55, Clarence Street, Mountain Ash occupies a 142 m² plot as recorded by HM Land Registry.

Of the 66 other houses in this postcode, 60 have recorded plot sizes, and this one ranks as the 13th largest.

55, Clarence Street, Mountain Ash has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 06 May 2026.

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

55, Clarence Street, Mountain Ash last changed hands on 23rd November 2018, selling for £55,000. 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 98.9% since November 2018.

• Sold Nov 2018£55,000

Land Registry records and our Estate Agent network show 202 sales of comparable properties within 580 metres of 55, Clarence Street, Mountain Ash since 2018.

Most recently, 38, Albert Street, Mountain Ash, CF45 3BA, a freehold house, sold at £95,000 on the 30th July 2025.

Read more about house prices in CF45.

• Sold Jul 2025£95,000 | 3 Bed House38, Albert Street, Mountain Ash, CF45 3BA38, Albert Street, Mountain Ash, CF45 3BA
• Sold Jun 2025£90,000 | 3 Bed House26, Mount Pleasant Terrace, Mountain Ash, CF45 3AN26, Mount Pleasant Terrace, Mountain Ash, CF45 3AN
• Sold Jun 2025£66,000 | 3 Bed House40B, Glyngwyn Street, Mountain Ash, CF45 3AF40B, Glyngwyn Street, Mountain Ash, CF45 3AF
• Sold May 2025£103,000 | 3 Bed House15, Albany Street, Mountain Ash, CF45 3BE15, Albany Street, Mountain Ash, CF45 3BE
• Sold Apr 2025£72,000 | 3 Bed House16, Albert Street, Mountain Ash, CF45 3BA16, Albert Street, Mountain Ash, CF45 3BA
• Sold Mar 2025£110,000 | 3 Bed House36, Glyngwyn Street, Mountain Ash, CF45 3AF36, Glyngwyn Street, Mountain Ash, CF45 3AF
• Sold Nov 2024£85,000 | 3 Bed House3, Mount Pleasant Terrace, Mountain Ash, CF45 3AN3, Mount Pleasant Terrace, Mountain Ash, CF45 3AN
• Sold Jul 2024£105,000 | 3 Bed House14, Clarence Street, Mountain Ash, CF45 3BB14, Clarence Street, Mountain Ash, CF45 3BB
• Sold Jul 2024£75,000 | 3 Bed House12, Hughes Street, Mountain Ash, CF45 3UG12, Hughes Street, Mountain Ash, CF45 3UG
• Sold Sep 2023£120,000 | 3 Bed House9, Albert Street, Mountain Ash, CF45 3BA9, Albert Street, Mountain Ash, CF45 3BA
• Sold Sep 2023£85,000 | 3 Bed House58, Victoria Street, Mountain Ash, CF45 3AP58, Victoria Street, Mountain Ash, CF45 3AP
• Sold Jul 2023£118,000 | 3 Bed House25, Mount Pleasant Terrace, Mountain Ash, CF45 3AN25, Mount Pleasant Terrace, Mountain Ash, CF45 3AN
• Sold Oct 2022£82,500 | 3 Bed House15, Clarence Street, Mountain Ash, CF45 3BB15, Clarence Street, Mountain Ash, CF45 3BB
• Sold Oct 2022£110,000 | 3 Bed House12, Albert Street, Mountain Ash, CF45 3BA12, Albert Street, Mountain Ash, CF45 3BA
• Sold Oct 2022£72,500 | 3 Bed House53, Clarence Street, Mountain Ash, CF45 3BD53, Clarence Street, Mountain Ash, CF45 3BD
• Sold Aug 2022£108,000 | 3 Bed House56, Consort Street, Mountain Ash, CF45 3AU56, Consort Street, Mountain Ash, CF45 3AU
• Sold May 2022£100,000 | 3 Bed House47, Mount Pleasant Terrace, Mountain Ash, CF45 3AN47, Mount Pleasant Terrace, Mountain Ash, CF45 3AN
• Sold Jan 2021£75,000 | 3 Bed House42, Clarence Street, Mountain Ash, CF45 3BD42, Clarence Street, Mountain Ash, CF45 3BD
• Sold Nov 2019£43,000 | 3 Bed House71, Clarence Street, Mountain Ash, CF45 3BD71, Clarence Street, Mountain Ash, CF45 3BD
• Sold Nov 2018£86,000 | 3 Bed House25, Clarence Street, Mountain Ash, CF45 3BB25, Clarence Street, Mountain Ash, CF45 3BB

Our analysis of the public data ranks 55, Clarence Street, Mountain Ash as the 87th largest and the 92nd most expensive of the 102 addresses on Clarence Street, Mountain Ash, CF45.

Against the CF45 postcode district average, it is £53k less expensive than the typical property.

• Mountain Ash

  |

  700 m away
• Penrhiwceiber

  |

  1.2 km away
• Fernhill

  |

  1.9 km away

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