HM Land Registry records the plot of land for 5, Halswell Street, Mountain Ash as measuring 114 m².

That makes it the 6th largest plot in the postcode, where 10 of the 12 other houses have recorded plot data.

5, Halswell Street, Mountain Ash has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 18 Dec 2019.

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 5, Halswell Street, Mountain Ash completed on 17th October 2007 at £66,000 and was recorded by HM Land Registry as a freehold house.

Since 1995 the property has sold 3 times.

Values of comparable properties have risen by 139.1% over the period since October 2007.

• Sold Oct 2007£66,000
• Sold Dec 2006£61,000
• Sold Feb 2001£17,000

Since 2014 240 properties similar to 5, Halswell Street, Mountain Ash have sold within a radius of 1.5 kilometres, per the Land Registry and our network of Estate Agents.

The latest, on the 7th November 2025, was 134, Bryntirion, Mountain Ash, CF45 4EX, a freehold house which sold for £88,000.

Read more about house prices in CF45.

• Sold Nov 2025£88,000 | 3 Bed House134, Bryntirion, Mountain Ash, CF45 4EX134, Bryntirion, Mountain Ash, CF45 4EX
• Sold Sep 2025£75,000 | 3 Bed House7, Walsh Street, Mountain Ash, CF45 4YS7, Walsh Street, Mountain Ash, CF45 4YS
• Sold Jun 2025£59,000 | 3 Bed House2, Walsh Street, Mountain Ash, CF45 4YS2, Walsh Street, Mountain Ash, CF45 4YS
• Sold Dec 2024£100,000 | 3 Bed House7, Halswell Street, Mountain Ash, CF45 4YN7, Halswell Street, Mountain Ash, CF45 4YN
• Sold Oct 2024£130,000 | 3 Bed House20, Milbourne Street, Mountain Ash, CF45 4YL20, Milbourne Street, Mountain Ash, CF45 4YL
• Sold Oct 2024£115,000 | 3 Bed House74, Pentwyn Avenue, Mountain Ash, CF45 4YF74, Pentwyn Avenue, Mountain Ash, CF45 4YF
• Sold Sep 2024£70,000 | 3 Bed House15, Milbourne Street, Mountain Ash, CF45 4YL15, Milbourne Street, Mountain Ash, CF45 4YL
• Sold Aug 2024£100,000 | 3 Bed House55, Avondale Street, Mountain Ash, CF45 4YY55, Avondale Street, Mountain Ash, CF45 4YY
• Sold May 2024£86,000 | 3 Bed House13, Milbourne Street, Mountain Ash, CF45 4YL13, Milbourne Street, Mountain Ash, CF45 4YL
• Sold May 2024£95,000 | 3 Bed House4, Commercial Place, Mountain Ash, CF45 4YR4, Commercial Place, Mountain Ash, CF45 4YR
• Sold Mar 2024£58,000 | 3 Bed House58, Avondale Street, Mountain Ash, CF45 4YY58, Avondale Street, Mountain Ash, CF45 4YY
• Sold Aug 2022£80,000 | 3 Bed House56, Avondale Street, Mountain Ash, CF45 4YY56, Avondale Street, Mountain Ash, CF45 4YY
• Sold Jul 2022£105,000 | 3 Bed House13, Walsh Street, Mountain Ash, CF45 4YS13, Walsh Street, Mountain Ash, CF45 4YS
• Sold Jan 2022£110,000 | 3 Bed House57, Avondale Street, Mountain Ash, CF45 4YY57, Avondale Street, Mountain Ash, CF45 4YY
• Sold Oct 2019£64,000 | 3 Bed House19, Milbourne Street, Mountain Ash, CF45 4YL19, Milbourne Street, Mountain Ash, CF45 4YL
• Sold Sep 2019£52,000 | 3 Bed House25, Milbourne Street, Mountain Ash, CF45 4YL25, Milbourne Street, Mountain Ash, CF45 4YL
• Sold Feb 2019£60,000 | 3 Bed House9, Halswell Street, Mountain Ash, CF45 4YN9, Halswell Street, Mountain Ash, CF45 4YN
• Sold Nov 2018£82,000 | 3 Bed House39, Walsh Street, Mountain Ash, CF45 4YS39, Walsh Street, Mountain Ash, CF45 4YS
• Sold May 2014£60,000 | 3 Bed House13, Halswell Street, Mountain Ash, CF45 4YN13, Halswell Street, Mountain Ash, CF45 4YN
• Sold May 2014£40,000 | 3 Bed House4, Walsh Street, Mountain Ash, CF45 4YS4, Walsh Street, Mountain Ash, CF45 4YS

Of the 12 addresses on Halswell Street, Mountain Ash, CF45, 5, Halswell Street, Mountain Ash comes out as the 11th largest and the 11th most expensive in our analysis of the public data.

It is also £55k less expensive than the average property across the CF45 district.

• Penrhiwceiber

  |

  1.1 km away
• Quakers Yard

  |

  1.9 km away
• Abercynon

  |

  2.5 km away

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