HM Land Registry records the plot of land for 123, High Street, Mountain Ash as measuring 95 m².

That makes it the 28th largest plot in the postcode, where 37 of the 41 other houses have recorded plot data.

123, High Street, Mountain Ash has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 10 Sep 2020.

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

The most recent sale of 123, High Street, Mountain Ash completed on 11th December 2020 at £66,000 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 64.0% over the period since December 2020.

• Sold Dec 2020£66,000
• Sold Feb 2001£20,000

Since 2009 41 properties similar to 123, High Street, Mountain Ash have sold within a radius of 570 metres, per the Land Registry and our network of Estate Agents.

The latest, on the 2nd February 2026, was 32, High Street, Mountain Ash, CF45 3PE, a freehold house which sold for £53,000.

Read more about house prices in CF45.

• Sold Feb 2026£53,000 | 3 Bed House32, High Street, Mountain Ash, CF45 3PE32, High Street, Mountain Ash, CF45 3PE
• Sold Mar 2025£75,000 | 3 Bed House57, High Street, Mountain Ash, CF45 3PE57, High Street, Mountain Ash, CF45 3PE
• Sold Feb 2025£84,000 | 3 Bed House110, High Street, Mountain Ash, CF45 3LN110, High Street, Mountain Ash, CF45 3LN
• Sold Oct 2024£67,000 | 3 Bed House20, Chancery Lane, Mountain Ash, CF45 3NW20, Chancery Lane, Mountain Ash, CF45 3NW
• Sold Aug 2024£30,000 | 3 Bed House40, High Street, Mountain Ash, CF45 3PE40, High Street, Mountain Ash, CF45 3PE
• Sold Jul 2024£76,000 | 3 Bed House72, High Street, Mountain Ash, CF45 3LD72, High Street, Mountain Ash, CF45 3LD
• Sold Jun 2024£75,000 | 3 Bed House16, Stream Street, Mountain Ash, CF45 3LL16, Stream Street, Mountain Ash, CF45 3LL
• Sold Oct 2023£78,500 | 3 Bed House30, Napier Street, Mountain Ash, CF45 3HW30, Napier Street, Mountain Ash, CF45 3HW
• Sold May 2022£68,000 | 3 Bed House20, High Street, Mountain Ash, CF45 3PE20, High Street, Mountain Ash, CF45 3PE
• Sold Mar 2022£80,000 | 3 Bed House26, Stream Street, Mountain Ash, CF45 3LL26, Stream Street, Mountain Ash, CF45 3LL
• Sold Apr 2021£70,000 | 3 Bed House96, High Street, Mountain Ash, CF45 3LN96, High Street, Mountain Ash, CF45 3LN
• Sold Mar 2021£72,500 | 3 Bed House36, Napier Street, Mountain Ash, CF45 3HW36, Napier Street, Mountain Ash, CF45 3HW
• Sold Nov 2020£50,000 | 3 Bed House9, Ifor Street, Mountain Ash, CF45 3HN9, Ifor Street, Mountain Ash, CF45 3HN
• Sold Nov 2020£54,000 | 3 Bed House15, Stream Street, Mountain Ash, CF45 3LL15, Stream Street, Mountain Ash, CF45 3LL
• Sold Apr 2018£72,000 | 3 Bed House90, High Street, Mountain Ash, CF45 3LN90, High Street, Mountain Ash, CF45 3LN
• Sold Mar 2017£38,000 | 3 Bed House121, High Street, Mountain Ash, CF45 3LN121, High Street, Mountain Ash, CF45 3LN
• Sold Jun 2014£36,000 | 3 Bed House87, High Street, Mountain Ash, CF45 3LN87, High Street, Mountain Ash, CF45 3LN
• Sold Feb 2014£32,000 | 3 Bed House85, High Street, Mountain Ash, CF45 3LN85, High Street, Mountain Ash, CF45 3LN
• Sold Mar 2013£40,000 | 3 Bed House94, High Street, Mountain Ash, CF45 3LN94, High Street, Mountain Ash, CF45 3LN
• Sold Sep 2009£40,000 | 3 Bed House106, High Street, Mountain Ash, CF45 3LN106, High Street, Mountain Ash, CF45 3LN

Of the 135 addresses on High Street, Mountain Ash, CF45, 123, High Street, Mountain Ash comes out as the 66th largest and the 64th most expensive in our analysis of the public data.

It is also £79k less expensive than the average property across the CF45 district.

• Mountain Ash

  |

  300 m away
• Fernhill

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  1.3 km away
• Penrhiwceiber

  |

  1.8 km away

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