HM Land Registry records the plot of land for 9, Pentwyn Avenue, Mountain Ash as measuring 152 m².

That makes it the 37th largest plot in the postcode, where 63 of the 66 other houses have recorded plot data.

9, Pentwyn Avenue, Mountain Ash has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 29 Mar 2023.

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

Since 2016 99 properties similar to 9, Pentwyn Avenue, Mountain Ash have sold within a radius of 1.4 kilometres, per the Land Registry and our network of Estate Agents.

The latest, on the 12th June 2026, was 206, Bryntirion, Mountain Ash, CF45 4EJ, a freehold house which sold for £80,000.

Read more about house prices in CF45.

• Sold Jun 2026£80,000 | 3 Bed House206, Bryntirion, Mountain Ash, CF45 4EJ206, Bryntirion, Mountain Ash, CF45 4EJ
• Sold Dec 2025£82,950 | 3 Bed House96, Bryntirion, Mountain Ash, CF45 4EX96, Bryntirion, Mountain Ash, CF45 4EX
• Sold Nov 2025£88,000 | 3 Bed House134, Bryntirion, Mountain Ash, CF45 4EX134, Bryntirion, Mountain Ash, CF45 4EX
• Sold Oct 2025£60,500 | 3 Bed House123, Pentwyn Avenue, Mountain Ash, CF45 4YE123, Pentwyn Avenue, Mountain Ash, CF45 4YE
• Sold Sep 2025£75,000 | 3 Bed House7, Walsh Street, Mountain Ash, CF45 4YS7, Walsh Street, Mountain Ash, CF45 4YS
• Sold Aug 2025£83,000 | 3 Bed House90, Bryntirion, Mountain Ash, CF45 4EX90, Bryntirion, Mountain Ash, CF45 4EX
• Sold Jun 2025£59,000 | 3 Bed House2, Walsh Street, Mountain Ash, CF45 4YS2, Walsh Street, Mountain Ash, CF45 4YS
• Sold May 2025£86,000 | 3 Bed House179, Bryntirion, Mountain Ash, CF45 4PJ179, Bryntirion, Mountain Ash, CF45 4PJ
• Sold Jun 2024£65,000 | 3 Bed House3, Homerton Street, Mountain Ash, CF45 4YP3, Homerton Street, Mountain Ash, CF45 4YP
• Sold Apr 2024£80,000 | 3 Bed House199, Bryntirion, Mountain Ash, CF45 4PJ199, Bryntirion, Mountain Ash, CF45 4PJ
• Sold Nov 2023£80,000 | 3 Bed House102, Bryntirion, Mountain Ash, CF45 4EX102, Bryntirion, Mountain Ash, CF45 4EX
• Sold Jun 2023£165,000 | 3 Bed House59, Pentwyn Avenue, Mountain Ash, CF45 4YE59, Pentwyn Avenue, Mountain Ash, CF45 4YE
• Sold Dec 2022£35,000 | 3 Bed House55, Pentwyn Avenue, Mountain Ash, CF45 4YE55, Pentwyn Avenue, Mountain Ash, CF45 4YE
• Sold Jul 2022£105,000 | 3 Bed House13, Walsh Street, Mountain Ash, CF45 4YS13, Walsh Street, Mountain Ash, CF45 4YS
• Sold Jun 2021£60,000 | 3 Bed House17, Pentwyn Avenue, Mountain Ash, CF45 4YE17, Pentwyn Avenue, Mountain Ash, CF45 4YE
• Sold Nov 2019£35,000 | 3 Bed House63, Pentwyn Avenue, Mountain Ash, CF45 4YE63, Pentwyn Avenue, Mountain Ash, CF45 4YE
• Sold Aug 2019£50,000 | 3 Bed House3, Pentwyn Avenue, Mountain Ash, CF45 4YE3, Pentwyn Avenue, Mountain Ash, CF45 4YE
• Sold Jul 2019£62,000 | 3 Bed House49, Pentwyn Avenue, Mountain Ash, CF45 4YE49, Pentwyn Avenue, Mountain Ash, CF45 4YE
• Sold Jun 2019£66,000 | 3 Bed House37, Pentwyn Avenue, Mountain Ash, CF45 4YE37, Pentwyn Avenue, Mountain Ash, CF45 4YE
• Sold Sep 2016£35,950 | 3 Bed House5, Pentwyn Avenue, Mountain Ash, CF45 4YE5, Pentwyn Avenue, Mountain Ash, CF45 4YE

Of the 111 addresses on Pentwyn Avenue, Mountain Ash, CF45, 9, Pentwyn Avenue, Mountain Ash comes out as the 76th largest and the 88th most expensive in our analysis of the public data.

It is also £80k less expensive than the average property across the CF45 district.

• Penrhiwceiber

  |

  1.0 km away
• Quakers Yard

  |

  2.2 km away
• Abercynon

  |

  2.7 km away

The flood risk here is rated Very Low, based on Environment Agency data.