HM Land Registry records the plot of land for 18, Clarence Street, Mountain Ash as measuring 136 m².

That makes it the 21st largest plot in the postcode, where 32 of the 36 other houses have recorded plot data.

18, Clarence Street, Mountain Ash has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 05 Jan 2024.

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

Since 2018 180 properties similar to 18, Clarence 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 30th July 2025, was 38, Albert Street, Mountain Ash, CF45 3BA, a freehold house which sold for £95,000.

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£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 May 2025£119,000 | 3 Bed House74, Victoria Street, Mountain Ash, CF45 3AP74, Victoria Street, Mountain Ash, CF45 3AP
• 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 May 2024£62,000 | 3 Bed House89, Victoria Street, Mountain Ash, CF45 3AP89, Victoria Street, Mountain Ash, CF45 3AP
• 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 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 Aug 2022£108,000 | 3 Bed House56, Consort Street, Mountain Ash, CF45 3AU56, Consort Street, Mountain Ash, CF45 3AU
• Sold Aug 2021£103,000 | 3 Bed House12, Clarence Street, Mountain Ash, CF45 3BB12, Clarence Street, Mountain Ash, CF45 3BB
• Sold Jul 2021£70,000 | 3 Bed House53, Victoria Street, Mountain Ash, CF45 3AP53, Victoria Street, Mountain Ash, CF45 3AP
• Sold Mar 2021£91,950 | 3 Bed House8, Clarence Street, Mountain Ash, CF45 3BB8, Clarence Street, Mountain Ash, CF45 3BB
• Sold Jan 2021£75,000 | 3 Bed House42, Clarence Street, Mountain Ash, CF45 3BD42, Clarence Street, Mountain Ash, CF45 3BD
• Sold Apr 2019£58,000 | 3 Bed House33, Clarence Street, Mountain Ash, CF45 3BB33, Clarence Street, Mountain Ash, CF45 3BB
• Sold Nov 2018£86,000 | 3 Bed House25, Clarence Street, Mountain Ash, CF45 3BB25, Clarence Street, Mountain Ash, CF45 3BB

Of the 102 addresses on Clarence Street, Mountain Ash, CF45, 18, Clarence Street, Mountain Ash comes out as the 92nd largest and the 94th most expensive in our analysis of the public data.

It is also £54k less expensive than the average property across the CF45 district.

• Mountain Ash

  |

  600 m away
• Penrhiwceiber

  |

  1.3 km away
• Fernhill

  |

  1.8 km away

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