21, Pentwyn Avenue, Mountain Ash occupies a 168 m² plot as recorded by HM Land Registry.

Of the 66 other houses in this postcode, 63 have recorded plot sizes, and this one ranks as the 5th largest.

21, Pentwyn Avenue, Mountain Ash has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 06 Sep 2022.

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 53 sales of comparable properties within 1.4 kilometres of 21, Pentwyn Avenue, Mountain Ash since 2015.

Most recently, 206, Bryntirion, Mountain Ash, CF45 4EJ, a freehold house, sold at £80,000 on the 12th June 2026.

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 May 2026£95,000 | 3 Bed House17, Homerton Street, Mountain Ash, CF45 4YP17, Homerton Street, Mountain Ash, CF45 4YP
• Sold Nov 2025£88,000 | 3 Bed House134, Bryntirion, Mountain Ash, CF45 4EX134, Bryntirion, Mountain Ash, CF45 4EX
• Sold Jun 2024£65,000 | 3 Bed House3, Homerton Street, Mountain Ash, CF45 4YP3, Homerton Street, Mountain Ash, CF45 4YP
• Sold Jan 2024£70,000 | 3 Bed House41, Pentwyn Avenue, Mountain Ash, CF45 4YE41, Pentwyn Avenue, Mountain Ash, CF45 4YE
• Sold Oct 2023£65,000 | 3 Bed House103, Pentwyn Avenue, Mountain Ash, CF45 4YE103, Pentwyn Avenue, Mountain Ash, CF45 4YE
• Sold Jun 2023£165,000 | 3 Bed House59, Pentwyn Avenue, Mountain Ash, CF45 4YE59, Pentwyn Avenue, Mountain Ash, CF45 4YE
• Sold Mar 2023£90,000 | 3 Bed House131, Pentwyn Avenue, Mountain Ash, CF45 4YE131, Pentwyn Avenue, Mountain Ash, CF45 4YE
• Sold Oct 2022£114,995 | 3 Bed House133, Bryntirion, Mountain Ash, CF45 4EX133, Bryntirion, Mountain Ash, CF45 4EX
• Sold Mar 2021£57,500 | 3 Bed House70, Bryntirion, Mountain Ash, CF45 4EX70, Bryntirion, Mountain Ash, CF45 4EX
• Sold May 2020£44,000 | 3 Bed House99, Pentwyn Avenue, Mountain Ash, CF45 4YE99, Pentwyn Avenue, Mountain Ash, CF45 4YE
• Sold Mar 2020£40,000 | 3 Bed House105, Bryntirion, Mountain Ash, CF45 4EX105, Bryntirion, Mountain Ash, CF45 4EX
• Sold Dec 2019£60,000 | 3 Bed House89, Pentwyn Avenue, Mountain Ash, CF45 4YE89, 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£72,000 | 3 Bed House131, Bryntirion, Mountain Ash, CF45 4EX131, Bryntirion, Mountain Ash, CF45 4EX
• Sold Aug 2019£50,000 | 3 Bed House3, Pentwyn Avenue, Mountain Ash, CF45 4YE3, Pentwyn Avenue, Mountain Ash, CF45 4YE
• Sold Aug 2019£39,995 | 3 Bed House154, Bryntirion, Mountain Ash, CF45 4PJ154, Bryntirion, Mountain Ash, CF45 4PJ
• Sold Feb 2019£30,000 | 3 Bed House1, Pentwyn Avenue, Mountain Ash, CF45 4YE1, Pentwyn Avenue, Mountain Ash, CF45 4YE
• Sold Jul 2018£48,000 | 3 Bed House113, Bryntirion, Mountain Ash, CF45 4EX113, Bryntirion, Mountain Ash, CF45 4EX
• Sold Jun 2015£36,000 | 3 Bed House43, Pentwyn Avenue, Mountain Ash, CF45 4YE43, Pentwyn Avenue, Mountain Ash, CF45 4YE

Our analysis of the public data ranks 21, Pentwyn Avenue, Mountain Ash as the 19th largest and the 56th most expensive of the 111 addresses on Pentwyn Avenue, Mountain Ash, CF45.

Against the CF45 postcode district average, it is £72k less expensive than the typical property.

• Penrhiwceiber

  |

  1.0 km away
• Quakers Yard

  |

  2.2 km away
• Abercynon

  |

  2.7 km away

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