121, Pentwyn Avenue, Mountain Ash occupies a 153 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 29th largest.

121, Pentwyn Avenue, Mountain Ash has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 07 Nov 2017.

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

121, Pentwyn Avenue, Mountain Ash last changed hands on 21st September 2004, selling for £36,000. The transaction was logged as a freehold house by HM Land Registry.

That is its only recorded sale since 1995.

Land Registry records and our Estate Agent network show 43 sales of comparable properties within 1.3 kilometres of 121, Pentwyn Avenue, Mountain Ash since 2013.

Most recently, 15, Cross Street, Mountain Ash, CF45 4LR, a freehold house, sold at £64,000 on the 10th March 2026.

Read more about house prices in CF45.

• Sold Mar 2026£64,000 | 3 Bed House15, Cross Street, Mountain Ash, CF45 4LR15, Cross Street, Mountain Ash, CF45 4LR
• Sold Oct 2025£60,500 | 3 Bed House123, Pentwyn Avenue, Mountain Ash, CF45 4YE123, Pentwyn Avenue, Mountain Ash, CF45 4YE
• Sold Nov 2023£80,000 | 3 Bed House102, Bryntirion, Mountain Ash, CF45 4EX102, Bryntirion, Mountain Ash, CF45 4EX
• Sold Aug 2023£79,000 | 3 Bed House101, Pentwyn Avenue, Mountain Ash, CF45 4YE101, 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£61,000 | 3 Bed House2, Dilwyn Street, Mountain Ash, CF45 3YG2, Dilwyn Street, Mountain Ash, CF45 3YG
• Sold Mar 2022£65,000 | 3 Bed House15, Dilwyn Street, Mountain Ash, CF45 3YG15, Dilwyn Street, Mountain Ash, CF45 3YG
• Sold Aug 2021£74,995 | 3 Bed House3, Cross Street, Mountain Ash, CF45 4LR3, Cross Street, Mountain Ash, CF45 4LR
• Sold Jun 2021£60,000 | 3 Bed House17, Pentwyn Avenue, Mountain Ash, CF45 4YE17, Pentwyn Avenue, Mountain Ash, CF45 4YE
• Sold May 2020£66,500 | 3 Bed House20, Cross Street, Mountain Ash, CF45 4LR20, Cross Street, Mountain Ash, CF45 4LR
• 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 May 2019£39,999 | 3 Bed House111, Pentwyn Avenue, Mountain Ash, CF45 4YE111, Pentwyn Avenue, Mountain Ash, CF45 4YE
• Sold Jul 2018£26,000 | 3 Bed House26, Walsh Street, Mountain Ash, CF45 4YS26, Walsh Street, Mountain Ash, CF45 4YS
• Sold Sep 2017£39,999 | 3 Bed House35, Pentwyn Avenue, Mountain Ash, CF45 4YE35, Pentwyn Avenue, Mountain Ash, CF45 4YE
• Sold Jun 2017£47,000 | 3 Bed House113, Pentwyn Avenue, Mountain Ash, CF45 4YE113, 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
• Sold Apr 2015£47,000 | 3 Bed House3, Walsh Street, Mountain Ash, CF45 4YS3, Walsh Street, Mountain Ash, CF45 4YS
• Sold Aug 2014£45,000 | 3 Bed House45, Pentwyn Avenue, Mountain Ash, CF45 4YE45, Pentwyn Avenue, Mountain Ash, CF45 4YE
• Sold Nov 2013£21,000 | 3 Bed House53, Pentwyn Avenue, Mountain Ash, CF45 4YE53, Pentwyn Avenue, Mountain Ash, CF45 4YE

Our analysis of the public data ranks 121, Pentwyn Avenue, Mountain Ash as the 106th largest and the 110th most expensive of the 111 addresses on Pentwyn Avenue, Mountain Ash, CF45.

Against the CF45 postcode district average, it is £85k 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.