According to data from HM Land Registry, 14, Allen Street, Mountain Ash sits on a plot of 127 m².

We have plot size data on 28 out of 32 other houses in the postcode and 14, Allen Street, Mountain Ash sits on the 9th largest plot.

14, Allen Street, Mountain Ash has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 17 May 2016.

The property is 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, 14, Allen Street, Mountain Ash was last sold on 22nd March 2017 for £103,500 and was recorded as a freehold house.

The property has had 2 sales since 1995.

Since March 2017, the market for similar properties has risen by 72.2%.

• Sold Mar 2017£103,500
• Sold Jan 2003£24,000

According to the Land Registry and our network of Estate Agents, there have been 123 sales of properties similar to 14, Allen Street, Mountain Ash within a radius of 580 metres since 2016.

The most recent example is 12, Beckett Street, Mountain Ash, CF45 4AW, a freehold house which sold for £150,000 on the 8th May 2026.

Read more about house prices in CF45.

• Sold May 2026£150,000 | 3 Bed House12, Beckett Street, Mountain Ash, CF45 4AW12, Beckett Street, Mountain Ash, CF45 4AW
• Sold Feb 2026£160,000 | 3 Bed House10, The Triangle, Mountain Ash, CF45 4BA10, The Triangle, Mountain Ash, CF45 4BA
• Sold Feb 2026£142,500 | 3 Bed HouseAberpennar Cottage, Dover Street, Mountain Ash, CF45 3HYAberpennar Cottage, Dover Street, Mountain Ash, CF45 3HY
• Sold Oct 2025£130,000 | 3 Bed House26, The Triangle, Mountain Ash, CF45 4BA26, The Triangle, Mountain Ash, CF45 4BA
• Sold Oct 2025£140,000 | 3 Bed House59, Arnold Street, Mountain Ash, CF45 4LF59, Arnold Street, Mountain Ash, CF45 4LF
• Sold Aug 2025£126,000 | 3 Bed House19, Beckett Street, Mountain Ash, CF45 4AW19, Beckett Street, Mountain Ash, CF45 4AW
• Sold Oct 2024£148,500 | 3 Bed House33, Phillip Street, Mountain Ash, CF45 4BE33, Phillip Street, Mountain Ash, CF45 4BE
• Sold Aug 2024£136,760 | 3 Bed House1, Lyle Street, Mountain Ash, CF45 3RG1, Lyle Street, Mountain Ash, CF45 3RG
• Sold Jun 2024£115,000 | 3 Bed House11, Seymour Street, Mountain Ash, CF45 4BL11, Seymour Street, Mountain Ash, CF45 4BL
• Sold May 2024£143,000 | 3 Bed House8, Copley Street, Mountain Ash, CF45 4AS8, Copley Street, Mountain Ash, CF45 4AS
• Sold Mar 2024£144,000 | 3 Bed House24, The Triangle, Mountain Ash, CF45 4BA24, The Triangle, Mountain Ash, CF45 4BA
• Sold Feb 2024£125,000 | 4 Bed House76, Phillip Street, Mountain Ash, CF45 4BG76, Phillip Street, Mountain Ash, CF45 4BG
• Sold Oct 2023£185,000 | 3 Bed House3, Richmond Road, Mountain Ash, CF45 4AN3, Richmond Road, Mountain Ash, CF45 4AN
• Sold Aug 2023£180,000 | 3 Bed House3, Beckett Street, Mountain Ash, CF45 4AW3, Beckett Street, Mountain Ash, CF45 4AW
• Sold Feb 2023£110,000 | 3 Bed House62, Arnold Street, Mountain Ash, CF45 4LF62, Arnold Street, Mountain Ash, CF45 4LF
• Sold Sep 2022£120,000 | 4 Bed House14, Phillip Street, Mountain Ash, CF45 4BE14, Phillip Street, Mountain Ash, CF45 4BE
• Sold May 2021£109,000 | 3 Bed House30, Phillip Street, Mountain Ash, CF45 4BE30, Phillip Street, Mountain Ash, CF45 4BE
• Sold Jul 2020£112,000 | 3 Bed House51, Phillip Street, Mountain Ash, CF45 4BG51, Phillip Street, Mountain Ash, CF45 4BG
• Sold Mar 2020£85,000 | 3 Bed House13, Phillip Street, Mountain Ash, CF45 4BE13, Phillip Street, Mountain Ash, CF45 4BE
• Sold Jun 2016£89,000 | 3 Bed House29, Phillip Street, Mountain Ash, CF45 4BE29, Phillip Street, Mountain Ash, CF45 4BE

Allen Street, Mountain Ash, CF45 has a total of 63 addresses. According to our analysis of all the public data, 14, Allen Street, Mountain Ash is the 19th largest and the 33rd most expensive property on the street.

When compared to the postcode district it is £14k 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.