HM Land Registry records the plot of land for 11, Cwm Alarch, Mountain Ash as measuring 424 m².

That makes it the 8th largest plot in the postcode, where 14 of the 17 other houses have recorded plot data.

11, Cwm Alarch, Mountain Ash has an Energy Performance Rating (EPC) of B. This is based on the most recent assessment, dated 23 Sep 2023.

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

Since 2007 34 properties similar to 11, Cwm Alarch, Mountain Ash have sold within a radius of 1.2 kilometres, per the Land Registry and our network of Estate Agents.

The latest, on the 21st November 2025, was 8, Meadow Close, Mountain Ash, CF45 3DN, a freehold house which sold for £200,000.

Read more about house prices in CF45.

• Sold Nov 2025£200,000 | 3 Bed House8, Meadow Close, Mountain Ash, CF45 3DN8, Meadow Close, Mountain Ash, CF45 3DN
• Sold Jul 2025£220,000 | 4 Bed HouseGreenala, Heol Penrhiw, Mountain Ash, CF45 4DSGreenala, Heol Penrhiw, Mountain Ash, CF45 4DS
• Sold Jul 2025£169,950 | 3 Bed House39, Forest View, Mountain Ash, CF45 3DU39, Forest View, Mountain Ash, CF45 3DU
• Sold Jul 2025£225,000 | 3 Bed House32, Forest View, Mountain Ash, CF45 3DU32, Forest View, Mountain Ash, CF45 3DU
• Sold Aug 2024£200,000 | 4 Bed House9, Harcourt Road, Mountain Ash, CF45 3PY9, Harcourt Road, Mountain Ash, CF45 3PY
• Sold May 2024£220,000 | 3 Bed HouseTy Newydd, Middle Row, Mountain Ash, CF45 4DNTy Newydd, Middle Row, Mountain Ash, CF45 4DN
• Sold Jan 2024£225,000 | 3 Bed House18, Glenbrook, Mountain Ash, CF45 3DH18, Glenbrook, Mountain Ash, CF45 3DH
• Sold Oct 2023£225,000 | 4 Bed House58, Forest View, Mountain Ash, CF45 3DU58, Forest View, Mountain Ash, CF45 3DU
• Sold Feb 2023£190,000 | 3 Bed House21, Forest View, Mountain Ash, CF45 3DU21, Forest View, Mountain Ash, CF45 3DU
• Sold Dec 2022£180,000 | 3 Bed House8, Glenbrook, Mountain Ash, CF45 3DH8, Glenbrook, Mountain Ash, CF45 3DH
• Sold Jan 2022£230,000 | 3 Bed House20, Forest View, Mountain Ash, CF45 3DU20, Forest View, Mountain Ash, CF45 3DU
• Sold Oct 2021£165,000 | 3 Bed House3, Glenbrook, Mountain Ash, CF45 3DH3, Glenbrook, Mountain Ash, CF45 3DH
• Sold Apr 2021£185,000 | 3 Bed House2, Forest View, Mountain Ash, CF45 3DU2, Forest View, Mountain Ash, CF45 3DU
• Sold Jun 2016£124,950 | 3 Bed House67, Forest View, Mountain Ash, CF45 3DU67, Forest View, Mountain Ash, CF45 3DU
• Sold Apr 2016£125,000 | 3 Bed House6, Cwm Alarch, Mountain Ash, CF45 3DR6, Cwm Alarch, Mountain Ash, CF45 3DR
• Sold Mar 2016£127,000 | 3 Bed House6, Glenbrook, Mountain Ash, CF45 3DH6, Glenbrook, Mountain Ash, CF45 3DH
• Sold Aug 2013£91,000 | 3 Bed House27, Forest View, Mountain Ash, CF45 3DU27, Forest View, Mountain Ash, CF45 3DU
• Sold May 2013£145,000 | 4 Bed House12, Cwm Alarch, Mountain Ash, CF45 3DR12, Cwm Alarch, Mountain Ash, CF45 3DR
• Sold Sep 2007£124,510 | 3 Bed House15, Boi Close, Mountain Ash, CF45 3DP15, Boi Close, Mountain Ash, CF45 3DP
• Sold Feb 2007£125,000 | 3 Bed House8, Forest View, Mountain Ash, CF45 3DU8, Forest View, Mountain Ash, CF45 3DU

Of the 17 addresses on Cwm Alarch, Mountain Ash, CF45, 11, Cwm Alarch, Mountain Ash comes out as the 7th largest and the 7th most expensive in our analysis of the public data.

It is also £57k more 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.