21, The Triangle, Mountain Ash has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 21 Aug 2019.

The property is connected to mains gas and has fully double glazed windows. It is heated using Boiler and radiators, mains gas.

According to HM Land Registry, 21, The Triangle, Mountain Ash was last sold on 7th January 2022 for £85,000 and was recorded as a freehold house.

The property has only had this single sale since 1995.

Since January 2022, the market for similar properties has risen by 14.6%.

• Sold Jan 2022£85,000

According to the Land Registry and our network of Estate Agents, there have been 153 sales of properties similar to 21, The Triangle, Mountain Ash within a radius of 890 metres over the last 2 years.

The most recent example is 26, The Triangle, Mountain Ash, CF45 4BA, a freehold house which sold for £130,000 on the 31st October 2025.

Read more about house prices in CF45.

• Sold Oct 2025£130,000 | 3 Bed House26, The Triangle, Mountain Ash, CF45 4BA26, The Triangle, Mountain Ash, CF45 4BA
• Sold Jul 2025£175,000 | 3 Bed House27, The Triangle, Mountain Ash, CF45 4BA27, The Triangle, Mountain Ash, CF45 4BA
• Sold Jun 2022£149,995 | 3 Bed House29, The Triangle, Mountain Ash, CF45 4BA29, The Triangle, Mountain Ash, CF45 4BA

•Nearby is defined as the radius comprising the nearest 2,000 addresses.

The Triangle, Mountain Ash, CF45 has a total of 41 addresses. According to our analysis of all the public data, 21, The Triangle, Mountain Ash is the 28th largest and the 27th most expensive property on the street.

When compared to the postcode district it is £7k less expensive than the average property in CF45.

• Mountain Ash

  |

  700 m away
• Fernhill

  |

  1.3 km away
• Penrhiwceiber

  |

  2.3 km away

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