HM Land Registry records the plot of land for 18, Copley Street, Mountain Ash as measuring 124 m².

That makes it the 3rd largest plot in the postcode, where 27 of the 28 other houses have recorded plot data.

18, Copley Street, Mountain Ash has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 19 Mar 2009.

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 18, Copley Street, Mountain Ash completed on 27th February 2004 at £88,000 and was recorded by HM Land Registry as a freehold house.

Since 1995 the property has sold 3 times.

• Sold Feb 2004£88,000
• Sold Sep 2003£71,000
• Sold Nov 1999£19,250

Since 2021 119 properties similar to 18, Copley Street, Mountain Ash have sold within a radius of 730 metres, per the Land Registry and our network of Estate Agents.

The latest, on the 8th May 2026, was 12, Beckett Street, Mountain Ash, CF45 4AW, a freehold house which sold for £150,000.

Read more about house prices in CF45.

• Sold May 2026£150,000 | 3 Bed House12, Beckett Street, Mountain Ash, CF45 4AW12, Beckett Street, Mountain Ash, CF45 4AW
• Sold Mar 2026£189,998 | 3 Bed House59, Allen Street, Mountain Ash, CF45 4BB59, Allen Street, Mountain Ash, CF45 4BB
• Sold Feb 2026£160,000 | 3 Bed House10, The Triangle, Mountain Ash, CF45 4BA10, The Triangle, Mountain Ash, CF45 4BA
• Sold Feb 2026£158,000 | 3 Bed House24, Richmond Road, Mountain Ash, CF45 4AN24, Richmond Road, Mountain Ash, CF45 4AN
• Sold Oct 2025£130,000 | 3 Bed House26, The Triangle, Mountain Ash, CF45 4BA26, The Triangle, Mountain Ash, CF45 4BA
• Sold Aug 2025£126,000 | 3 Bed House19, Beckett Street, Mountain Ash, CF45 4AW19, Beckett Street, Mountain Ash, CF45 4AW
• Sold Oct 2024£148,500 | 3 Bed House33, Phillip Street, Mountain Ash, CF45 4BE33, Phillip Street, Mountain Ash, CF45 4BE
• Sold May 2024£143,000 | 3 Bed House8, Copley Street, Mountain Ash, CF45 4AS8, Copley Street, Mountain Ash, CF45 4AS
• Sold Mar 2024£144,000 | 3 Bed House24, The Triangle, Mountain Ash, CF45 4BA24, The Triangle, Mountain Ash, CF45 4BA
• Sold Feb 2024£125,000 | 4 Bed House76, Phillip Street, Mountain Ash, CF45 4BG76, Phillip Street, Mountain Ash, CF45 4BG
• Sold Oct 2023£185,000 | 3 Bed House3, Richmond Road, Mountain Ash, CF45 4AN3, Richmond Road, Mountain Ash, CF45 4AN
• Sold Aug 2023£180,000 | 3 Bed House3, Beckett Street, Mountain Ash, CF45 4AW3, Beckett Street, Mountain Ash, CF45 4AW
• Sold Jul 2023£70,000 | 4 Bed House26, Copley Street, Mountain Ash, CF45 4AS26, Copley Street, Mountain Ash, CF45 4AS
• Sold Feb 2023£110,000 | 3 Bed House62, Arnold Street, Mountain Ash, CF45 4LF62, Arnold Street, Mountain Ash, CF45 4LF
• Sold Sep 2022£120,000 | 4 Bed House14, Phillip Street, Mountain Ash, CF45 4BE14, Phillip Street, Mountain Ash, CF45 4BE
• Sold Jun 2022£149,995 | 3 Bed House29, The Triangle, Mountain Ash, CF45 4BA29, The Triangle, Mountain Ash, CF45 4BA
• Sold Dec 2021£150,000 | 3 Bed House25, The Triangle, Mountain Ash, CF45 4BA25, The Triangle, Mountain Ash, CF45 4BA
• Sold Oct 2021£150,000 | 3 Bed House2, Richmond Road, Mountain Ash, CF45 4AN2, Richmond Road, Mountain Ash, CF45 4AN
• Sold Aug 2021£125,000 | 3 Bed House13, Richmond Road, Mountain Ash, CF45 4AN13, Richmond Road, Mountain Ash, CF45 4AN
• Sold Feb 2021£123,000 | 3 Bed House30, The Triangle, Mountain Ash, CF45 4BA30, The Triangle, Mountain Ash, CF45 4BA

Of the 28 addresses on Copley Street, Mountain Ash, CF45, 18, Copley Street, Mountain Ash comes out as the 3rd largest and the 3rd most expensive in our analysis of the public data.

It is also £3k less expensive than the average property across the CF45 district.

• Mountain Ash

  |

  600 m away
• Fernhill

  |

  1.3 km away
• Penrhiwceiber

  |

  2.2 km away

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