According to data from HM Land Registry, 8, Rock Street, Mountain Ash sits on a plot of 86 m².

We have plot size data on 21 out of 23 other houses in the postcode and 8, Rock Street, Mountain Ash sits on the 20th largest plot.

8, Rock Street, Mountain Ash has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 22 Oct 2020.

The property is connected to mains gas and has mostly double glazing. It is heated using a boiler and radiators (mains gas).

According to the Land Registry and our network of Estate Agents, there have been 140 sales of properties similar to 8, Rock Street, Mountain Ash within a radius of 580 metres since 2019.

The most recent example is 29, Cliff Street, Mountain Ash, CF45 3LE, a freehold house which sold for £120,000 on the 14th November 2025.

Read more about house prices in CF45.

• Sold Nov 2025£120,000 | 3 Bed House29, Cliff Street, Mountain Ash, CF45 3LE29, Cliff Street, Mountain Ash, CF45 3LE
• Sold Jan 2025£225,000 | 3 Bed House115, High Street, Mountain Ash, CF45 3LN115, High Street, Mountain Ash, CF45 3LN
• Sold Nov 2024£61,000 | 3 Bed House15, Caradoc Street, Mountain Ash, CF45 3LB15, Caradoc Street, Mountain Ash, CF45 3LB
• Sold Nov 2024£100,000 | 3 Bed House21, Dover Street, Mountain Ash, CF45 3HU21, Dover Street, Mountain Ash, CF45 3HU
• Sold Oct 2024£127,500 | 3 Bed House74, Duffryn Street, Mountain Ash, CF45 3HR74, Duffryn Street, Mountain Ash, CF45 3HR
• Sold May 2024£112,000 | 3 Bed House7, Rock Street, Mountain Ash, CF45 3LP7, Rock Street, Mountain Ash, CF45 3LP
• Sold Apr 2024£37,000 | 3 Bed House38, Oxford Street, Mountain Ash, CF45 3HB38, Oxford Street, Mountain Ash, CF45 3HB
• Sold Dec 2023£56,500 | 3 Bed House58A, Duffryn Street, Mountain Ash, CF45 3HR58A, Duffryn Street, Mountain Ash, CF45 3HR
• Sold Nov 2023£109,000 | 3 Bed House77, Duffryn Street, Mountain Ash, CF45 3HR77, Duffryn Street, Mountain Ash, CF45 3HR
• Sold Sep 2023£74,950 | 3 Bed House13, Caradoc Street, Mountain Ash, CF45 3LB13, Caradoc Street, Mountain Ash, CF45 3LB
• Sold Aug 2023£60,000 | 3 Bed House7, Cliff Street, Mountain Ash, CF45 3LE7, Cliff Street, Mountain Ash, CF45 3LE
• Sold Jul 2023£85,000 | 3 Bed House82, Duffryn Street, Mountain Ash, CF45 3HR82, Duffryn Street, Mountain Ash, CF45 3HR
• Sold May 2023£112,000 | 3 Bed House1A, Dover Street, Mountain Ash, CF45 3HY1A, Dover Street, Mountain Ash, CF45 3HY
• Sold Feb 2023£95,000 | 3 Bed House14, Cliff Street, Mountain Ash, CF45 3LE14, Cliff Street, Mountain Ash, CF45 3LE
• Sold Nov 2022£85,000 | 3 Bed House72, Duffryn Street, Mountain Ash, CF45 3HR72, Duffryn Street, Mountain Ash, CF45 3HR
• Sold Jul 2022£55,000 | 3 Bed House32, Dover Street, Mountain Ash, CF45 3HU32, Dover Street, Mountain Ash, CF45 3HU
• Sold May 2022£75,000 | 3 Bed House75, Duffryn Street, Mountain Ash, CF45 3HR75, Duffryn Street, Mountain Ash, CF45 3HR
• Sold Mar 2022£55,000 | 3 Bed House1A, Cliff Street, Mountain Ash, CF45 3LE1A, Cliff Street, Mountain Ash, CF45 3LE
• Sold Oct 2021£77,000 | 3 Bed House37, Dover Street, Mountain Ash, CF45 3HU37, Dover Street, Mountain Ash, CF45 3HU
• Sold Jan 2019£79,500 | 3 Bed House20, Darran Road, Mountain Ash, CF45 3HT20, Darran Road, Mountain Ash, CF45 3HT

Rock Street, Mountain Ash, CF45 has a total of 23 addresses. According to our analysis of all the public data, 8, Rock Street, Mountain Ash is the 18th largest and the 17th most expensive property on the street.

When compared to the postcode district it is £41k less expensive than the average property in CF45.

• Mountain Ash

  |

  400 m away
• Fernhill

  |

  1.2 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.