HM Land Registry records the plot of land for 4, Cwm Alarch, Mountain Ash as measuring 388 m².

That makes it the 9th largest plot in the postcode, where 14 of the 17 other houses have recorded plot data.

4, Cwm Alarch, Mountain Ash has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 10 Aug 2021.

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 4, Cwm Alarch, Mountain Ash completed on 10th December 2021 at £180,000 and was recorded by HM Land Registry as a freehold house.

Since 1995 this is the property's only sale.

Values of comparable properties have risen by 84.5% over the period since December 2021.

• Sold Dec 2021£180,000

Since 2007 33 properties similar to 4, 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 17th July 2025, was 39, Forest View, Mountain Ash, CF45 3DU, a freehold house which sold for £169,950.

Read more about house prices in CF45.

• Sold Jul 2025£169,950 | 3 Bed House39, Forest View, Mountain Ash, CF45 3DU39, 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 Feb 2023£190,000 | 3 Bed House21, Forest View, Mountain Ash, CF45 3DU21, Forest View, Mountain Ash, CF45 3DU
• Sold Jan 2023£190,000 | 3 Bed House74, Forest View, Mountain Ash, CF45 3DU74, Forest View, Mountain Ash, CF45 3DU
• Sold Jul 2022£230,000 | 3 Bed House75, Forest View, Mountain Ash, CF45 3DU75, Forest View, Mountain Ash, CF45 3DU
• Sold Jul 2022£200,000 | 3 Bed House24, Trem Y Dyffryn, Mountain Ash, CF45 4AQ24, Trem Y Dyffryn, Mountain Ash, CF45 4AQ
• Sold May 2022£275,000 | 3 Bed House79, Forest View, Mountain Ash, CF45 3DU79, Forest View, Mountain Ash, CF45 3DU
• Sold Dec 2021£210,000 | 3 Bed House31, Forest View, Mountain Ash, CF45 3DU31, Forest View, Mountain Ash, CF45 3DU
• Sold Sep 2021£160,000 | 3 Bed House9, Cwm Alarch, Mountain Ash, CF45 3DR9, Cwm Alarch, Mountain Ash, CF45 3DR
• Sold Mar 2021£165,000 | 3 Bed House4, Cwm Alarch Close, Mountain Ash, CF45 3DT4, Cwm Alarch Close, Mountain Ash, CF45 3DT
• Sold Mar 2020£130,000 | 3 Bed House17, Glenbrook, Mountain Ash, CF45 3DH17, Glenbrook, Mountain Ash, CF45 3DH
• Sold Feb 2020£140,000 | 3 Bed House40, Forest View, Mountain Ash, CF45 3DU40, Forest View, Mountain Ash, CF45 3DU
• Sold Jul 2019£131,000 | 3 Bed House16, Boi Close, Mountain Ash, CF45 3DP16, Boi Close, Mountain Ash, CF45 3DP
• Sold May 2019£104,500 | 3 Bed House14, Glenbrook, Mountain Ash, CF45 3DH14, Glenbrook, Mountain Ash, CF45 3DH
• Sold Apr 2019£123,000 | 3 Bed House61, Forest View, Mountain Ash, CF45 3DU61, Forest View, Mountain Ash, CF45 3DU
• Sold Mar 2018£134,995 | 3 Bed House64, Forest View, Mountain Ash, CF45 3DU64, Forest View, Mountain Ash, CF45 3DU
• Sold Sep 2016£115,000 | 3 Bed House11, Glenbrook, Mountain Ash, CF45 3DH11, Glenbrook, Mountain Ash, CF45 3DH
• Sold Aug 2014£103,000 | 3 Bed House9, Forest View, Mountain Ash, CF45 3DU9, Forest View, Mountain Ash, CF45 3DU
• Sold Feb 2010£92,000 | 3 Bed House25, Forest View, Mountain Ash, CF45 3DU25, Forest View, Mountain Ash, CF45 3DU
• Sold Oct 2007£129,000 | 3 Bed House69, Forest View, Mountain Ash, CF45 3DU69, Forest View, Mountain Ash, CF45 3DU

Of the 17 addresses on Cwm Alarch, Mountain Ash, CF45, 4, Cwm Alarch, Mountain Ash comes out as the 10th largest and the 10th most expensive in our analysis of the public data.

It is also £40k more expensive than the average property across the CF45 district.

• Fernhill

  |

  400 m away
• Mountain Ash

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  1.5 km away
• Cwmbach

  |

  2.4 km away

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