| Arfryn, Trecastle, Brecon | Freehold | 109 m² | £175,000 (2021) |
| Bryn Haul, Trecastle, Brecon | - | 118 m² | - |
| Bryn Heulog, Trecastle, Brecon | Freehold | 148 m² | £90,000 (2012) |
| Canol Dre, Trecastle, Brecon | Freehold | 123 m² | £97,000 (2003) |
| Canol Maes, Trecastle, Brecon | Freehold | 57 m² | £122,000 (2021) |
| Car Tref, Trecastle, Brecon | Freehold | 92 m² | £91,000 (2013) |
| Crown House, Trecastle, Brecon | Freehold | 101 m² | £149,500 (2006) |
| Danycoed, Trecastle, Brecon | Freehold | 123 m² | £260,000 (2018) |
| Glan Logyn, Trecastle, Brecon | Freehold | 66 m² | £145,000 (2012) |
| Glynmeddyg, Trecastle, Brecon | Freehold | 115 m² | £10,500 (1997) |
| Llyswen, Trecastle, Brecon | - | 76 m² | - |
| Login House, Trecastle, Brecon | - | 102 m² | - |
| London House, Trecastle, Brecon | Freehold | 251 m² | £298,000 (2024) |
| Nuthatch Cottage, Trecastle, Brecon | Freehold | 105 m² | £235,000 (2021) |
| Oakleigh House, Trecastle, Brecon | Freehold | 131 m² | £85,000 (2026) |
| The Old School House, Trecastle, Brecon | Freehold | 96 m² | £134,000 (2014) |
| Tygwyn, Trecastle, Brecon | Freehold | 84 m² | £15,000 (1995) |
| Velindre, Trecastle, Brecon | Freehold | 96 m² | £135,000 (2016) |
