HM Land Registry records the plot of land for 37, Allen Street, Mountain Ash as measuring 95 m².

That makes it the 19th largest plot in the postcode, where 25 of the 31 other houses have recorded plot data.

37, Allen Street, Mountain Ash has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 21 Jul 2022.

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 37, Allen Street, Mountain Ash completed on 22nd August 2022 at £90,000 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 5.4% over the period since August 2022.

• Sold Aug 2022£90,000

Since 2019 93 properties similar to 37, Allen Street, Mountain Ash have sold within a radius of 660 metres, per the Land Registry and our network of Estate Agents.

The latest, on the 18th July 2025, was 27, The Triangle, Mountain Ash, CF45 4BA, a freehold house which sold for £175,000.

Read more about house prices in CF45.

• Sold Jul 2025£175,000 | 3 Bed House27, The Triangle, Mountain Ash, CF45 4BA27, The Triangle, Mountain Ash, CF45 4BA
• Sold Oct 2024£80,000 | 3 Bed House18, Phillip Street, Mountain Ash, CF45 4BE18, Phillip Street, Mountain Ash, CF45 4BE
• Sold Sep 2024£85,000 | 3 Bed House42, Allen Street, Mountain Ash, CF45 4BB42, Allen Street, Mountain Ash, CF45 4BB
• Sold Jul 2024£140,000 | 3 Bed House26, Phillip Street, Mountain Ash, CF45 4BE26, Phillip Street, Mountain Ash, CF45 4BE
• Sold Jan 2024£105,000 | 3 Bed House12, Phillip Street, Mountain Ash, CF45 4BE12, Phillip Street, Mountain Ash, CF45 4BE
• Sold Oct 2023£125,100 | 3 Bed House21, Phillip Street, Mountain Ash, CF45 4BE21, Phillip Street, Mountain Ash, CF45 4BE
• Sold Aug 2023£115,000 | 3 Bed House47, Allen Street, Mountain Ash, CF45 4BB47, Allen Street, Mountain Ash, CF45 4BB
• Sold Jun 2023£117,500 | 3 Bed House21, Copley Street, Mountain Ash, CF45 4AS21, Copley Street, Mountain Ash, CF45 4AS
• Sold Jun 2022£129,995 | 3 Bed House4, Copley Street, Mountain Ash, CF45 4AS4, Copley Street, Mountain Ash, CF45 4AS
• Sold Jun 2022£125,000 | 3 Bed House45, Allen Street, Mountain Ash, CF45 4BB45, Allen Street, Mountain Ash, CF45 4BB
• Sold May 2022£92,500 | 3 Bed House16, Copley Street, Mountain Ash, CF45 4AS16, Copley Street, Mountain Ash, CF45 4AS
• Sold Feb 2022£85,000 | 3 Bed House44, Allen Street, Mountain Ash, CF45 4BB44, Allen Street, Mountain Ash, CF45 4BB
• Sold Feb 2022£127,000 | 3 Bed House14, Copley Street, Mountain Ash, CF45 4AS14, Copley Street, Mountain Ash, CF45 4AS
• Sold Mar 2021£65,000 | 3 Bed House23, Phillip Street, Mountain Ash, CF45 4BE23, Phillip Street, Mountain Ash, CF45 4BE
• Sold Aug 2020£210,000 | 3 Bed House9, Copley Street, Mountain Ash, CF45 4AS9, Copley Street, Mountain Ash, CF45 4AS
• Sold Aug 2020£72,000 | 3 Bed House58, Phillip Street, Mountain Ash, CF45 4BG58, Phillip Street, Mountain Ash, CF45 4BG
• Sold Apr 2020£77,000 | 3 Bed House19, Richmond Road, Mountain Ash, CF45 4AN19, Richmond Road, Mountain Ash, CF45 4AN
• Sold Jan 2020£111,000 | 3 Bed House11, Copley Street, Mountain Ash, CF45 4AS11, Copley Street, Mountain Ash, CF45 4AS
• Sold Nov 2019£62,000 | 3 Bed House36, Allen Street, Mountain Ash, CF45 4BB36, Allen Street, Mountain Ash, CF45 4BB
• Sold Sep 2019£137,000 | 3 Bed House49, Allen Street, Mountain Ash, CF45 4BB49, Allen Street, Mountain Ash, CF45 4BB

Of the 63 addresses on Allen Street, Mountain Ash, CF45, 37, Allen Street, Mountain Ash comes out as the 47th largest and the 30th most expensive in our analysis of the public data.

It is also £13k less expensive than the average property across the CF45 district.

• Mountain Ash

  |

  500 m away
• Fernhill

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  1.3 km away
• Penrhiwceiber

  |

  2.1 km away

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