According to data from HM Land Registry, 33, Thomas Street, Mountain Ash sits on a plot of 132 m².

We have plot size data on 24 out of 41 other houses in the postcode and 33, Thomas Street, Mountain Ash sits on the 22nd largest plot.

33, Thomas Street, Mountain Ash has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 12 May 2018.

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, 33, Thomas Street, Mountain Ash was last sold on 9th June 2006 for £75,000 and was recorded as a freehold house.

The property has only had this single sale since 1995.

• Sold Jun 2006£75,000

According to the Land Registry and our network of Estate Agents, there have been 169 sales of properties similar to 33, Thomas Street, Mountain Ash within a radius of 630 metres since 2016.

The most recent example is 12, Thomas Street, Mountain Ash, CF45 3BU, a freehold house which sold for £145,000 on the 20th February 2026.

Read more about house prices in CF45.

• Sold Feb 2026£145,000 | 3 Bed House12, Thomas Street, Mountain Ash, CF45 3BU12, Thomas Street, Mountain Ash, CF45 3BU
• 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£130,000 | 3 Bed House14, Oakland Street, Mountain Ash, CF45 3AL14, Oakland Street, Mountain Ash, CF45 3AL
• 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 Jan 2025£95,000 | 3 Bed House47, Albert Street, Mountain Ash, CF45 3BA47, Albert Street, Mountain Ash, CF45 3BA
• Sold Aug 2024£137,500 | 3 Bed House27, Oakland Street, Mountain Ash, CF45 3AL27, Oakland Street, Mountain Ash, CF45 3AL
• Sold Apr 2024£117,000 | 3 Bed HouseGlanffrwd Villa, Woodfield Terrace, Mountain Ash, CF45 3UTGlanffrwd Villa, Woodfield Terrace, Mountain Ash, CF45 3UT
• Sold May 2023£115,000 | 3 Bed House40, Oakland Street, Mountain Ash, CF45 3AL40, Oakland Street, Mountain Ash, CF45 3AL
• Sold May 2022£75,000 | 3 Bed House4, Thomas Street, Mountain Ash, CF45 3BU4, Thomas Street, Mountain Ash, CF45 3BU
• Sold Apr 2022£125,000 | 3 Bed House21, Thomas Street, Mountain Ash, CF45 3BU21, Thomas Street, Mountain Ash, CF45 3BU
• 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 Feb 2021£57,500 | 3 Bed House14, Thomas Street, Mountain Ash, CF45 3BU14, Thomas Street, Mountain Ash, CF45 3BU
• 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 May 2019£55,000 | 3 Bed House36, Thomas Street, Mountain Ash, CF45 3BU36, 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

Thomas Street, Mountain Ash, CF45 has a total of 73 addresses. According to our analysis of all the public data, 33, Thomas Street, Mountain Ash is the 15th largest and the 13th most expensive property on the street.

When compared to the postcode district it is £18k less expensive than the average property in CF45.

• Mountain Ash

  |

  800 m away
• Penrhiwceiber

  |

  1.0 km away
• Fernhill

  |

  2.1 km away

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