According to data from HM Land Registry, 57, Allen Street, Mountain Ash sits on a plot of 573 m².

We have plot size data on 25 out of 31 other houses in the postcode and 57, Allen Street, Mountain Ash sits on the 2nd largest plot.

57, Allen Street, Mountain Ash has an Energy Performance Rating (EPC) of E. This is based on the most recent assessment, dated 20 Nov 2012.

The property is not connected to mains gas and has fully double glazed windows. It is heated using a boiler and radiators (mains gas).

According to HM Land Registry, 57, Allen Street, Mountain Ash was last sold on 8th December 2021 for £215,000 and was recorded as a freehold house.

The property has had 2 sales since 1995.

Since December 2021, the market for similar properties has risen by 17.8%.

• Sold Dec 2021£215,000
• Sold Jul 2006£105,500

According to the Land Registry and our network of Estate Agents, there have been 27 sales of properties similar to 57, Allen Street, Mountain Ash within a radius of 770 metres since 2014.

The most recent example is Brynteg, High Street, Mountain Ash, CF45 3PB, a freehold house which sold for £275,000 on the 12th February 2026.

Read more about house prices in CF45.

• Sold Feb 2026£275,000 | 4 Bed HouseBrynteg, High Street, Mountain Ash, CF45 3PBBrynteg, High Street, Mountain Ash, CF45 3PB
• Sold Nov 2024£280,000 | 4 Bed House11, Granville Terrace, Mountain Ash, CF45 4AL11, Granville Terrace, Mountain Ash, CF45 4AL
• Sold Aug 2024£193,750 | 4 Bed House22, Granville Terrace, Mountain Ash, CF45 4AL22, Granville Terrace, Mountain Ash, CF45 4AL
• Sold Jul 2024£100,000 | 4 Bed House3, Trem Y Dyffryn, Mountain Ash, CF45 4AQ3, Trem Y Dyffryn, Mountain Ash, CF45 4AQ
• Sold Jun 2024£242,000 | 4 Bed House39, The Triangle, Mountain Ash, CF45 4BA39, The Triangle, Mountain Ash, CF45 4BA
• Sold May 2024£230,000 | 4 Bed House11, Austin Street, Mountain Ash, CF45 4AF11, Austin Street, Mountain Ash, CF45 4AF
• Sold Nov 2022£146,950 | 4 Bed HouseFrondeg, High Street, Mountain Ash, CF45 3PBFrondeg, High Street, Mountain Ash, CF45 3PB
• Sold Sep 2022£193,000 | 4 Bed House63, Allen Street, Mountain Ash, CF45 4BB63, Allen Street, Mountain Ash, CF45 4BB
• Sold Aug 2022£224,995 | 4 Bed House1, Austin Street, Mountain Ash, CF45 4AF1, Austin Street, Mountain Ash, CF45 4AF
• Sold Jan 2022£142,000 | 4 Bed House17, Fox Street, Mountain Ash, CF45 4AG17, Fox Street, Mountain Ash, CF45 4AG
• Sold Aug 2021£260,000 | 4 Bed House9, Aberffrwd Road, Mountain Ash, CF45 4AR9, Aberffrwd Road, Mountain Ash, CF45 4AR
• Sold Dec 2020£255,000 | 4 Bed House19, Aberffrwd Road, Mountain Ash, CF45 4AR19, Aberffrwd Road, Mountain Ash, CF45 4AR
• Sold Jan 2020£145,000 | 4 Bed House50, Allen Street, Mountain Ash, CF45 4BB50, Allen Street, Mountain Ash, CF45 4BB
• Sold Dec 2019£185,000 | 4 Bed House5, Fox Street, Mountain Ash, CF45 4AG5, Fox Street, Mountain Ash, CF45 4AG
• Sold Nov 2019£162,500 | 4 Bed House13, Fox Street, Mountain Ash, CF45 4AG13, Fox Street, Mountain Ash, CF45 4AG
• Sold Feb 2019£125,000 | 4 Bed House7, Fox Street, Mountain Ash, CF45 4AG7, Fox Street, Mountain Ash, CF45 4AG
• Sold Oct 2018£135,000 | 4 Bed House8, Austin Street, Mountain Ash, CF45 4AF8, Austin Street, Mountain Ash, CF45 4AF
• Sold Jun 2016£164,000 | 4 Bed House18, Granville Terrace, Mountain Ash, CF45 4AL18, Granville Terrace, Mountain Ash, CF45 4AL
• Sold Jul 2015£151,000 | 4 Bed House7, Granville Terrace, Mountain Ash, CF45 4AL7, Granville Terrace, Mountain Ash, CF45 4AL
• Sold Mar 2014£95,000 | 4 Bed House3, Campbell Terrace, Mountain Ash, CF45 4AE3, Campbell Terrace, Mountain Ash, CF45 4AE

Allen Street, Mountain Ash, CF45 has a total of 63 addresses. According to our analysis of all the public data, 57, Allen Street, Mountain Ash is the 6th largest and the 3rd most expensive property on the street.

When compared to the postcode district it is £92k more expensive than the average property in CF45.

• Mountain Ash

  |

  500 m away
• Fernhill

  |

  1.3 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.