| 2 William Street, Abercynon, Mountain Ash | - | 86 m² | - |
| 4 William Street, Abercynon, Mountain Ash | Freehold | 82 m² | £56,500 (2014) |
| 5, William Street, Abercynon, Mountain Ash | Freehold | 96 m² | £128,500 (2018) |
| 8 William Street, Abercynon, Mountain Ash | Freehold | 91 m² | £103,618 (2022) |
| 9, William Street, Abercynon, Mountain Ash | Freehold | 90 m² | £92,000 (2012) |
| 10 William Street, Abercynon, Mountain Ash | Freehold | 87 m² | £159,995 (2023) |
| 12, William Street, Abercynon, Mountain Ash | Freehold | 79 m² | £62,000 (2010) |
| 13 William Street, Abercynon, Mountain Ash | - | 107 m² | - |
| 14 William Street, Abercynon, Mountain Ash | Freehold | 90 m² | £17,000 (2000) |
| 16, William Street, Abercynon, Mountain Ash | Freehold | 99 m² | £105,000 (2019) |
| 19 William Street, Abercynon, Mountain Ash | Freehold | 86 m² | £144,950 (2022) |
| 20 William Street, Abercynon, Mountain Ash | Freehold | 102 m² | £98,000 (2024) |
| 21, William Street, Abercynon, Mountain Ash | Freehold | 103 m² | £80,000 (2010) |
| 22, William Street, Abercynon, Mountain Ash | Freehold | 69 m² | £60,000 (2018) |
| 23 William Street, Abercynon, Mountain Ash | Freehold | 83 m² | £155,000 (2025) |
| 24, William Street, Abercynon, Mountain Ash | Freehold | 81 m² | £130,000 (2021) |
| 25 William Street, Abercynon, Mountain Ash | Freehold | 141 m² | £68,500 (2006) |
| 27, William Street, Abercynon, Mountain Ash | Freehold | 79 m² | £72,500 (2020) |
| 29 William Street, Abercynon, Mountain Ash | Freehold | 94 m² | £167,000 (2024) |
| 31 William Street, Abercynon, Abercynon | Freehold | 85 m² | £106,000 (2026) |
