20, Commercial Street, Mountain Ash occupies a 47 m² plot as recorded by HM Land Registry.

Of the 14 other houses in this postcode, 12 have recorded plot sizes, and this one ranks as the 12th largest.

20, Commercial Street, Mountain Ash has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 02 Oct 2022.

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

20, Commercial Street, Mountain Ash last changed hands on 14th May 2025, selling for £67,000. The transaction was logged as a freehold house by HM Land Registry.

In total it has sold twice since 1995.

The market for similar properties has risen by 24.1% since May 2025.

Land Registry records and our Estate Agent network show 58 sales of comparable properties within 600 metres of 20, Commercial Street, Mountain Ash since 2016.

Most recently, 16, Commercial Street, Mountain Ash, CF45 3PS, a freehold house, sold at £122,000 on the 29th May 2026.

Read more about house prices in CF45.

• Sold May 2026£122,000 | 3 Bed House16, Commercial Street, Mountain Ash, CF45 3PS16, Commercial Street, Mountain Ash, CF45 3PS
• Sold May 2026£115,000 | 3 Bed House33, Dover Street, Mountain Ash, CF45 3HU33, Dover Street, Mountain Ash, CF45 3HU
• Sold Dec 2025£112,500 | 3 Bed House24, Pryce Street, Mountain Ash, CF45 3NT24, Pryce Street, Mountain Ash, CF45 3NT
• Sold Sep 2025£117,000 | 3 Bed House7A Quarry Cottages, Mountain Ash, CF45 3RN7A Quarry Cottages, Mountain Ash, CF45 3RN
• Sold Jul 2025£49,000 | 3 Bed House49, Commercial Street, Mountain Ash, CF45 3PS49, Commercial Street, Mountain Ash, CF45 3PS
• Sold Mar 2025£80,000 | 3 Bed House109, High Street, Mountain Ash, CF45 3LN109, High Street, Mountain Ash, CF45 3LN
• Sold Feb 2025£122,000 | 3 Bed House21, Darran Road, Mountain Ash, CF45 3HT21, Darran Road, Mountain Ash, CF45 3HT
• Sold Jan 2025£81,500 | 3 Bed House2, Cliff Street, Mountain Ash, CF45 3LE2, Cliff Street, Mountain Ash, CF45 3LE
• Sold Nov 2024£130,000 | 3 Bed House57, Woodland Street, Mountain Ash, CF45 3RE57, Woodland Street, Mountain Ash, CF45 3RE
• Sold Nov 2024£95,000 | 3 Bed House22, Commercial Street, Mountain Ash, CF45 3PS22, Commercial Street, Mountain Ash, CF45 3PS
• Sold Jul 2024£77,000 | 3 Bed House15, Lyle Street, Mountain Ash, CF45 3RG15, Lyle Street, Mountain Ash, CF45 3RG
• Sold Dec 2022£110,000 | 3 Bed House24, Lyle Street, Mountain Ash, CF45 3RG24, Lyle Street, Mountain Ash, CF45 3RG
• Sold May 2022£75,000 | 3 Bed House32, Woodland Street, Mountain Ash, CF45 3RR32, Woodland Street, Mountain Ash, CF45 3RR
• Sold Oct 2021£105,000 | 3 Bed House110, Woodland Street, Mountain Ash, CF45 3RB110, Woodland Street, Mountain Ash, CF45 3RB
• Sold Sep 2021£95,000 | 3 Bed House8, Lyle Street, Mountain Ash, CF45 3RG8, Lyle Street, Mountain Ash, CF45 3RG
• Sold Jun 2021£120,000 | 3 Bed House10, Duffryn Street, Mountain Ash, CF45 3NU10, 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 Oct 2017£70,000 | 3 Bed House2, Napier Street, Mountain Ash, CF45 3HW2, Napier Street, Mountain Ash, CF45 3HW
• Sold Aug 2017£75,000 | 3 Bed House12, Commercial Street, Mountain Ash, CF45 3PS12, Commercial Street, Mountain Ash, CF45 3PS
• Sold Jul 2016£71,500 | 3 Bed House1, Fountain Street, Mountain Ash, CF45 3PA1, Fountain Street, Mountain Ash, CF45 3PA

Our analysis of the public data ranks 20, Commercial Street, Mountain Ash as the 4th largest and the 3rd most expensive of the 31 addresses on Commercial Street, Mountain Ash, CF45.

Against the CF45 postcode district average, it is £46k less expensive than the typical property.

• Mountain Ash

  |

  500 m away
• Fernhill

  |

  1.0 km away
• Penrhiwceiber

  |

  2.2 km away

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