80, Lock Street, Mountain Ash occupies a 341 m² plot as recorded by HM Land Registry.

Of the 49 other houses in this postcode, 41 have recorded plot sizes, and this one ranks as the 2nd largest.

80, Lock Street, Mountain Ash has an Energy Performance Rating (EPC) of F. This is based on the most recent assessment, dated 05 Dec 2025.

The property is connected to mains gas and has partial double glazing. It is heated using Room heaters, wood logs.

80, Lock Street, Mountain Ash last changed hands on 10th February 2026, selling for £180,000. The transaction was logged as a freehold house by HM Land Registry.

That is its only recorded sale since 1995.

The market for similar properties has dropped by 7.7% since February 2026.

• Sold Feb 2026£180,000

Land Registry records and our Estate Agent network show 3 sales of comparable properties within 1.3 kilometres of 80, Lock Street, Mountain Ash across the last 2 years.

Most recently, 20, Fife Street, Mountain Ash, CF45 4TU, a freehold house, sold at £170,000 on the 5th December 2025.

Read more about house prices in CF45.

• Sold Dec 2025£170,000 | 3 Bed House20, Fife Street, Mountain Ash, CF45 4TU20, Fife Street, Mountain Ash, CF45 4TU
• Sold May 2024£150,000 | 4 Bed House16, Fife Street, Mountain Ash, CF45 4TU16, Fife Street, Mountain Ash, CF45 4TU
• Sold Aug 2021£135,000 | 4 Bed House5, Fife Street, Mountain Ash, CF45 4TU5, Fife Street, Mountain Ash, CF45 4TU

•Nearby is defined as the radius comprising the nearest 2,000 addresses.

Our analysis of the public data ranks 80, Lock Street, Mountain Ash as the 10th largest and the 6th most expensive of the 82 addresses on Lock Street, Abercynon, Mountain Ash, CF45.

Against the CF45 postcode district average, it is £47k more expensive than the typical property.

• 700

  m

  Abercynon
• 1.3

  km

  Quakers Yard
• 3.5

  km

  Penrhiwceiber

Ofcom's latest figures show superfast broadband available in this area.

Environment Agency data suggests this area has a very low risk of flooding.