According to data from HM Land Registry, 5, Allen Street, Mountain Ash sits on a plot of 67 m².

We have plot size data on 28 out of 32 other houses in the postcode and 5, Allen Street, Mountain Ash sits on the 25th largest plot.

5, Allen Street, Mountain Ash has an Energy Performance Rating (EPC) of E. This is based on the most recent assessment, dated 19 Dec 2018.

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

According to HM Land Registry, 5, Allen Street, Mountain Ash was last sold on 16th August 2019 for £44,000 and was recorded as a freehold house.

The property has had 3 sales since 1995.

Since August 2019, the market for similar properties has risen by 56.3%.

• Sold Aug 2019£44,000
• Sold Nov 2018£39,950
• Sold Jul 2004£42,000

According to the Land Registry and our network of Estate Agents, there have been 186 sales of properties similar to 5, Allen Street, Mountain Ash within a radius of 560 metres since 2018.

The most recent example is 50, Phillip Street, Mountain Ash, CF45 4BG, a freehold house which sold for £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 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 Apr 2025£82,600 | 3 Bed House54, Arnold Street, Mountain Ash, CF45 4LF54, Arnold Street, Mountain Ash, CF45 4LF
• 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 Apr 2024£81,000 | 3 Bed House28, Duffryn Street, Mountain Ash, CF45 3NU28, Duffryn Street, Mountain Ash, CF45 3NU
• Sold Oct 2023£125,100 | 3 Bed House21, Phillip Street, Mountain Ash, CF45 4BE21, Phillip Street, Mountain Ash, CF45 4BE
• Sold Sep 2023£75,000 | 3 Bed House5, Duffryn Street, Mountain Ash, CF45 3NU5, Duffryn Street, Mountain Ash, CF45 3NU
• Sold Aug 2023£66,000 | 3 Bed House6, Duffryn Street, Mountain Ash, CF45 3NU6, Duffryn Street, Mountain Ash, CF45 3NU
• Sold Aug 2023£112,500 | 3 Bed House4, Woodland Terrace, Mountain Ash, CF45 3RF4, Woodland Terrace, Mountain Ash, CF45 3RF
• Sold Jul 2022£75,000 | 3 Bed House24A, Allen Street, Mountain Ash, CF45 4BD24A, Allen Street, Mountain Ash, CF45 4BD
• Sold Jul 2022£135,000 | 3 Bed House17, Allen Street, Mountain Ash, CF45 4BD17, 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 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 Jan 2021£42,000 | 3 Bed House12, Oxford Street, Mountain Ash, CF45 3PL12, Oxford Street, Mountain Ash, CF45 3PL
• Sold Apr 2020£58,000 | 3 Bed House4, Allen Street, Mountain Ash, CF45 4BD4, Allen Street, Mountain Ash, CF45 4BD
• Sold May 2018£70,000 | 3 Bed House12, Allen Street, Mountain Ash, CF45 4BD12, Allen Street, Mountain Ash, CF45 4BD

Allen Street, Mountain Ash, CF45 has a total of 63 addresses. According to our analysis of all the public data, 5, Allen Street, Mountain Ash is the 53rd largest and the 53rd most expensive property on the street.

When compared to the postcode district it is £42k less expensive than the average property in CF45.

• Mountain Ash

  |

  400 m away
• Fernhill

  |

  1.2 km away
• Penrhiwceiber

  |

  2.1 km away

According to data from the Environment Agency, the flood risk in this area is considered to be Very Low.