According to data from HM Land Registry, 19, Union Street, Merthyr Tydfil sits on a plot of 109 m².

We have plot size data on 19 out of 23 other houses in the postcode and 19, Union Street, Merthyr Tydfil sits on the 10th largest plot.

19, Union Street, Merthyr Tydfil has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 23 Jan 2019.

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

According to HM Land Registry, 19, Union Street, Merthyr Tydfil was last sold on 24th March 2017 for £42,500 and was recorded as a freehold house.

The property has only had this single sale since 1995.

Since March 2017, the market for similar properties has risen by 106.9%.

• Sold Mar 2017£42,500

According to the Land Registry and our network of Estate Agents, there have been 132 sales of properties similar to 19, Union Street, Merthyr Tydfil within a radius of 570 metres since 2016.

The most recent example is 17, Mary Street, Merthyr Tydfil, CF47 0PY, a freehold house which sold for £172,000 on the 7th November 2025.

Read more about house prices in CF47.

• Sold Nov 2025£172,000 | 3 Bed House17, Mary Street, Merthyr Tydfil, CF47 0PY17, Mary Street, Merthyr Tydfil, CF47 0PY
• Sold Sep 2025£125,000 | 3 Bed House6, William Street, Merthyr Tydfil, CF47 0RG6, 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 Mar 2025£4,000 | 3 Bed House16, Mary Street, Merthyr Tydfil, CF47 0PY16, Mary Street, Merthyr Tydfil, CF47 0PY
• Sold Feb 2025£138,000 | 3 Bed House13, Mary Street, Merthyr Tydfil, CF47 0PY13, Mary Street, Merthyr Tydfil, CF47 0PY
• 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 Aug 2023£95,000 | 3 Bed House92, Lower Thomas Street, Merthyr Tydfil, CF47 0DA92, Lower Thomas Street, Merthyr Tydfil, CF47 0DA
• Sold Mar 2023£130,000 | 3 Bed House3, Argyle Street, Merthyr Tydfil, CF47 0NS3, Argyle Street, Merthyr Tydfil, CF47 0NS
• 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 Apr 2021£84,000 | 3 Bed House89, Lower Thomas Street, Merthyr Tydfil, CF47 0DA89, 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 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 2016£90,000 | 3 Bed House16, New Castle Street, Merthyr Tydfil, CF47 0BH16, New Castle Street, Merthyr Tydfil, CF47 0BH

Union Street, Merthyr Tydfil, CF47 has a total of 23 addresses. According to our analysis of all the public data, 19, Union Street, Merthyr Tydfil is the 22nd largest and the 22nd most expensive property on the street.

When compared to the postcode district it is £3k less expensive than the average property in CF47.

• Merthyr Tydfil

  |

  300 m away
• Pentre-Bach

  |

  2.6 km away
• Troed-y-rhiw

  |

  4.3 km away

According to data from the Environment Agency, the flood risk in this area is considered to be Very Low.