42, Allen Street, Mountain Ash occupies a 91 m² plot as recorded by HM Land Registry.

Of the 31 other houses in this postcode, 25 have recorded plot sizes, and this one ranks as the 23rd largest.

42, Allen Street, Mountain Ash has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 25 Jun 2024.

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

42, Allen Street, Mountain Ash last changed hands on 22nd June 2007, selling for £92,500. The transaction was logged as a freehold house by HM Land Registry.

In total it has sold 3 times since 1995.

The market for similar properties has risen by 56.6% since June 2007.

• Sold Jun 2007£92,500
• Sold Oct 1999£28,000
• Sold Jun 1999£12,800

Land Registry records and our Estate Agent network show 111 sales of comparable properties within 670 metres of 42, Allen Street, Mountain Ash since 2019.

Most recently, 27, The Triangle, Mountain Ash, CF45 4BA, a freehold house, sold at £175,000 on the 18th July 2025.

Read more about house prices in CF45.

• Sold Jul 2025£175,000 | 3 Bed House27, The Triangle, Mountain Ash, CF45 4BA27, The Triangle, Mountain Ash, CF45 4BA
• Sold Oct 2024£80,000 | 3 Bed House18, Phillip Street, Mountain Ash, CF45 4BE18, Phillip Street, Mountain Ash, CF45 4BE
• Sold Jul 2024£140,000 | 3 Bed House26, Phillip Street, Mountain Ash, CF45 4BE26, Phillip Street, Mountain Ash, CF45 4BE
• Sold Jan 2024£105,000 | 3 Bed House12, Phillip Street, Mountain Ash, CF45 4BE12, Phillip Street, Mountain Ash, CF45 4BE
• Sold Aug 2023£115,000 | 3 Bed House47, Allen Street, Mountain Ash, CF45 4BB47, Allen Street, Mountain Ash, CF45 4BB
• Sold Jun 2023£117,500 | 3 Bed House21, Copley Street, Mountain Ash, CF45 4AS21, Copley Street, Mountain Ash, CF45 4AS
• Sold Aug 2022£90,000 | 3 Bed House37, Allen Street, Mountain Ash, CF45 4BB37, Allen Street, Mountain Ash, CF45 4BB
• Sold Jun 2022£129,995 | 3 Bed House4, Copley Street, Mountain Ash, CF45 4AS4, Copley Street, Mountain Ash, CF45 4AS
• Sold Jun 2022£125,000 | 3 Bed House45, Allen Street, Mountain Ash, CF45 4BB45, Allen Street, Mountain Ash, CF45 4BB
• Sold Mar 2022£115,000 | 3 Bed House56, Phillip Street, Mountain Ash, CF45 4BG56, Phillip Street, Mountain Ash, CF45 4BG
• Sold Feb 2022£85,000 | 3 Bed House44, Allen Street, Mountain Ash, CF45 4BB44, Allen Street, Mountain Ash, CF45 4BB
• Sold Feb 2022£127,000 | 3 Bed House14, Copley Street, Mountain Ash, CF45 4AS14, Copley Street, Mountain Ash, CF45 4AS
• Sold Mar 2021£65,000 | 3 Bed House23, Phillip Street, Mountain Ash, CF45 4BE23, Phillip Street, Mountain Ash, CF45 4BE
• Sold Aug 2020£210,000 | 3 Bed House9, Copley Street, Mountain Ash, CF45 4AS9, Copley Street, Mountain Ash, CF45 4AS
• Sold Apr 2020£77,000 | 3 Bed House19, Richmond Road, Mountain Ash, CF45 4AN19, Richmond Road, Mountain Ash, CF45 4AN
• Sold Jan 2020£111,000 | 3 Bed House11, Copley Street, Mountain Ash, CF45 4AS11, Copley Street, Mountain Ash, CF45 4AS
• Sold Nov 2019£62,000 | 3 Bed House36, Allen Street, Mountain Ash, CF45 4BB36, Allen Street, Mountain Ash, CF45 4BB
• Sold Sep 2019£137,000 | 3 Bed House49, Allen Street, Mountain Ash, CF45 4BB49, Allen Street, Mountain Ash, CF45 4BB
• Sold Jul 2019£90,000 | 3 Bed House27, Copley Street, Mountain Ash, CF45 4AS27, Copley Street, Mountain Ash, CF45 4AS
• Sold Jan 2019£112,500 | 3 Bed House58, Allen Street, Mountain Ash, CF45 4BB58, Allen Street, Mountain Ash, CF45 4BB

Our analysis of the public data ranks 42, Allen Street, Mountain Ash as the 41st largest and the 28th most expensive of the 63 addresses on Allen Street, Mountain Ash, CF45.

Against the CF45 postcode district average, it is £10k less expensive than the typical property.

• Mountain Ash

  |

  500 m away
• Fernhill

  |

  1.3 km away
• Penrhiwceiber

  |

  2.1 km away

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