| 2 Union Street, Carmarthen | Freehold | 134 m² | £120,000 (2007) |
| 4, Union Street, Carmarthen | Freehold | 105 m² | £28,500 (2000) |
| 5, Union Street, Carmarthen | Freehold | 137 m² | £156,000 (2014) |
| 6, Union Street, Carmarthen | Freehold | 135 m² | £113,000 (2005) |
| 7, Union Street, Carmarthen | Freehold | 112 m² | £112,500 (2017) |
| 9, Union Street, Carmarthen | Freehold | 95 m² | £150,000 (2010) |
| 11 Union Street, Carmarthen | Freehold | 216 m² | £211,000 (2008) |
| 11A, Union Street, Carmarthen | Freehold | 126 m² | £167,500 (2023) |
| 11B Union Street, Carmarthen | Freehold | 109 m² | £142,500 (2024) |
| 11C, Union Street, Carmarthen | - | 53 m² | - |
| 13 Union Street, Carmarthen, Carmarthen | Freehold | 110 m² | £175,000 (2022) |
| 13A, Union Street, Carmarthen | Freehold | 212 m² | £177,500 (2016) |
| 14, Union Street, Carmarthen | - | 54 m² | - |
| 14B Union Street, Carmarthen | - | 46 m² | - |
| 16 Union Street, Carmarthen, Carmarthen | Freehold | 123 m² | £149,995 (2022) |
| 17 Union Street, Carmarthen | Freehold | 129 m² | £130,000 (2023) |
| 20, Union Street, Carmarthen | Leasehold | 38 m² | £51,500 (2021) |
| 22 Union Street, Carmarthen | Freehold | 105 m² | £175,000 (2025) |
| 23, Union Street, Carmarthen | - | 99 m² | - |
| 24 Union Street, Carmarthen | Freehold | 164 m² | £135,000 (2023) |
| 25, Union Street, Carmarthen | Freehold | 63 m² | £154,000 (2023) |
| 26, Union Street, Carmarthen | Freehold | 75 m² | £78,000 (2019) |
| 27, Union Street, Carmarthen | Freehold | 111 m² | £51,000 (2000) |
| Basement Flat, 15 Union Street, Carmarthen | - | 57 m² | - |
| Chapel House, Union Street, Carmarthen | - | 86 m² | - |
| Flat 1, Hafan Deg, Union Street, Carmarthen | - | 44 m² | - |
| Flat 2, 20 Union Street, Carmarthen | Leasehold | 58 m² | £50,000 (2005) |
| Flat 2, 21 Union Street, Carmarthen | - | 62 m² | - |
| Flat 2, Hafan Deg, Union Street, Carmarthen | - | 38 m² | - |
| Flat 3, Hafan Deg, Union Street, Carmarthen | - | 42 m² | - |
| Flat 4, Hafan Deg, Union Street, Carmarthen | - | 45 m² | - |
| Top Floor Flat, 15 Union Street, Carmarthen | - | 95 m² | - |