| 16 Castle Street, Builth Wells, LD2 3BN | Jul 2026 | £210,000 | Semi-detached | Freehold |
| 18 Castle Street, Builth Wells, LD2 3BN | May 2025 | £140,000 | Semi-detached | Freehold |
| 10 Castle Street, Builth Wells, LD2 3BN | Mar 2025 | £220,000 | Terraced | Freehold |
| 8 Castle Street, Builth Wells, LD2 3BN | Feb 2025 | £137,500 | Terraced | Freehold |
| 27 Castle Street, Builth Wells, LD2 3BN | Apr 2024 | £170,000 | Terraced | Freehold |
| 13 Castle Street, Builth Wells, LD2 3BN | Nov 2023 | £80,000 | Flat / maisonette | Leasehold |
| 24 Castle Street, Builth Wells, LD2 3BN | Nov 2023 | £178,000 | Semi-detached | Freehold |
| 33 Castle Street, Builth Wells, LD2 3BN | Oct 2022 | £300,000 | Other property | Freehold |
| 22 Castle Street, Builth Wells, LD2 3BN | Jul 2022 | £145,000 | Semi-detached | Freehold |
| 26A Castle Street, Builth Wells, LD2 3BN | Mar 2022 | £167,000 | Semi-detached | Freehold |
| 26 Castle Street, Builth Wells, LD2 3BN | Jan 2022 | £170,000 | Semi-detached | Freehold |
| 28 Castle Street, Builth Wells, LD2 3BN | Dec 2021 | £215,000 | Semi-detached | Freehold |
| 32 Castle Street, Builth Wells, LD2 3BN | Apr 2021 | £195,000 | Semi-detached | Freehold |
| 20 Castle Street, Builth Wells, LD2 3BN | Jan 2021 | £143,000 | Semi-detached | Freehold |
| Garden Flat, 13 Castle Street, Builth Wells, LD2 3BN | Nov 2020 | £58,500 | Flat / maisonette | Leasehold |
| 6 Castle Street, Builth Wells, LD2 3BN | Apr 2018 | £115,000 | Semi-detached | Freehold |
| 25 Castle Street, Builth Wells, LD2 3BN | May 2017 | £145,000 | Terraced | Freehold |
| 12 Castle Street, Builth Wells, LD2 3BN | Mar 2017 | £140,000 | Terraced | Freehold |
| 23 Castle Street, Builth Wells, LD2 3BN | Mar 2012 | £115,000 | Terraced | Freehold |
| 4 Castle Street, Builth Wells, LD2 3BN | Feb 2012 | £70,000 | Terraced | Freehold |
| 21 Castle Street, Builth Wells, LD2 3BN | Jul 2002 | £53,000 | Terraced | Freehold |
| 14 Castle Street, Builth Wells, LD2 3BN | Aug 1997 | £55,000 | Terraced | Freehold |