40, Duffryn Street, Mountain Ash occupies a 185 m² plot as recorded by HM Land Registry.

Of the 19 other houses in this postcode, 15 have recorded plot sizes, and this one ranks as the largest.

40, Duffryn Street, Mountain Ash has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 02 Oct 2013.

The property is not 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 264 sales of comparable properties within 510 metres of 40, Duffryn Street, Mountain Ash since 2019.

Most recently, 26, Woodland Terrace, Mountain Ash, CF45 3RF, a freehold house, sold at £130,000 on the 1st May 2026.

Read more about house prices in CF45.

• Sold May 2026£130,000 | 3 Bed House26, Woodland Terrace, Mountain Ash, CF45 3RF26, Woodland Terrace, Mountain Ash, CF45 3RF
• Sold Apr 2026£95,000 | 3 Bed House16, Lyle Street, Mountain Ash, CF45 3RG16, Lyle Street, Mountain Ash, CF45 3RG
• Sold Nov 2025£115,000 | 3 Bed House81, Duffryn Street, Mountain Ash, CF45 3HR81, Duffryn Street, Mountain Ash, CF45 3HR
• Sold Sep 2025£112,000 | 3 Bed House31, Napier Street, Mountain Ash, CF45 3HW31, Napier Street, Mountain Ash, CF45 3HW
• Sold Jul 2025£49,000 | 3 Bed House49, Commercial Street, Mountain Ash, CF45 3PS49, Commercial Street, Mountain Ash, CF45 3PS
• Sold Oct 2024£127,500 | 3 Bed House74, Duffryn Street, Mountain Ash, CF45 3HR74, Duffryn Street, Mountain Ash, CF45 3HR
• Sold Oct 2024£55,000 | 3 Bed House39, Dover Street, Mountain Ash, CF45 3HU39, Dover Street, Mountain Ash, CF45 3HU
• Sold Apr 2024£81,000 | 3 Bed House28, Duffryn Street, Mountain Ash, CF45 3NU28, Duffryn Street, Mountain Ash, CF45 3NU
• Sold Mar 2024£110,000 | 3 Bed House13, Lyle Street, Mountain Ash, CF45 3RG13, Lyle Street, Mountain Ash, CF45 3RG
• Sold Sep 2023£75,000 | 3 Bed House5, Duffryn Street, Mountain Ash, CF45 3NU5, Duffryn Street, Mountain Ash, CF45 3NU
• Sold Aug 2023£60,000 | 3 Bed House7, Cliff Street, Mountain Ash, CF45 3LE7, Cliff Street, Mountain Ash, CF45 3LE
• Sold Apr 2022£65,000 | 3 Bed House13, Duffryn Street, Mountain Ash, CF45 3NU13, Duffryn Street, Mountain Ash, CF45 3NU
• Sold Mar 2022£110,000 | 3 Bed House9, Duffryn Street, Mountain Ash, CF45 3NU9, Duffryn Street, Mountain Ash, CF45 3NU
• Sold Mar 2021£78,000 | 3 Bed House73, Duffryn Street, Mountain Ash, CF45 3HR73, Duffryn Street, Mountain Ash, CF45 3HR
• Sold Feb 2021£84,000 | 3 Bed House35, Duffryn Street, Mountain Ash, CF45 3NU35, Duffryn Street, Mountain Ash, CF45 3NU
• Sold Feb 2021£68,000 | 3 Bed House58, Duffryn Street, Mountain Ash, CF45 3HR58, Duffryn Street, Mountain Ash, CF45 3HR
• Sold Feb 2021£83,000 | 3 Bed House16, Duffryn Street, Mountain Ash, CF45 3NU16, Duffryn Street, Mountain Ash, CF45 3NU
• Sold Jan 2021£42,000 | 3 Bed House12, Oxford Street, Mountain Ash, CF45 3PL12, Oxford Street, Mountain Ash, CF45 3PL
• Sold Nov 2020£92,000 | 3 Bed House14, Lyle Street, Mountain Ash, CF45 3RG14, Lyle Street, Mountain Ash, CF45 3RG
• Sold Apr 2019£70,000 | 3 Bed House24, Duffryn Street, Mountain Ash, CF45 3NU24, Duffryn Street, Mountain Ash, CF45 3NU

Our analysis of the public data ranks 40, Duffryn Street, Mountain Ash as the 23rd largest and the 19th most expensive of the 93 addresses on Duffryn Street, Mountain Ash, CF45.

Against the CF45 postcode district average, it is £42k less expensive than the typical property.

• Mountain Ash

  |

  300 m away
• Fernhill

  |

  1.2 km away
• Penrhiwceiber

  |

  2.0 km away

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