HM Land Registry records the plot of land for 38, Seymour Street, Mountain Ash as measuring 116 m².

That makes it the 32nd largest plot in the postcode, where 42 of the 44 other houses have recorded plot data.

38, Seymour Street, Mountain Ash has an Energy Performance Rating (EPC) of E. This is based on the most recent assessment, dated 09 Feb 2016.

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

The most recent sale of 38, Seymour Street, Mountain Ash completed on 16th November 2017 at £67,500 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 72.3% over the period since November 2017.

Since 2015 182 properties similar to 38, Seymour Street, Mountain Ash have sold within a radius of 620 metres, per the Land Registry and our network of Estate Agents.

The latest, on the 13th April 2026, was 14, Lyndhurst Street, Mountain Ash, CF45 4AP, a freehold house which sold for £157,500.

Read more about house prices in CF45.

• Sold Apr 2026£157,500 | 3 Bed House14, Lyndhurst Street, Mountain Ash, CF45 4AP14, Lyndhurst Street, Mountain Ash, CF45 4AP
• Sold Feb 2026£142,500 | 3 Bed HouseAberpennar Cottage, Dover Street, Mountain Ash, CF45 3HYAberpennar Cottage, Dover Street, Mountain Ash, CF45 3HY
• Sold Nov 2025£169,995 | 3 Bed House34, The Triangle, Mountain Ash, CF45 4BA34, The Triangle, Mountain Ash, CF45 4BA
• 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 May 2024£143,000 | 3 Bed House8, Copley Street, Mountain Ash, CF45 4AS8, Copley Street, Mountain Ash, CF45 4AS
• 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 Dec 2020£94,000 | 3 Bed House39, Seymour Street, Mountain Ash, CF45 4BL39, Seymour Street, Mountain Ash, CF45 4BL
• Sold Oct 2020£90,000 | 3 Bed House11, Arnold Street, Mountain Ash, CF45 4LF11, Arnold Street, Mountain Ash, CF45 4LF
• 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 Dec 2015£62,000 | 3 Bed House39, Phillip Street, Mountain Ash, CF45 4BE39, Phillip Street, Mountain Ash, CF45 4BE

Of the 44 addresses on Seymour Street, Mountain Ash, CF45, 38, Seymour Street, Mountain Ash comes out as the 11th largest and the 11th most expensive in our analysis of the public data.

It is also £23k less expensive than the average property across the CF45 district.

• Mountain Ash

  |

  400 m away
• Fernhill

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  1.3 km away
• Penrhiwceiber

  |

  2.0 km away

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