| 40, Duffryn Street, Mountain Ash | - | 75 m² | - |
| 42, Duffryn Street, Mountain Ash | Freehold | 101 m² | £70,000 (2014) |
| 44 Duffryn Street, Mountain Ash | - | 87 m² | - |
| 46 Duffryn Street, Mountain Ash | Freehold | 71 m² | £50,000 (2006) |
| 47 Duffryn Street, Mountain Ash | Freehold | 72 m² | £60,000 (2007) |
| 48 Duffryn Street, Mountain Ash | Freehold | 60 m² | £65,000 (2008) |
| 49, Duffryn Street, Mountain Ash | - | 79 m² | - |
| 50 Duffryn Street, Mountain Ash, Mountain Ash | Freehold | 69 m² | £33,335 (2008) |
| 52, Duffryn Street, Mountain Ash | Freehold | 50 m² | £35,000 (2017) |
| 53 Duffryn Street, Mountain Ash | Freehold | 67 m² | £55,000 (2024) |
| 54, Duffryn Street, Mountain Ash | Freehold | 60 m² | £73,000 (2019) |
| 56 Duffryn Street, Mountain Ash | Freehold | 66 m² | £55,000 (2010) |
| Flat 1, Glancynon, Duffryn Street, Mountain Ash | - | 52 m² | - |
| Flat 2, Glancynon, Duffryn Street, Mountain Ash | - | 42 m² | - |
| Flat 3, Glancynon, Duffryn Street, Mountain Ash | - | 36 m² | - |
| Flat 4, Glancynon, Duffryn Street, Mountain Ash | - | 28 m² | - |
| Flat 5, Glancynon, Duffryn Street, Mountain Ash | - | 37 m² | - |
| Flat 6 Glancynon, Duffryn Street, Mountain Ash | Freehold | 38 m² | £457,000 (2025) |
| Flat 7, Glancynon, Duffryn Street, Mountain Ash | - | 29 m² | - |
| Flat 8, Glancynon, Duffryn Street, Mountain Ash | - | 32 m² | - |
