HM Land Registry records the plot of land for 13, Rock Street, Mountain Ash as measuring 96 m².

That makes it the 18th largest plot in the postcode, where 21 of the 23 other houses have recorded plot data.

13, Rock Street, Mountain Ash has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 22 Apr 2014.

The property is not connected to mains gas and has fully double glazed windows. It is heated using a boiler and radiators (mains gas).

The most recent sale of 13, Rock Street, Mountain Ash completed on 12th June 2014 at £90,000 and was recorded by HM Land Registry as a freehold house.

Since 1995 this is the property's only sale.

Values of comparable properties have risen by 121.2% over the period since June 2014.

• Sold Jun 2014£90,000

Since 2019 157 properties similar to 13, Rock Street, Mountain Ash have sold within a radius of 580 metres, per the Land Registry and our network of Estate Agents.

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

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 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 Mar 2024£119,000 | 3 Bed House45, Napier Street, Mountain Ash, CF45 3HW45, Napier Street, Mountain Ash, CF45 3HW
• 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 May 2022£75,000 | 3 Bed House75, Duffryn Street, Mountain Ash, CF45 3HR75, Duffryn Street, Mountain Ash, CF45 3HR
• Sold Mar 2022£85,000 | 3 Bed House8, Caradoc Street, Mountain Ash, CF45 3LB8, Caradoc Street, Mountain Ash, CF45 3LB
• 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

Of the 23 addresses on Rock Street, Mountain Ash, CF45, 13, Rock Street, Mountain Ash comes out as the 17th largest and the 16th most expensive in our analysis of the public data.

It is also £39k less expensive than the average property across the CF45 district.

• Mountain Ash

  |

  400 m away
• Fernhill

  |

  1.2 km away
• Penrhiwceiber

  |

  1.8 km away

The flood risk here is rated Very Low, based on Environment Agency data.