8, William Street, Mountain Ash has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 20 Sep 2025.

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, 8, William Street, Mountain Ash was last sold on 19th December 2022 for £103,618 and was recorded as a freehold house.

The property has only had this single sale since 1995.

Since December 2022, the market for similar properties has risen by 8.8%.

• Sold Dec 2022£103,618

According to the Land Registry and our network of Estate Agents, there have been 292 sales of properties similar to 8, William Street, Mountain Ash within a radius of 1.3 kilometres over the last 2 years.

The most recent example is 23, William Street, Mountain Ash, CF45 4RW, a freehold house which sold for £155,000 on the 8th May 2025.

Read more about house prices in CF45.

• Sold May 2025£155,000 | 3 Bed House23, William Street, Mountain Ash, CF45 4RW23, William Street, Mountain Ash, CF45 4RW
• Sold Sep 2024£167,000 | 3 Bed House29, William Street, Mountain Ash, CF45 4RW29, William Street, Mountain Ash, CF45 4RW
• Sold Apr 2023£159,995 | 3 Bed House10, William Street, Mountain Ash, CF45 4RW10, William Street, Mountain Ash, CF45 4RW

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

William Street, Abercynon, Mountain Ash, CF45 has a total of 33 addresses. According to our analysis of all the public data, 8, William Street, Mountain Ash is the 8th largest and the 8th most expensive property on the street.

When compared to the postcode district it is £1k more expensive than the average property in CF45.

• Abercynon

  |

  200 m away
• Quakers Yard

  |

  1.9 km away
• Penrhiwceiber

  |

  3.6 km away

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