (2021) |
| 3 Cromwell Street, Merthyr Tydfil | Freehold | 87 m² | £130,500 (2023) |
| 4, Cromwell Street, Merthyr Tydfil | Freehold | 88 m² | £112,000 (2014) |
| 6, Cromwell Street, Merthyr Tydfil | Freehold | 83 m² | £138,000 (2015) |
| 7 Cromwell Street, Merthyr Tydfil | Freehold | 82 m² | £175,000 (2024) |
| 8 Cromwell Street, Merthyr Tydfil | Freehold | 93 m² | £75,000 (2020) |
| 9, Cromwell Street, Merthyr Tydfil | Freehold | 104 m² | £130,000 (2017) |
| 12, Cromwell Street, Merthyr Tydfil | - | 82 m² | - |
| 13 Cromwell Street, Merthyr Tydfil | Freehold | 97 m² | £175,000 (2026) |
| 16, Cromwell Street, Merthyr Tydfil | Freehold | 93 m² | £137,500 (2017) |
| 18, Cromwell Street, Merthyr Tydfil | Freehold | 113 m² | £188,000 (2025) |
| 20, Cromwell Street, Merthyr Tydfil | - | 119 m² | - |
| 21, Cromwell Street, Merthyr Tydfil | Freehold | 90 m² | £52,000 (2000) |
| 22, Cromwell Street, Merthyr Tydfil | Freehold | 83 m² | £128,000 (2020) |
| 23, Cromwell Street, Merthyr Tydfil | Freehold | 109 m² | £111,000 (2020) |
| 25, Cromwell Street, Merthyr Tydfil | Freehold | 78 m² | £108,000 (2019) |
| 26 Cromwell Street, Merthyr Tydfil | Freehold | 79 m² | £94,000 (2018) |
| 27 Cromwell Street, Merthyr Tydfil | Freehold | 92 m² | £87,000 (2013) |
| 29 Cromwell Street, Merthyr Tydfil | Freehold | 83 m² | £62,000 (2017) |
| 30, Cromwell Street, Merthyr Tydfil | Freehold | 85 m² | £83,000 (2005) |
| 33 Cromwell Street, Merthyr Tydfil, Merthyr Tydfil | Freehold | 86 m² | £145,000 (2023) |
| 34 Cromwell Street, Merthyr Tydfil, Merthyr Tydfil | Freehold | 99 m² | £135,000 (2021) |
| 35, Cromwell Street, Merthyr Tydfil | Freehold | 96 m² | £85,000 (2014) |
| 36, Cromwell Street, Merthyr Tydfil | Freehold | 83 m² | £93,000 (2011) |
| 37 Cromwell Street, Merthyr Tydfil | Freehold | 95 m² | £43,000 (1999) |
| 38 Cromwell Street, Merthyr Tydfil, Merthyr Tydfil | Freehold | 101 m² | £120,000 (2021) |
| 39, Cromwell Street, Merthyr Tydfil | Freehold | 82 m² | £27,500 (2000) |
| 40, Cromwell Street, Merthyr Tydfil | Freehold | 93 m² | £86,000 (2014) |