13, Thomas Street, Mountain Ash has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 16 Jul 2015.

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 610 metres of 13, Thomas Street, Mountain Ash since 2016.

Most recently, 111, Woodfield Terrace, Mountain Ash, CF45 3UT, a freehold house, sold at £108,000 on the 14th November 2025.

Read more about house prices in CF45.

• Sold Nov 2025£108,000 | 3 Bed House111, Woodfield Terrace, Mountain Ash, CF45 3UT111, Woodfield Terrace, Mountain Ash, CF45 3UT
• Sold Nov 2025£120,000 | 3 Bed House100, Woodfield Terrace, Mountain Ash, CF45 3UT100, Woodfield Terrace, Mountain Ash, CF45 3UT
• 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 Jun 2024£47,000 | 3 Bed House40, Thomas Street, Mountain Ash, CF45 3BU40, Thomas Street, Mountain Ash, CF45 3BU
• 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 Oct 2021£105,000 | 3 Bed House16, Consort Street, Mountain Ash, CF45 3AY16, Consort Street, Mountain Ash, CF45 3AY
• Sold Sep 2021£99,000 | 3 Bed House5, Harcourt Terrace, Mountain Ash, CF45 3SD5, Harcourt Terrace, Mountain Ash, CF45 3SD
• Sold Feb 2021£57,500 | 3 Bed House14, Thomas Street, Mountain Ash, CF45 3BU14, Thomas Street, Mountain Ash, CF45 3BU
• 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 13, Thomas Street, Mountain Ash as the 9th largest and the 9th most expensive of the 73 addresses on Thomas Street, Mountain Ash, CF45.

Against the CF45 postcode district average, it is £13k 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.