| 1 Gertrude Street, Abercynon, Mountain Ash | Freehold | 79 m² | £151,000 (2024) |
| 1A, Gertrude Street, Abercynon, Mountain Ash | Freehold | 72 m² | £18,000 (2000) |
| 1B, Gertrude Street, Abercynon, Mountain Ash | - | 68 m² | - |
| 2, Gertrude Street, Abercynon, Mountain Ash | Freehold | 88 m² | £93,000 (2017) |
| 5 Gertrude Street, Abercynon, Abercynon | - | 85 m² | - |
| 6, Gertrude Street, Abercynon, Mountain Ash | Freehold | 85 m² | £61,000 (2016) |
| 8, Gertrude Street, Abercynon, Mountain Ash | - | 107 m² | - |
| 9 Gertrude Street, Abercynon, Mountain Ash | Freehold | 82 m² | £117,000 (2025) |
| 10, Gertrude Street, Abercynon, Mountain Ash | Freehold | 91 m² | £80,000 (2018) |
| 13, Gertrude Street, Abercynon, Mountain Ash | Freehold | 83 m² | £140,000 (2021) |
| 15, Gertrude Street, Abercynon, Mountain Ash | Freehold | 98 m² | £100,000 (2019) |
| 17, Gertrude Street, Abercynon, Mountain Ash | Freehold | 82 m² | £90,000 (2013) |
| 19, Gertrude Street, Abercynon, Mountain Ash | Freehold | 91 m² | £76,000 (2021) |
| 21, Gertrude Street, Abercynon, Mountain Ash | Freehold | 87 m² | £67,000 (2022) |
| 22 Gertrude Street, Abercynon, Mountain Ash | Freehold | 84 m² | £88,000 (2022) |
| 23 Gertrude Street, Abercynon, Mountain Ash | Freehold | 83 m² | £72,000 (2023) |
| 25, Gertrude Street, Abercynon, Mountain Ash | Freehold | 101 m² | £100,000 (2017) |
| 26 Gertrude Street, Abercynon, Mountain Ash | Freehold | 82 m² | £86,000 (2008) |
| 27 Gertrude Street, Abercynon, Abercynon | - | 82 m² | - |
| 28 Gertrude Street, Abercynon, Mountain Ash | Freehold | 86 m² | £150,000 (2024) |
| 29, Gertrude Street, Abercynon, Mountain Ash | Freehold | 78 m² | £89,000 (2021) |
| 30 Gertrude Street, Abercynon, Mountain Ash | Freehold | 102 m² | £147,000 (2023) |
| 31 Gertrude Street, Abercynon, Mountain Ash | Freehold | 76 m² | £170,000 (2026) |
| 36 Gertrude Street, Abercynon, Mountain Ash | Freehold | 78 m² | £105,000 (2024) |
| 38, Gertrude Street, Abercynon, Mountain Ash | - | 83 m² | - |
| 40, Gertrude Street, Abercynon, Mountain Ash | Freehold | 86 m² | £91,618 (2015) |
| 43, Gertrude Street, Abercynon, Mountain Ash | Freehold | 81 m² | £117,500 (2020) |
| Flat Above Lindsay Constitutional Club, Gertrude Street, Abercynon | - | 40 m² | - |