27, Seymour Street, Mountain Ash occupies a 110 m² plot as recorded by HM Land Registry.

Of the 44 other houses in this postcode, 42 have recorded plot sizes, and this one ranks as the 40th largest.

27, Seymour Street, Mountain Ash has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 18 May 2015.

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

27, Seymour Street, Mountain Ash last changed hands on 19th February 2021, selling for £83,000. The transaction was logged as a freehold house by HM Land Registry.

In total it has sold 4 times since 1995.

The market for similar properties has risen by 39.5% since February 2021.

Land Registry records and our Estate Agent network show 139 sales of comparable properties within 590 metres of 27, Seymour Street, Mountain Ash since 2019.

Most recently, 50, Phillip Street, Mountain Ash, CF45 4BG, a freehold house, sold at £125,000 on the 4th July 2025.

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 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 Dec 2023£100,000 | 3 Bed House82, Phillip Street, Mountain Ash, CF45 4BG82, Phillip Street, Mountain Ash, CF45 4BG
• 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 Apr 2023£116,000 | 3 Bed House33, Arnold Street, Mountain Ash, CF45 4LF33, Arnold Street, Mountain Ash, CF45 4LF
• 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 Apr 2022£106,000 | 3 Bed House16, Allen Street, Mountain Ash, CF45 4BD16, Allen Street, Mountain Ash, CF45 4BD
• Sold Nov 2021£63,250 | 3 Bed House34, Seymour Street, Mountain Ash, CF45 4BL34, Seymour Street, Mountain Ash, CF45 4BL
• Sold Nov 2021£68,500 | 3 Bed House19, London Street, Mountain Ash, CF45 4BN19, London Street, Mountain Ash, CF45 4BN
• 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£65,000 | 3 Bed House23, Arnold Street, Mountain Ash, CF45 4LF23, Arnold Street, Mountain Ash, CF45 4LF
• Sold Apr 2020£58,000 | 3 Bed House4, Allen Street, Mountain Ash, CF45 4BD4, Allen Street, Mountain Ash, CF45 4BD
• Sold Oct 2019£83,000 | 3 Bed House14, Arnold Street, Mountain Ash, CF45 4LF14, Arnold Street, Mountain Ash, CF45 4LF
• Sold Aug 2019£44,000 | 3 Bed House5, Allen Street, Mountain Ash, CF45 4BD5, Allen Street, Mountain Ash, CF45 4BD

Our analysis of the public data ranks 27, Seymour Street, Mountain Ash as the 38th largest and the 38th most expensive of the 44 addresses on Seymour Street, Mountain Ash, CF45.

Against the CF45 postcode district average, it is £46k less expensive than the typical property.

• Mountain Ash

  |

  400 m away
• Fernhill

  |

  1.3 km away
• Penrhiwceiber

  |

  2.0 km away

Environment Agency data suggests this area has a Very Low risk of flooding.