According to data from HM Land Registry, 81, Duffryn Street, Mountain Ash sits on a plot of 96 m².

We have plot size data on 26 out of 31 other houses in the postcode and 81, Duffryn Street, Mountain Ash sits on the 22nd largest plot.

81, Duffryn Street, Mountain Ash has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 28 Jan 2025.

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, 81, Duffryn Street, Mountain Ash was last sold on 7th November 2025 for £115,000 and was recorded as a freehold house.

The property has had 2 sales since 1995.

Since November 2025, the market for similar properties has risen by 6.5%.

• Sold Nov 2025£115,000
• Sold Sep 2000£10,400

According to the Land Registry and our network of Estate Agents, there have been 269 sales of properties similar to 81, Duffryn Street, Mountain Ash within a radius of 510 metres since 2017.

The most recent example is 16, Lyle Street, Mountain Ash, CF45 3RG, a freehold house which sold for £95,000 on the 24th April 2026.

Read more about house prices in CF45.

• Sold Apr 2026£95,000 | 3 Bed House16, Lyle Street, Mountain Ash, CF45 3RG16, Lyle Street, Mountain Ash, CF45 3RG
• Sold Sep 2025£112,000 | 3 Bed House31, Napier Street, Mountain Ash, CF45 3HW31, Napier Street, Mountain Ash, CF45 3HW
• Sold Apr 2025£129,950 | 3 Bed House38, Kingcraft Street, Mountain Ash, CF45 3LT38, Kingcraft Street, Mountain Ash, CF45 3LT
• 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£85,000 | 3 Bed House55, Napier Street, Mountain Ash, CF45 3HW55, Napier Street, Mountain Ash, CF45 3HW
• Sold Oct 2024£55,000 | 3 Bed House39, Dover Street, Mountain Ash, CF45 3HU39, Dover Street, Mountain Ash, CF45 3HU
• Sold Jul 2024£126,000 | 3 Bed House45, Bailey Street, Mountain Ash, CF45 3AS45, Bailey Street, Mountain Ash, CF45 3AS
• Sold Mar 2024£119,000 | 3 Bed House45, Napier Street, Mountain Ash, CF45 3HW45, Napier Street, Mountain Ash, CF45 3HW
• Sold Oct 2023£88,500 | 3 Bed House54, Napier Street, Mountain Ash, CF45 3HW54, Napier Street, Mountain Ash, CF45 3HW
• Sold Jul 2023£85,000 | 3 Bed House82, Duffryn Street, Mountain Ash, CF45 3HR82, Duffryn Street, Mountain Ash, CF45 3HR
• Sold Apr 2023£80,000 | 3 Bed House12, Stream Street, Mountain Ash, CF45 3LL12, Stream Street, Mountain Ash, CF45 3LL
• Sold Jul 2022£87,500 | 3 Bed House35, Napier Street, Mountain Ash, CF45 3HW35, Napier Street, Mountain Ash, CF45 3HW
• Sold Dec 2021£121,500 | 3 Bed House12, Darran Road, Mountain Ash, CF45 3HT12, Darran Road, Mountain Ash, CF45 3HT
• Sold Mar 2021£78,000 | 3 Bed House73, Duffryn Street, Mountain Ash, CF45 3HR73, Duffryn Street, Mountain Ash, CF45 3HR
• Sold Feb 2021£68,000 | 3 Bed House58, Duffryn Street, Mountain Ash, CF45 3HR58, Duffryn Street, Mountain Ash, CF45 3HR
• Sold Dec 2019£40,600 | 3 Bed House79, Duffryn Street, Mountain Ash, CF45 3HR79, Duffryn Street, Mountain Ash, CF45 3HR
• Sold Dec 2019£40,000 | 3 Bed House33, Dover Street, Mountain Ash, CF45 3HU33, Dover Street, Mountain Ash, CF45 3HU
• Sold Feb 2019£66,000 | 3 Bed House15, Dover Street, Mountain Ash, CF45 3HU15, Dover Street, Mountain Ash, CF45 3HU
• Sold Aug 2017£48,000 | 3 Bed House28, Dover Street, Mountain Ash, CF45 3HU28, Dover Street, Mountain Ash, CF45 3HU

Duffryn Street, Mountain Ash, CF45 has a total of 93 addresses. According to our analysis of all the public data, 81, Duffryn Street, Mountain Ash is the 13th largest and the 12th 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

  |

  200 m away
• Fernhill

  |

  1.3 km away
• Penrhiwceiber

  |

  1.8 km away

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