| 1 William Street, Pontypridd | Freehold | 71 m² | £15,500 (2002) |
| 1A, William Street, Pontypridd | Freehold | 82 m² | £87,500 (2019) |
| 2, William Street, Pontypridd | Freehold | 85 m² | £168,000 (2022) |
| 5 William Street, Pontypridd | Freehold | 82 m² | £40,000 (2003) |
| 6, William Street, Pontypridd | Freehold | 75 m² | £134,850 (2024) |
| 9, William Street, Pontypridd | Freehold | 79 m² | £39,500 (2001) |
| 16 William Street, Pontypridd | Freehold | 72 m² | £59,000 (2013) |
| 18 William Street, Cilfynydd, Pontypridd | Freehold | 76 m² | £127,000 (2021) |
| 19, William Street, Pontypridd | Freehold | 77 m² | £153,000 (2025) |
| 23, William Street, Pontypridd | Freehold | 82 m² | £55,000 (2011) |
| 24, William Street, Pontypridd | Freehold | 74 m² | £125,000 (2021) |
| 28 William Street, Pontypridd | Freehold | 78 m² | £127,500 (2025) |
| 29, William Street, Pontypridd | Freehold | 79 m² | £130,000 (2021) |
| 30 William Street, Pontypridd | Freehold | 84 m² | £90,000 (2023) |
| 31, William Street, Pontypridd | Freehold | 74 m² | £41,500 (2017) |
| 32, William Street, Pontypridd | Freehold | 82 m² | £15,000 (1998) |
| 35, William Street, Pontypridd | Freehold | 77 m² | £89,950 (2021) |
| 36, William Street, Pontypridd | - | 98 m² | - |
| 37 William Street, Pontypridd | Freehold | 72 m² | £127,500 (2024) |
| 38 William Street, Pontypridd | - | 83 m² | - |
| 39 William Street, Pontypridd | Freehold | 75 m² | £76,500 (2012) |
| 41 William Street, Cilfynydd, Pontypridd, Pontypridd | Freehold | 88 m² | £147,000 (2024) |