17, Rock Street, Mountain Ash occupies a 96 m² plot as recorded by HM Land Registry.

Of the 23 other houses in this postcode, 21 have recorded plot sizes, and this one ranks as the 17th largest.

17, Rock Street, Mountain Ash has an Energy Performance Rating (EPC) of F. This is based on the most recent assessment, dated 24 Jul 2014.

The property is connected to mains gas and has fully double glazed windows. It is heated using a boiler and radiators (mains gas).

17, Rock Street, Mountain Ash last changed hands on 4th April 2002, selling for £27,000. The transaction was logged as a freehold house by HM Land Registry.

That is its only recorded sale since 1995.

• Sold Apr 2002£27,000

Land Registry records and our Estate Agent network show 182 sales of comparable properties within 590 metres of 17, Rock Street, Mountain Ash since 2019.

Most recently, 13, Gorsedd Street, Mountain Ash, CF45 3LR, a freehold house, sold at £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 Jun 2025£132,500 | 3 Bed House28, Kingcraft Street, Mountain Ash, CF45 3LT28, Kingcraft Street, Mountain Ash, CF45 3LT
• Sold Apr 2025£129,950 | 3 Bed House38, Kingcraft Street, Mountain Ash, CF45 3LT38, Kingcraft Street, Mountain Ash, CF45 3LT
• Sold Feb 2025£122,000 | 3 Bed House21, Darran Road, Mountain Ash, CF45 3HT21, Darran Road, Mountain Ash, CF45 3HT
• Sold Nov 2024£120,000 | 3 Bed House3, Aberpennar Street, Mountain Ash, CF45 3LS3, Aberpennar Street, Mountain Ash, CF45 3LS
• Sold Aug 2024£105,000 | 3 Bed House43, Aberpennar Street, Mountain Ash, CF45 3LS43, Aberpennar Street, Mountain Ash, CF45 3LS
• 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 Nov 2023£159,995 | 3 Bed House1, Gorsedd Street, Mountain Ash, CF45 3LR1, Gorsedd Street, Mountain Ash, CF45 3LR
• Sold Apr 2023£140,000 | 4 Bed House1, Aberpennar Street, Mountain Ash, CF45 3LS1, Aberpennar Street, Mountain Ash, CF45 3LS
• 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 Oct 2022£110,000 | 3 Bed House23, Gorsedd Street, Mountain Ash, CF45 3LR23, Gorsedd Street, Mountain Ash, CF45 3LR
• Sold Aug 2022£112,000 | 3 Bed House33, Gorsedd Street, Mountain Ash, CF45 3LR33, Gorsedd Street, Mountain Ash, CF45 3LR
• Sold May 2022£137,500 | 3 Bed House19, Gorsedd Street, Mountain Ash, CF45 3LR19, Gorsedd Street, Mountain Ash, CF45 3LR
• Sold Nov 2021£138,000 | 3 Bed House20, Gorsedd Street, Mountain Ash, CF45 3LR20, Gorsedd Street, Mountain Ash, CF45 3LR
• Sold Feb 2021£115,000 | 3 Bed House24, Gorsedd Street, Mountain Ash, CF45 3LR24, Gorsedd Street, Mountain Ash, CF45 3LR
• Sold Mar 2020£87,500 | 3 Bed House2, Aberpennar Street, Mountain Ash, CF45 3LS2, Aberpennar Street, Mountain Ash, CF45 3LS
• Sold Sep 2019£86,500 | 3 Bed House25, Gorsedd Street, Mountain Ash, CF45 3LR25, Gorsedd Street, Mountain Ash, CF45 3LR

Our analysis of the public data ranks 17, Rock Street, Mountain Ash as the largest and the most expensive of the 23 addresses on Rock Street, Mountain Ash, CF45.

Against the CF45 postcode district average, it is £15k less expensive than the typical property.

• Mountain Ash

  |

  400 m away
• Fernhill

  |

  1.2 km away
• Penrhiwceiber

  |

  1.8 km away

Environment Agency data suggests this area has a Very Low risk of flooding.