HM Land Registry records the plot of land for 16, Allen Street, Mountain Ash as measuring 123 m².

That makes it the 14th largest plot in the postcode, where 28 of the 32 other houses have recorded plot data.

16, Allen Street, Mountain Ash has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 16 Nov 2020.

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 16, Allen Street, Mountain Ash completed on 8th April 2022 at £106,000 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 14.7% over the period since April 2022.

• Sold Apr 2022£106,000
• Sold Aug 2010£54,000

Since 2018 146 properties similar to 16, Allen Street, Mountain Ash have sold within a radius of 580 metres, per the Land Registry and our network of Estate Agents.

The latest, on the 4th July 2025, was 50, Phillip Street, Mountain Ash, CF45 4BG, a freehold house which sold for £125,000.

Read more about house prices in CF45.

• Sold Jul 2025£125,000 | 3 Bed House50, Phillip Street, Mountain Ash, CF45 4BG50, Phillip Street, Mountain Ash, CF45 4BG
• Sold Jun 2025£95,000 | 3 Bed House33, Duffryn Street, Mountain Ash, CF45 3NU33, Duffryn Street, Mountain Ash, CF45 3NU
• Sold Apr 2025£120,000 | 3 Bed House22, Allen Street, Mountain Ash, CF45 4BD22, Allen Street, Mountain Ash, CF45 4BD
• Sold Jul 2024£140,000 | 3 Bed House26, Phillip Street, Mountain Ash, CF45 4BE26, Phillip Street, Mountain Ash, CF45 4BE
• Sold May 2024£138,500 | 3 Bed House42, Phillip Street, Mountain Ash, CF45 4BG42, Phillip Street, Mountain Ash, CF45 4BG
• Sold Apr 2024£81,000 | 3 Bed House28, Duffryn Street, Mountain Ash, CF45 3NU28, Duffryn Street, Mountain Ash, CF45 3NU
• Sold Dec 2023£100,000 | 3 Bed House82, Phillip Street, Mountain Ash, CF45 4BG82, Phillip Street, Mountain Ash, CF45 4BG
• Sold Dec 2023£56,500 | 3 Bed House58A, Duffryn Street, Mountain Ash, CF45 3HR58A, Duffryn Street, Mountain Ash, CF45 3HR
• Sold Nov 2023£90,000 | 3 Bed House57, Arnold Street, Mountain Ash, CF45 4LF57, Arnold Street, Mountain Ash, CF45 4LF
• Sold Oct 2023£125,100 | 3 Bed House21, Phillip Street, Mountain Ash, CF45 4BE21, Phillip Street, Mountain Ash, CF45 4BE
• Sold Mar 2023£110,000 | 3 Bed House45, Arnold Street, Mountain Ash, CF45 4LF45, Arnold Street, Mountain Ash, CF45 4LF
• Sold Jul 2022£75,000 | 3 Bed House24A, Allen Street, Mountain Ash, CF45 4BD24A, Allen Street, Mountain Ash, CF45 4BD
• Sold May 2022£92,500 | 3 Bed House16, Copley Street, Mountain Ash, CF45 4AS16, Copley Street, Mountain Ash, CF45 4AS
• Sold Nov 2021£63,250 | 3 Bed House34, Seymour Street, Mountain Ash, CF45 4BL34, Seymour Street, Mountain Ash, CF45 4BL
• Sold Oct 2021£99,000 | 3 Bed House41, Phillip Street, Mountain Ash, CF45 4BG41, Phillip Street, Mountain Ash, CF45 4BG
• Sold Mar 2021£57,500 | 3 Bed House43, Phillip Street, Mountain Ash, CF45 4BG43, Phillip Street, Mountain Ash, CF45 4BG
• Sold Nov 2020£55,000 | 3 Bed House46, Phillip Street, Mountain Ash, CF45 4BG46, Phillip Street, Mountain Ash, CF45 4BG
• Sold Apr 2020£58,000 | 3 Bed House4, Allen Street, Mountain Ash, CF45 4BD4, Allen Street, Mountain Ash, CF45 4BD
• Sold Aug 2019£44,000 | 3 Bed House5, Allen Street, Mountain Ash, CF45 4BD5, Allen Street, Mountain Ash, CF45 4BD
• Sold May 2018£70,000 | 3 Bed House12, Allen Street, Mountain Ash, CF45 4BD12, Allen Street, Mountain Ash, CF45 4BD

Of the 63 addresses on Allen Street, Mountain Ash, CF45, 16, Allen Street, Mountain Ash comes out as the 58th largest and the 59th most expensive in our analysis of the public data.

It is also £45k less expensive than the average property across the CF45 district.

• Mountain Ash

  |

  400 m away
• Fernhill

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  1.2 km away
• Penrhiwceiber

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  2.1 km away

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