According to data from HM Land Registry, 42, Duffryn Street, Mountain Ash sits on a plot of 178 m².

We have plot size data on 15 out of 19 other houses in the postcode and 42, Duffryn Street, Mountain Ash sits on the 3rd largest plot.

42, Duffryn Street, Mountain Ash has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 26 Jul 2013.

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, 42, Duffryn Street, Mountain Ash was last sold on 24th September 2014 for £70,000 and was recorded as a freehold house.

The property has only had this single sale since 1995.

Since September 2014, the market for similar properties has risen by 120.9%.

• Sold Sep 2014£70,000

According to the Land Registry and our network of Estate Agents, there have been 144 sales of properties similar to 42, Duffryn Street, Mountain Ash within a radius of 510 metres since 2021.

The most recent example is 13, Gorsedd Street, Mountain Ash, CF45 3LR, a freehold house which sold for £155,000 on the 31st March 2026.

Read more about house prices in CF45.

• Sold Mar 2026£155,000 | 3 Bed House13, Gorsedd Street, Mountain Ash, CF45 3LR13, Gorsedd Street, Mountain Ash, CF45 3LR
• Sold Feb 2026£142,500 | 3 Bed HouseAberpennar Cottage, Dover Street, Mountain Ash, CF45 3HYAberpennar Cottage, Dover Street, Mountain Ash, CF45 3HY
• Sold Dec 2025£140,000 | 3 Bed House19, Lyle Street, Mountain Ash, CF45 3RG19, Lyle Street, Mountain Ash, CF45 3RG
• Sold Dec 2025£112,500 | 3 Bed House24, Pryce Street, Mountain Ash, CF45 3NT24, Pryce Street, Mountain Ash, CF45 3NT
• 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 Nov 2024£120,000 | 3 Bed House3, Aberpennar Street, Mountain Ash, CF45 3LS3, Aberpennar Street, Mountain Ash, CF45 3LS
• Sold Aug 2024£136,760 | 3 Bed House1, Lyle Street, Mountain Ash, CF45 3RG1, Lyle Street, Mountain Ash, CF45 3RG
• Sold Aug 2024£105,000 | 3 Bed House43, Aberpennar Street, Mountain Ash, CF45 3LS43, Aberpennar Street, Mountain Ash, CF45 3LS
• Sold Jul 2024£77,000 | 3 Bed House15, Lyle Street, Mountain Ash, CF45 3RG15, Lyle Street, Mountain Ash, CF45 3RG
• Sold Apr 2024£110,000 | 3 Bed House47, Aberpennar Street, Mountain Ash, CF45 3LS47, Aberpennar Street, Mountain Ash, CF45 3LS
• Sold Mar 2024£114,000 | 3 Bed House46, Aberpennar Street, Mountain Ash, CF45 3LS46, Aberpennar Street, Mountain Ash, CF45 3LS
• Sold Mar 2023£148,000 | 3 Bed House1, Cadwaladr Street, Mountain Ash, CF45 3RD1, Cadwaladr Street, Mountain Ash, CF45 3RD
• Sold Nov 2022£120,000 | 3 Bed House8, Kingcraft Street, Mountain Ash, CF45 3LT8, Kingcraft Street, Mountain Ash, CF45 3LT
• Sold Oct 2022£130,000 | 3 Bed House16, Kingcraft Street, Mountain Ash, CF45 3LT16, Kingcraft Street, Mountain Ash, CF45 3LT
• 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

Duffryn Street, Mountain Ash, CF45 has a total of 93 addresses. According to our analysis of all the public data, 42, Duffryn Street, Mountain Ash is the 2nd largest and the 3rd most expensive property on the street.

When compared to the postcode district it is £26k less expensive than the average property in CF45.

• Mountain Ash

  |

  300 m away
• Fernhill

  |

  1.2 km away
• Penrhiwceiber

  |

  2.0 km away

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