HM Land Registry records the plot of land for 36, Seymour Street, Mountain Ash as measuring 125 m².

That makes it the 13th largest plot in the postcode, where 42 of the 44 other houses have recorded plot data.

36, Seymour Street, Mountain Ash has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 06 Jun 2025.

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 36, Seymour Street, Mountain Ash completed on 16th May 2011 at £64,000 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 86.2% over the period since May 2011.

• Sold May 2011£64,000
• Sold May 2005£58,000
• Sold Oct 2001£34,950

Since 2018 84 properties similar to 36, 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 10th June 2026, was 15, Cliff Street, Mountain Ash, CF45 3LE, a freehold house which sold for £103,000.

Read more about house prices in CF45.

• Sold Jun 2026£103,000 | 3 Bed House15, Cliff Street, Mountain Ash, CF45 3LE15, Cliff Street, Mountain Ash, CF45 3LE
• 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 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 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 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 Sep 2021£90,000 | 3 Bed House85, Phillip Street, Mountain Ash, CF45 4BG85, Phillip Street, Mountain Ash, CF45 4BG
• Sold May 2021£65,500 | 2 Bed House13, Allen Street, Mountain Ash, CF45 4BD13, Allen Street, Mountain Ash, CF45 4BD
• 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 Apr 2020£93,500 | 3 Bed House35, Seymour Street, Mountain Ash, CF45 4BL35, Seymour Street, Mountain Ash, CF45 4BL
• Sold Jan 2020£61,000 | 3 Bed House87, Phillip Street, Mountain Ash, CF45 4BG87, Phillip Street, Mountain Ash, CF45 4BG
• Sold Oct 2019£83,000 | 3 Bed House14, Arnold Street, Mountain Ash, CF45 4LF14, Arnold Street, Mountain Ash, CF45 4LF
• Sold Nov 2018£52,950 | 3 Bed House95, Phillip Street, Mountain Ash, CF45 4BG95, Phillip Street, Mountain Ash, CF45 4BG

Of the 44 addresses on Seymour Street, Mountain Ash, CF45, 36, Seymour Street, Mountain Ash comes out as the 39th largest and the 39th most expensive in our analysis of the public data.

It is also £50k less expensive than the average property across the CF45 district.

• Mountain Ash

  |

  400 m away
• Fernhill

  |

  1.3 km away
• Penrhiwceiber

  |

  2.0 km away

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