17, Walsh Street, Mountain Ash occupies a 106 m² plot as recorded by HM Land Registry.

Of the 39 other houses in this postcode, 35 have recorded plot sizes, and this one ranks as the 33rd largest.

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

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

17, Walsh Street, Mountain Ash last changed hands on 10th June 2016, selling for £68,500. The transaction was logged as a freehold house by HM Land Registry.

That is its only recorded sale since 1995.

The market for similar properties has risen by 163.0% since June 2016.

• Sold Jun 2016£68,500

Land Registry records and our Estate Agent network show 154 sales of comparable properties within 1.6 kilometres of 17, Walsh Street, Mountain Ash since 2009.

Most recently, 17, Homerton Street, Mountain Ash, CF45 4YP, a freehold house, sold at £95,000 on the 8th May 2026.

Read more about house prices in CF45.

• Sold May 2026£95,000 | 3 Bed House17, Homerton Street, Mountain Ash, CF45 4YP17, Homerton Street, Mountain Ash, CF45 4YP
• Sold Apr 2026£83,000 | 3 Bed House10, Pentwyn Avenue, Mountain Ash, CF45 4YF10, Pentwyn Avenue, Mountain Ash, CF45 4YF
• Sold Feb 2026£105,000 | 3 Bed House25, Walsh Street, Mountain Ash, CF45 4YS25, Walsh Street, Mountain Ash, CF45 4YS
• Sold Nov 2025£88,000 | 3 Bed House134, Bryntirion, Mountain Ash, CF45 4EX134, Bryntirion, Mountain Ash, CF45 4EX
• Sold Sep 2025£75,000 | 3 Bed House7, Walsh Street, Mountain Ash, CF45 4YS7, Walsh Street, Mountain Ash, CF45 4YS
• Sold Jun 2025£59,000 | 3 Bed House2, Walsh Street, Mountain Ash, CF45 4YS2, Walsh Street, Mountain Ash, CF45 4YS
• Sold May 2025£117,500 | 3 Bed House24, Pentwyn Avenue, Mountain Ash, CF45 4YF24, Pentwyn Avenue, Mountain Ash, CF45 4YF
• Sold Dec 2024£100,000 | 3 Bed House7, Halswell Street, Mountain Ash, CF45 4YN7, Halswell Street, Mountain Ash, CF45 4YN
• Sold Nov 2024£80,000 | 3 Bed House60, Pentwyn Avenue, Mountain Ash, CF45 4YF60, Pentwyn Avenue, Mountain Ash, CF45 4YF
• Sold Sep 2024£70,000 | 3 Bed House15, Milbourne Street, Mountain Ash, CF45 4YL15, Milbourne Street, Mountain Ash, CF45 4YL
• Sold Jun 2024£65,000 | 3 Bed House3, Homerton Street, Mountain Ash, CF45 4YP3, Homerton Street, Mountain Ash, CF45 4YP
• Sold Oct 2022£114,995 | 3 Bed House133, Bryntirion, Mountain Ash, CF45 4EX133, Bryntirion, Mountain Ash, CF45 4EX
• Sold Jan 2022£110,000 | 3 Bed House57, Avondale Street, Mountain Ash, CF45 4YY57, Avondale Street, Mountain Ash, CF45 4YY
• Sold Mar 2021£57,500 | 3 Bed House70, Bryntirion, Mountain Ash, CF45 4EX70, Bryntirion, Mountain Ash, CF45 4EX
• Sold Feb 2019£50,000 | 3 Bed House27, Walsh Street, Mountain Ash, CF45 4YS27, Walsh Street, Mountain Ash, CF45 4YS
• Sold Feb 2019£30,000 | 3 Bed House1, Pentwyn Avenue, Mountain Ash, CF45 4YE1, Pentwyn Avenue, Mountain Ash, CF45 4YE
• Sold Nov 2018£82,000 | 3 Bed House39, Walsh Street, Mountain Ash, CF45 4YS39, Walsh Street, Mountain Ash, CF45 4YS
• Sold Nov 2015£65,000 | 3 Bed House21, Walsh Street, Mountain Ash, CF45 4YS21, Walsh Street, Mountain Ash, CF45 4YS
• Sold Feb 2010£27,000 | 3 Bed House24, Walsh Street, Mountain Ash, CF45 4YS24, Walsh Street, Mountain Ash, CF45 4YS
• Sold Nov 2009£39,750 | 3 Bed House38, Walsh Street, Mountain Ash, CF45 4YS38, Walsh Street, Mountain Ash, CF45 4YS

Our analysis of the public data ranks 17, Walsh Street, Mountain Ash as the 11th largest and the 12th most expensive of the 39 addresses on Walsh Street, Mountain Ash, CF45.

Against the CF45 postcode district average, it is £59k less expensive than the typical property.

• Penrhiwceiber

  |

  1.3 km away
• Quakers Yard

  |

  1.7 km away
• Abercynon

  |

  2.3 km away

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