12, Union Street, Merthyr Tydfil occupies a 124 m² plot as recorded by HM Land Registry.

Of the 23 other houses in this postcode, 19 have recorded plot sizes, and this one ranks as the largest.

12, Union Street, Merthyr Tydfil has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 06 Apr 2021.

The property is connected to mains gas and has fully double glazed windows. It is heated using a boiler and radiators (mains gas).

Land Registry records and our Estate Agent network show 113 sales of comparable properties within 570 metres of 12, Union Street, Merthyr Tydfil since 2016.

Most recently, 37, William Street, Merthyr Tydfil, CF47 0RG, a freehold house, sold at £125,000 on the 6th March 2026.

Read more about house prices in CF47.

• Sold Mar 2026£125,000 | 3 Bed House37, William Street, Merthyr Tydfil, CF47 0RG37, William Street, Merthyr Tydfil, CF47 0RG
• Sold Jun 2025£145,000 | 3 Bed House7, New Castle Street, Merthyr Tydfil, CF47 0BH7, New Castle Street, Merthyr Tydfil, CF47 0BH
• Sold Jan 2025£129,000 | 3 Bed House100, Lower Thomas Street, Merthyr Tydfil, CF47 0DA100, Lower Thomas Street, Merthyr Tydfil, CF47 0DA
• Sold May 2024£152,000 | 3 Bed House9, New Castle Street, Merthyr Tydfil, CF47 0BH9, New Castle Street, Merthyr Tydfil, CF47 0BH
• Sold Mar 2024£145,000 | 3 Bed House6, Cobden Place, Merthyr Tydfil, CF47 0EF6, Cobden Place, Merthyr Tydfil, CF47 0EF
• Sold Sep 2022£125,000 | 3 Bed House40, Union Terrace, Merthyr Tydfil, CF47 0DY40, Union Terrace, Merthyr Tydfil, CF47 0DY
• Sold Jul 2022£135,000 | 3 Bed House10, New Castle Street, Merthyr Tydfil, CF47 0BH10, New Castle Street, Merthyr Tydfil, CF47 0BH
• Sold Jun 2022£140,000 | 3 Bed House72, Lower Thomas Street, Merthyr Tydfil, CF47 0DA72, Lower Thomas Street, Merthyr Tydfil, CF47 0DA
• Sold Jun 2021£106,000 | 3 Bed House69, Lower Thomas Street, Merthyr Tydfil, CF47 0DA69, Lower Thomas Street, Merthyr Tydfil, CF47 0DA
• Sold Nov 2020£119,950 | 3 Bed House43, Union Terrace, Merthyr Tydfil, CF47 0DY43, Union Terrace, Merthyr Tydfil, CF47 0DY
• Sold Oct 2020£111,500 | 3 Bed House5, Union Street, Merthyr Tydfil, CF47 0EB5, Union Street, Merthyr Tydfil, CF47 0EB
• Sold Jan 2020£123,000 | 4 Bed House46, Union Terrace, Merthyr Tydfil, CF47 0DY46, Union Terrace, Merthyr Tydfil, CF47 0DY
• Sold Dec 2019£84,000 | 3 Bed House95, Lower Thomas Street, Merthyr Tydfil, CF47 0DA95, Lower Thomas Street, Merthyr Tydfil, CF47 0DA
• Sold Nov 2018£59,500 | 3 Bed House83, Lower Thomas Street, Merthyr Tydfil, CF47 0DA83, Lower Thomas Street, Merthyr Tydfil, CF47 0DA
• Sold Aug 2018£80,000 | 3 Bed House39, Union Terrace, Merthyr Tydfil, CF47 0DY39, Union Terrace, Merthyr Tydfil, CF47 0DY
• Sold Jul 2018£85,000 | 3 Bed House80, Lower Thomas Street, Merthyr Tydfil, CF47 0DA80, Lower Thomas Street, Merthyr Tydfil, CF47 0DA
• Sold Jan 2018£90,000 | 3 Bed House31, Upper Thomas Street, Merthyr Tydfil, CF47 0BN31, Upper Thomas Street, Merthyr Tydfil, CF47 0BN
• Sold Mar 2017£42,500 | 3 Bed House19, Union Street, Merthyr Tydfil, CF47 0EB19, Union Street, Merthyr Tydfil, CF47 0EB
• Sold Aug 2016£71,000 | 3 Bed House12, New Castle Street, Merthyr Tydfil, CF47 0BH12, New Castle Street, Merthyr Tydfil, CF47 0BH
• Sold Jan 2016£90,000 | 3 Bed House16, New Castle Street, Merthyr Tydfil, CF47 0BH16, New Castle Street, Merthyr Tydfil, CF47 0BH

Our analysis of the public data ranks 12, Union Street, Merthyr Tydfil as the 12th largest and the 12th most expensive of the 23 addresses on Union Street, Merthyr Tydfil, CF47.

Against the CF47 postcode district average, it is £3k more expensive than the typical property.

• Merthyr Tydfil

  |

  300 m away
• Pentre-Bach

  |

  2.6 km away
• Troed-y-rhiw

  |

  4.3 km away

Environment Agency data suggests this area has a Very Low risk of flooding.