| 2 The Triangle, Mountain Ash | Freehold | 84 m² | £70,000 (2015) |
| 3, The Triangle, Mountain Ash | - | 89 m² | - |
| 6, The Triangle, Mountain Ash | Freehold | 77 m² | £75,000 (2012) |
| 10 The Triangle, Mountain Ash | Freehold | 100 m² | £160,000 (2026) |
| 12 The Triangle, Mountain Ash, Mountain Ash | Freehold | 79 m² | £73,500 (2006) |
| 13, The Triangle, Mountain Ash | Freehold | 106 m² | £71,500 (2019) |
| 14 The Triangle, Mountain Ash, Mountain Ash | Freehold | 78 m² | £63,000 (2004) |
| 15, The Triangle, Mountain Ash | Freehold | 89 m² | £30,000 (2000) |
| 16 The Triangle, Mountain Ash | Freehold | 115 m² | £108,500 (2010) |
| 19, The Triangle, Mountain Ash | Freehold | 99 m² | £91,000 (2015) |
| 21, The Triangle, Mountain Ash | Freehold | 84 m² | £85,000 (2022) |
| 23, The Triangle, Mountain Ash | Freehold | 89 m² | £82,000 (2007) |
| 24 The Triangle, Mountain Ash | Freehold | 99 m² | £144,000 (2024) |
| 25 The Triangle, Mountain Ash | Freehold | 99 m² | £150,000 (2021) |
| 26 The Triangle, Mountain Ash | Freehold | 93 m² | £130,000 (2025) |
| 27 The Triangle, Mountain Ash | Freehold | 75 m² | £175,000 (2025) |
| 29 The Triangle, Mountain Ash | Freehold | 86 m² | £149,995 (2022) |
| 30, The Triangle, Mountain Ash | Freehold | 99 m² | £123,000 (2021) |
| 32, The Triangle, Mountain Ash | - | 90 m² | - |
| 34 The Triangle, Mountain Ash | Freehold | 87 m² | £169,995 (2025) |
| 35, The Triangle, Mountain Ash | Freehold | 80 m² | £92,000 (2013) |
| 39 The Triangle, Mountain Ash | Freehold | 112 m² | £242,000 (2024) |
| 40, The Triangle, Mountain Ash | - | 172 m² | - |
