HM Land Registry records the plot of land for 13, Cwm Alarch, Mountain Ash as measuring 243 m².

That makes it the 10th largest plot in the postcode, where 14 of the 17 other houses have recorded plot data.

13, Cwm Alarch, Mountain Ash has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 04 Jun 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 13, Cwm Alarch, Mountain Ash completed on 9th October 2009 at £90,000 and was recorded by HM Land Registry as a freehold house.

Since 1995 the property has sold twice.

Values of comparable properties have risen by 183.2% over the period since October 2009.

• Sold Oct 2009£90,000
• Sold Apr 2001£49,500

Since 2007 35 properties similar to 13, Cwm Alarch, Mountain Ash have sold within a radius of 1.3 kilometres, per the Land Registry and our network of Estate Agents.

The latest, on the 27th February 2026, was 22, Forest View, Mountain Ash, CF45 3DU, a freehold house which sold for £124,000.

Read more about house prices in CF45.

• Sold Feb 2026£124,000 | 3 Bed House22, Forest View, Mountain Ash, CF45 3DU22, Forest View, Mountain Ash, CF45 3DU
• Sold Jul 2025£115,000 | 3 Bed House9, Cadwaladr Street, Mountain Ash, CF45 3RD9, Cadwaladr Street, Mountain Ash, CF45 3RD
• Sold Feb 2025£173,500 | 3 Bed House6, Forest View, Mountain Ash, CF45 3DU6, Forest View, Mountain Ash, CF45 3DU
• Sold Feb 2025£150,000 | 3 Bed House6, Glenboi, Mountain Ash, CF45 3DG6, Glenboi, Mountain Ash, CF45 3DG
• Sold Sep 2024£80,000 | 3 Bed House16, Cadwaladr Street, Mountain Ash, CF45 3RD16, Cadwaladr Street, Mountain Ash, CF45 3RD
• Sold Aug 2024£123,000 | 3 Bed House18, Forest View, Mountain Ash, CF45 3DU18, Forest View, Mountain Ash, CF45 3DU
• Sold Mar 2024£160,000 | 3 Bed House65, Forest View, Mountain Ash, CF45 3DU65, Forest View, Mountain Ash, CF45 3DU
• Sold Jan 2024£140,000 | 3 Bed House13, Sierra Pines, Mountain Ash, CF45 3DS13, Sierra Pines, Mountain Ash, CF45 3DS
• Sold Dec 2021£120,000 | 3 Bed House2, Sierra Pines, Mountain Ash, CF45 3DS2, Sierra Pines, Mountain Ash, CF45 3DS
• Sold Jun 2020£120,000 | 3 Bed House8, Sierra Pines, Mountain Ash, CF45 3DS8, Sierra Pines, Mountain Ash, CF45 3DS
• Sold Feb 2020£140,000 | 3 Bed House40, Forest View, Mountain Ash, CF45 3DU40, Forest View, Mountain Ash, CF45 3DU
• Sold Mar 2018£125,000 | 3 Bed House77, Forest View, Mountain Ash, CF45 3DU77, Forest View, Mountain Ash, CF45 3DU
• Sold Jul 2016£114,500 | 3 Bed House4, Sierra Pines, Mountain Ash, CF45 3DS4, Sierra Pines, Mountain Ash, CF45 3DS
• Sold Apr 2016£104,000 | 3 Bed House7, Meadow Close, Mountain Ash, CF45 3DN7, Meadow Close, Mountain Ash, CF45 3DN
• Sold Mar 2016£64,000 | 3 Bed House3, Sierra Pines, Mountain Ash, CF45 3DS3, Sierra Pines, Mountain Ash, CF45 3DS
• Sold Feb 2016£96,000 | 3 Bed House8, Boi Close, Mountain Ash, CF45 3DP8, Boi Close, Mountain Ash, CF45 3DP
• Sold Aug 2015£95,000 | 3 Bed House71, Forest View, Mountain Ash, CF45 3DU71, Forest View, Mountain Ash, CF45 3DU
• Sold Jan 2015£118,000 | 3 Bed House9, Sierra Pines, Mountain Ash, CF45 3DS9, Sierra Pines, Mountain Ash, CF45 3DS
• Sold Aug 2007£100,000 | 3 Bed House24, Forest View, Mountain Ash, CF45 3DU24, Forest View, Mountain Ash, CF45 3DU
• Sold Jan 2007£85,000 | 3 Bed House16, Cwm Alarch, Mountain Ash, CF45 3DR16, Cwm Alarch, Mountain Ash, CF45 3DR

Of the 17 addresses on Cwm Alarch, Mountain Ash, CF45, 13, Cwm Alarch, Mountain Ash comes out as the 13th largest and the 13th most expensive in our analysis of the public data.

It is also £6k less expensive than the average property across the CF45 district.

• Fernhill

  |

  400 m away
• Mountain Ash

  |

  1.5 km away
• Cwmbach

  |

  2.4 km away

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