HM Land Registry records the plot of land for 23, Rock Street, Mountain Ash as measuring 230 m².

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

23, Rock Street, Mountain Ash has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 07 Jul 2013.

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 23, Rock Street, Mountain Ash completed on 8th July 2016 at £76,000 and was recorded by HM Land Registry as a freehold house.

Since 1995 the property has sold twice.

Values of comparable properties have risen by 108.1% over the period since July 2016.

• Sold Jul 2016£76,000
• Sold Aug 2006£53,500

Since 2020 244 properties similar to 23, Rock Street, Mountain Ash have sold within a radius of 600 metres, per the Land Registry and our network of Estate Agents.

The latest, on the 31st March 2026, was 13, Gorsedd Street, Mountain Ash, CF45 3LR, a freehold house which sold for £155,000.

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 Nov 2025£150,000 | 3 Bed House29, Coplestone Street, Mountain Ash, CF45 3LY29, Coplestone Street, Mountain Ash, CF45 3LY
• 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 Jan 2025£81,500 | 3 Bed House2, Cliff Street, Mountain Ash, CF45 3LE2, Cliff Street, Mountain Ash, CF45 3LE
• 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 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 May 2022£137,500 | 3 Bed House19, Gorsedd Street, Mountain Ash, CF45 3LR19, Gorsedd Street, Mountain Ash, CF45 3LR
• Sold Dec 2021£121,500 | 3 Bed House12, Darran Road, Mountain Ash, CF45 3HT12, Darran Road, Mountain Ash, CF45 3HT
• Sold Jun 2021£129,000 | 3 Bed House36, Kingcraft Street, Mountain Ash, CF45 3LT36, Kingcraft Street, Mountain Ash, CF45 3LT
• Sold Dec 2020£97,500 | 3 Bed House30, Gorsedd Street, Mountain Ash, CF45 3LR30, 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 Feb 2020£80,500 | 3 Bed House28, Aberpennar Street, Mountain Ash, CF45 3LS28, Aberpennar Street, Mountain Ash, CF45 3LS

Of the 23 addresses on Rock Street, Mountain Ash, CF45, 23, Rock Street, Mountain Ash comes out as the 3rd largest and the 4th most expensive in our analysis of the public data.

It is also £19k 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.