14, Thomas Street, Mountain Ash has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 02 May 2019.

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

14, Thomas Street, Mountain Ash last changed hands on 19th February 2021, selling for £57,500. The transaction was logged as a leasehold house by HM Land Registry.

That is its only recorded sale since 1995.

The market for similar properties has risen by 62.3% since February 2021.

• Sold Feb 2021£57,500

Land Registry records and our Estate Agent network show 133 sales of comparable properties within 600 metres of 14, Thomas Street, Mountain Ash since 2016.

Most recently, 3, Gwernifor Street, Mountain Ash, CF45 3NA, a freehold house, sold at £150,000 on the 3rd February 2026.

Read more about house prices in CF45.

• Sold Feb 2026£150,000 | 3 Bed House3, Gwernifor Street, Mountain Ash, CF45 3NA3, Gwernifor Street, Mountain Ash, CF45 3NA
• Sold Nov 2025£108,000 | 3 Bed House111, Woodfield Terrace, Mountain Ash, CF45 3UT111, Woodfield Terrace, Mountain Ash, CF45 3UT
• Sold Nov 2025£65,000 | 3 Bed House110, Woodfield Terrace, Mountain Ash, CF45 3UT110, Woodfield Terrace, Mountain Ash, CF45 3UT
• Sold Oct 2025£112,000 | 3 Bed House32, Oakland Street, Mountain Ash, CF45 3AL32, Oakland Street, Mountain Ash, CF45 3AL
• Sold Sep 2025£47,000 | 3 Bed House101, Penrhiwceiber Road, Mountain Ash, CF45 3SF101, Penrhiwceiber Road, Mountain Ash, CF45 3SF
• Sold Sep 2025£130,000 | 3 Bed House14, Oakland Street, Mountain Ash, CF45 3AL14, Oakland Street, Mountain Ash, CF45 3AL
• Sold Aug 2025£110,000 | 3 Bed House10, Cilhaul Terrace, Mountain Ash, CF45 3ND10, Cilhaul Terrace, Mountain Ash, CF45 3ND
• Sold Jun 2025£135,000 | 3 Bed House3, Glancynon Street, Mountain Ash, CF45 3YU3, Glancynon Street, Mountain Ash, CF45 3YU
• Sold Jun 2025£98,000 | 3 Bed House96, Clarence Street, Mountain Ash, CF45 3BD96, Clarence Street, Mountain Ash, CF45 3BD
• Sold Jun 2025£127,500 | 3 Bed House27, Edward Street, Mountain Ash, CF45 3AJ27, Edward Street, Mountain Ash, CF45 3AJ
• Sold Apr 2025£74,100 | 3 Bed House6, Edward Street, Mountain Ash, CF45 3AJ6, Edward Street, Mountain Ash, CF45 3AJ
• Sold Jul 2024£128,000 | 3 Bed House109, Penrhiwceiber Road, Mountain Ash, CF45 3SF109, Penrhiwceiber Road, Mountain Ash, CF45 3SF
• Sold Apr 2024£117,000 | 3 Bed HouseGlanffrwd Villa, Woodfield Terrace, Mountain Ash, CF45 3UTGlanffrwd Villa, Woodfield Terrace, Mountain Ash, CF45 3UT
• Sold Nov 2023£148,000 | 3 Bed House22, Edward Street, Mountain Ash, CF45 3AJ22, Edward Street, Mountain Ash, CF45 3AJ
• Sold May 2023£115,000 | 3 Bed House40, Oakland Street, Mountain Ash, CF45 3AL40, Oakland Street, Mountain Ash, CF45 3AL
• Sold Jan 2022£85,000 | 3 Bed House39, Thomas Street, Mountain Ash, CF45 3BU39, Thomas Street, Mountain Ash, CF45 3BU
• Sold Jan 2022£135,000 | 3 Bed House29, Oakland Street, Mountain Ash, CF45 3AL29, Oakland Street, Mountain Ash, CF45 3AL
• Sold Oct 2019£58,900 | 3 Bed House37, Oakland Street, Mountain Ash, CF45 3AL37, Oakland Street, Mountain Ash, CF45 3AL
• Sold Jun 2019£750 | 3 Bed House18, Thomas Street, Mountain Ash, CF45 3BU18, Thomas Street, Mountain Ash, CF45 3BU
• Sold Jun 2016£34,000 | 3 Bed House32, Thomas Street, Mountain Ash, CF45 3BU32, Thomas Street, Mountain Ash, CF45 3BU

Our analysis of the public data ranks 14, Thomas Street, Mountain Ash as the 14th largest and the 12th most expensive of the 73 addresses on Thomas Street, Mountain Ash, CF45.

Against the CF45 postcode district average, it is £15k less expensive than the typical property.

• Mountain Ash

  |

  800 m away
• Penrhiwceiber

  |

  1.0 km away
• Fernhill

  |

  2.1 km away

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