HM Land Registry records the plot of land for 20, Walsh Street, Mountain Ash as measuring 109 m².

That makes it the 16th largest plot in the postcode, where 35 of the 39 other houses have recorded plot data.

20, Walsh Street, Mountain Ash has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 31 Mar 2021.

The property is 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 20, Walsh Street, Mountain Ash completed on 19th June 1995 at £10,000 and was recorded by HM Land Registry as a freehold house.

Since 1995 this is the property's only sale.

• Sold Jun 1995£10,000

Since 2007 93 properties similar to 20, Walsh Street, Mountain Ash have sold within a radius of 1.6 kilometres, per the Land Registry and our network of Estate Agents.

The latest, on the 18th September 2025, was 7, Walsh Street, Mountain Ash, CF45 4YS, a freehold house which sold for £75,000.

Read more about house prices in CF45.

• Sold Sep 2025£75,000 | 3 Bed House7, Walsh Street, Mountain Ash, CF45 4YS7, Walsh Street, Mountain Ash, CF45 4YS
• Sold Aug 2025£83,000 | 3 Bed House90, Bryntirion, Mountain Ash, CF45 4EX90, Bryntirion, Mountain Ash, CF45 4EX
• Sold Jun 2025£59,000 | 3 Bed House2, Walsh Street, Mountain Ash, CF45 4YS2, Walsh Street, Mountain Ash, CF45 4YS
• Sold Mar 2024£58,000 | 3 Bed House58, Avondale Street, Mountain Ash, CF45 4YY58, Avondale Street, Mountain Ash, CF45 4YY
• Sold Nov 2023£80,000 | 3 Bed House102, Bryntirion, Mountain Ash, CF45 4EX102, Bryntirion, Mountain Ash, CF45 4EX
• Sold Jul 2022£105,000 | 3 Bed House13, Walsh Street, Mountain Ash, CF45 4YS13, Walsh Street, Mountain Ash, CF45 4YS
• Sold Apr 2022£67,500 | 3 Bed House40, Avondale Street, Mountain Ash, CF45 4YY40, Avondale Street, Mountain Ash, CF45 4YY
• Sold Aug 2021£74,995 | 3 Bed House3, Cross Street, Mountain Ash, CF45 4LR3, Cross Street, Mountain Ash, CF45 4LR
• Sold Dec 2019£39,999 | 3 Bed House45, Avondale Street, Mountain Ash, CF45 4YY45, Avondale Street, Mountain Ash, CF45 4YY
• Sold Jul 2018£26,000 | 3 Bed House26, Walsh Street, Mountain Ash, CF45 4YS26, Walsh Street, Mountain Ash, CF45 4YS
• Sold May 2018£81,500 | 3 Bed House60, Avondale Street, Mountain Ash, CF45 4YY60, Avondale Street, Mountain Ash, CF45 4YY
• Sold Apr 2017£63,500 | 3 Bed House4, Bagot Street, Mountain Ash, CF45 4YW4, Bagot Street, Mountain Ash, CF45 4YW
• Sold Mar 2016£57,500 | 3 Bed House51, Avondale Street, Mountain Ash, CF45 4YY51, Avondale Street, Mountain Ash, CF45 4YY
• Sold Dec 2015£18,000 | 3 Bed House6, Walsh Street, Mountain Ash, CF45 4YS6, Walsh Street, Mountain Ash, CF45 4YS
• Sold Jun 2015£38,000 | 3 Bed House9, Bagot Street, Mountain Ash, CF45 4YW9, Bagot Street, Mountain Ash, CF45 4YW
• Sold Apr 2015£47,000 | 3 Bed House3, Walsh Street, Mountain Ash, CF45 4YS3, Walsh Street, Mountain Ash, CF45 4YS
• Sold May 2014£40,000 | 3 Bed House4, Walsh Street, Mountain Ash, CF45 4YS4, Walsh Street, Mountain Ash, CF45 4YS
• Sold Jul 2013£55,000 | 3 Bed House35, Walsh Street, Mountain Ash, CF45 4YS35, Walsh Street, Mountain Ash, CF45 4YS
• Sold Mar 2009£65,000 | 3 Bed House10, Walsh Street, Mountain Ash, CF45 4YS10, Walsh Street, Mountain Ash, CF45 4YS
• Sold Nov 2007£81,500 | 3 Bed House5, Walsh Street, Mountain Ash, CF45 4YS5, Walsh Street, Mountain Ash, CF45 4YS

Of the 39 addresses on Walsh Street, Mountain Ash, CF45, 20, Walsh Street, Mountain Ash comes out as the 36th largest and the 37th most expensive in our analysis of the public data.

It is also £72k less expensive than the average property across the CF45 district.

• Penrhiwceiber

  |

  1.3 km away
• Quakers Yard

  |

  1.7 km away
• Abercynon

  |

  2.3 km away

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