HM Land Registry records the plot of land for 11, Arnold Street, Mountain Ash as measuring 113 m².

That makes it the 18th largest plot in the postcode, where 55 of the 65 other houses have recorded plot data.

11, Arnold Street, Mountain Ash has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 22 Jun 2017.

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 11, Arnold Street, Mountain Ash completed on 23rd October 2020 at £90,000 and was recorded by HM Land Registry as a freehold house.

Since 1995 the property has sold 4 times.

Values of comparable properties have risen by 35.7% over the period since October 2020.

• Sold Oct 2020£90,000
• Sold May 2018£80,000
• Sold Jun 2008£98,000

Since 2008 152 properties similar to 11, Arnold Street, Mountain Ash have sold within a radius of 720 metres, per the Land Registry and our network of Estate Agents.

The latest, on the 4th February 2026, was Aberpennar Cottage, Dover Street, Mountain Ash, CF45 3HY, a freehold house which sold for £142,500.

Read more about house prices in CF45.

• Sold Feb 2026£142,500 | 3 Bed HouseAberpennar Cottage, Dover Street, Mountain Ash, CF45 3HYAberpennar Cottage, Dover Street, Mountain Ash, CF45 3HY
• Sold Oct 2025£140,000 | 3 Bed House59, Arnold Street, Mountain Ash, CF45 4LF59, Arnold Street, Mountain Ash, CF45 4LF
• Sold Aug 2025£126,000 | 3 Bed House19, Beckett Street, Mountain Ash, CF45 4AW19, Beckett Street, Mountain Ash, CF45 4AW
• Sold Jul 2025£115,000 | 3 Bed House13, London Street, Mountain Ash, CF45 4BN13, London Street, Mountain Ash, CF45 4BN
• Sold Oct 2024£148,500 | 3 Bed House33, Phillip Street, Mountain Ash, CF45 4BE33, Phillip Street, Mountain Ash, CF45 4BE
• Sold Jun 2024£115,000 | 3 Bed House11, Seymour Street, Mountain Ash, CF45 4BL11, Seymour Street, Mountain Ash, CF45 4BL
• Sold May 2024£143,000 | 3 Bed House8, Copley Street, Mountain Ash, CF45 4AS8, Copley Street, Mountain Ash, CF45 4AS
• Sold Feb 2024£125,000 | 4 Bed House76, Phillip Street, Mountain Ash, CF45 4BG76, Phillip Street, Mountain Ash, CF45 4BG
• Sold Jan 2024£105,000 | 3 Bed House12, Phillip Street, Mountain Ash, CF45 4BE12, Phillip Street, Mountain Ash, CF45 4BE
• Sold Feb 2023£110,000 | 3 Bed House62, Arnold Street, Mountain Ash, CF45 4LF62, Arnold Street, Mountain Ash, CF45 4LF
• Sold Jun 2022£129,995 | 3 Bed House4, Copley Street, Mountain Ash, CF45 4AS4, Copley Street, Mountain Ash, CF45 4AS
• Sold Mar 2022£115,000 | 3 Bed House56, Phillip Street, Mountain Ash, CF45 4BG56, Phillip Street, Mountain Ash, CF45 4BG
• Sold Sep 2021£107,500 | 3 Bed House37, Arnold Street, Mountain Ash, CF45 4LF37, Arnold Street, Mountain Ash, CF45 4LF
• Sold May 2021£109,000 | 3 Bed House30, Phillip Street, Mountain Ash, CF45 4BE30, Phillip Street, Mountain Ash, CF45 4BE
• Sold Apr 2021£94,250 | 3 Bed House8, Alexandra Terrace, Mountain Ash, CF45 4LE8, Alexandra Terrace, Mountain Ash, CF45 4LE
• Sold Jul 2020£112,000 | 3 Bed House51, Phillip Street, Mountain Ash, CF45 4BG51, Phillip Street, Mountain Ash, CF45 4BG
• Sold Mar 2020£85,000 | 3 Bed House13, Phillip Street, Mountain Ash, CF45 4BE13, Phillip Street, Mountain Ash, CF45 4BE
• Sold May 2017£72,000 | 3 Bed House53, Arnold Street, Mountain Ash, CF45 4LF53, Arnold Street, Mountain Ash, CF45 4LF
• Sold Feb 2017£73,000 | 3 Bed House50, Arnold Street, Mountain Ash, CF45 4LF50, Arnold Street, Mountain Ash, CF45 4LF
• Sold Oct 2008£51,000 | 3 Bed House12, Arnold Street, Mountain Ash, CF45 4LF12, Arnold Street, Mountain Ash, CF45 4LF

Of the 65 addresses on Arnold Street, Mountain Ash, CF45, 11, Arnold Street, Mountain Ash comes out as the 19th largest and the 16th most expensive in our analysis of the public data.

It is also £24k less expensive than the average property across the CF45 district.

• Mountain Ash

  |

  400 m away
• Fernhill

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  1.5 km away
• Penrhiwceiber

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  2.0 km away

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