According to data from HM Land Registry, 20, Arthur Street, Mountain Ash sits on a plot of 151 m².

We have plot size data on 46 out of 51 other houses in the postcode and 20, Arthur Street, Mountain Ash sits on the 22nd largest plot.

20, Arthur Street, Mountain Ash has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 04 Mar 2025.

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 the Land Registry and our network of Estate Agents, there have been 65 sales of properties similar to 20, Arthur Street, Mountain Ash within a radius of 690 metres since 2015.

The most recent example is 38, Harcourt Terrace, Mountain Ash, CF45 3SD, a freehold house which sold for £97,000 on the 12th January 2026.

Read more about house prices in CF45.

• Sold Jan 2026£97,000 | 3 Bed House38, Harcourt Terrace, Mountain Ash, CF45 3SD38, Harcourt Terrace, Mountain Ash, CF45 3SD
• Sold Aug 2025£50,000 | 3 Bed House47, Victoria Street, Mountain Ash, CF45 3AP47, Victoria Street, Mountain Ash, CF45 3AP
• Sold Jul 2025£95,000 | 3 Bed House38, Albert Street, Mountain Ash, CF45 3BA38, Albert Street, Mountain Ash, CF45 3BA
• Sold Jun 2025£66,000 | 3 Bed House40B, Glyngwyn Street, Mountain Ash, CF45 3AF40B, Glyngwyn Street, Mountain Ash, CF45 3AF
• Sold May 2025£101,000 | 3 Bed House40, Arthur Street, Mountain Ash, CF45 3BL40, Arthur Street, Mountain Ash, CF45 3BL
• Sold May 2025£103,000 | 3 Bed House15, Albany Street, Mountain Ash, CF45 3BE15, Albany Street, Mountain Ash, CF45 3BE
• Sold May 2025£119,000 | 3 Bed House74, Victoria Street, Mountain Ash, CF45 3AP74, Victoria Street, Mountain Ash, CF45 3AP
• Sold Apr 2025£72,000 | 3 Bed House16, Albert Street, Mountain Ash, CF45 3BA16, Albert Street, Mountain Ash, CF45 3BA
• Sold Sep 2024£81,000 | 3 Bed House34, Glyngwyn Street, Mountain Ash, CF45 3AF34, Glyngwyn Street, Mountain Ash, CF45 3AF
• Sold Jul 2024£108,000 | 3 Bed House41, Arthur Street, Mountain Ash, CF45 3BL41, Arthur Street, Mountain Ash, CF45 3BL
• Sold May 2024£62,000 | 3 Bed House89, Victoria Street, Mountain Ash, CF45 3AP89, Victoria Street, Mountain Ash, CF45 3AP
• Sold Jul 2023£80,000 | 3 Bed House30, Glyngwyn Street, Mountain Ash, CF45 3AF30, Glyngwyn Street, Mountain Ash, CF45 3AF
• Sold Oct 2022£95,000 | 3 Bed House11, Glyngwyn Street, Mountain Ash, CF45 3AF11, Glyngwyn Street, Mountain Ash, CF45 3AF
• Sold Jun 2022£109,950 | 3 Bed House84, Victoria Street, Mountain Ash, CF45 3AP84, Victoria Street, Mountain Ash, CF45 3AP
• Sold Feb 2022£70,050 | 3 Bed House54, Glyngwyn Street, Mountain Ash, CF45 3AF54, Glyngwyn Street, Mountain Ash, CF45 3AF
• Sold Oct 2021£58,000 | 3 Bed House61, Victoria Street, Mountain Ash, CF45 3AP61, Victoria Street, Mountain Ash, CF45 3AP
• Sold Mar 2019£50,000 | 3 Bed House11, Arthur Street, Mountain Ash, CF45 3BL11, Arthur Street, Mountain Ash, CF45 3BL
• Sold Jan 2018£43,000 | 3 Bed House39, Arthur Street, Mountain Ash, CF45 3BL39, Arthur Street, Mountain Ash, CF45 3BL
• Sold Nov 2016£43,000 | 3 Bed House29, Arthur Street, Mountain Ash, CF45 3BL29, Arthur Street, Mountain Ash, CF45 3BL
• Sold Mar 2015£35,000 | 3 Bed House1, Arthur Street, Mountain Ash, CF45 3BL1, Arthur Street, Mountain Ash, CF45 3BL

Arthur Street, Mountain Ash, CF45 has a total of 51 addresses. According to our analysis of all the public data, 20, Arthur Street, Mountain Ash is the 42nd largest and the 42nd most expensive property on the street.

When compared to the postcode district it is £63k less expensive than the average property in CF45.

• Mountain Ash

  |

  1.0 km away
• Penrhiwceiber

  |

  1.1 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.