According to data from HM Land Registry, 10, Duffryn Street, Mountain Ash sits on a plot of 139 m².

We have plot size data on 31 out of 35 other houses in the postcode and 10, Duffryn Street, Mountain Ash sits on the 2nd largest plot.

10, Duffryn Street, Mountain Ash has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 26 Jul 2020.

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

According to HM Land Registry, 10, Duffryn Street, Mountain Ash was last sold on 18th June 2021 for £120,000 and was recorded as a freehold house.

The property has had 2 sales since 1995.

Since June 2021, the market for similar properties has risen by 54.0%.

• Sold Jun 2021£120,000
• Sold Aug 2007£90,000

According to the Land Registry and our network of Estate Agents, there have been 129 sales of properties similar to 10, Duffryn Street, Mountain Ash within a radius of 540 metres since 2017.

The most recent example is 8, Woodland Terrace, Mountain Ash, CF45 3RF, a freehold house which sold for £95,000 on the 17th December 2025.

Read more about house prices in CF45.

• Sold Dec 2025£95,000 | 3 Bed House8, Woodland Terrace, Mountain Ash, CF45 3RF8, Woodland Terrace, Mountain Ash, CF45 3RF
• Sold Dec 2025£112,500 | 3 Bed House24, Pryce Street, Mountain Ash, CF45 3NT24, Pryce Street, Mountain Ash, CF45 3NT
• Sold Nov 2025£115,000 | 3 Bed House81, Duffryn Street, Mountain Ash, CF45 3HR81, Duffryn Street, Mountain Ash, CF45 3HR
• Sold Oct 2025£140,000 | 3 Bed House59, Arnold Street, Mountain Ash, CF45 4LF59, Arnold Street, Mountain Ash, CF45 4LF
• 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 Jun 2025£132,500 | 3 Bed House28, Kingcraft Street, Mountain Ash, CF45 3LT28, Kingcraft Street, Mountain Ash, CF45 3LT
• Sold May 2025£67,000 | 3 Bed House20, Commercial Street, Mountain Ash, CF45 3PS20, Commercial Street, Mountain Ash, CF45 3PS
• 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 Dec 2024£105,000 | 3 Bed House63, Woodland Street, Mountain Ash, CF45 3RE63, Woodland Street, Mountain Ash, CF45 3RE
• 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 Aug 2024£136,760 | 3 Bed House1, Lyle Street, Mountain Ash, CF45 3RG1, Lyle Street, Mountain Ash, CF45 3RG
• 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 Sep 2021£95,000 | 3 Bed House8, Lyle Street, Mountain Ash, CF45 3RG8, Lyle Street, Mountain Ash, CF45 3RG
• Sold Aug 2017£75,000 | 3 Bed House12, Commercial Street, Mountain Ash, CF45 3PS12, Commercial Street, Mountain Ash, CF45 3PS
• Sold Jan 2017£52,000 | 3 Bed House37, Duffryn Street, Mountain Ash, CF45 3NU37, Duffryn Street, Mountain Ash, CF45 3NU

Duffryn Street, Mountain Ash, CF45 has a total of 93 addresses. According to our analysis of all the public data, 10, Duffryn Street, Mountain Ash is the 4th largest and the 9th most expensive property on the street.

When compared to the postcode district it is £38k less expensive than the average property in CF45.

• Mountain Ash

  |

  400 m away
• Fernhill

  |

  1.1 km away
• Penrhiwceiber

  |

  2.1 km away

According to data from the Environment Agency, the flood risk in this area is considered to be Very Low.