According to data from HM Land Registry, 18, Cliff Street, Mountain Ash sits on a plot of 83 m².

We have plot size data on 35 out of 42 other houses in the postcode and 18, Cliff Street, Mountain Ash sits on the 13th largest plot.

18, Cliff Street, Mountain Ash has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 26 Feb 2014.

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, 18, Cliff Street, Mountain Ash was last sold on 23rd March 2007 for £76,500 and was recorded as a freehold house.

The property has had 3 sales since 1995.

Since March 2007, the market for similar properties has risen by 91.8%.

• Sold Mar 2007£76,500
• Sold Oct 2003£42,000
• Sold Aug 2002£11,200

According to the Land Registry and our network of Estate Agents, there have been 26 sales of properties similar to 18, Cliff Street, Mountain Ash within a radius of 580 metres since 2008.

The most recent example is 32, Napier Street, Mountain Ash, CF45 3HW, a freehold house which sold for £60,000 on the 3rd November 2025.

Read more about house prices in CF45.

• Sold Nov 2025£60,000 | 3 Bed House32, Napier Street, Mountain Ash, CF45 3HW32, Napier Street, Mountain Ash, CF45 3HW
• Sold Dec 2024£115,000 | 3 Bed House19, Pryce Street, Mountain Ash, CF45 3NT19, Pryce Street, Mountain Ash, CF45 3NT
• Sold Jul 2024£63,000 | 3 Bed House28, Napier Street, Mountain Ash, CF45 3HW28, Napier Street, Mountain Ash, CF45 3HW
• Sold Feb 2024£89,000 | 3 Bed House24, Napier Street, Mountain Ash, CF45 3HW24, Napier Street, Mountain Ash, CF45 3HW
• Sold Nov 2023£109,000 | 3 Bed House77, Duffryn Street, Mountain Ash, CF45 3HR77, Duffryn Street, Mountain Ash, CF45 3HR
• Sold Oct 2023£78,500 | 3 Bed House30, Napier Street, Mountain Ash, CF45 3HW30, Napier Street, Mountain Ash, CF45 3HW
• Sold Sep 2023£100,000 | 3 Bed House1, St. Davids Place, Mountain Ash, CF45 3NN1, St. Davids Place, Mountain Ash, CF45 3NN
• Sold Jul 2023£85,000 | 3 Bed House4, Commercial Street, Mountain Ash, CF45 3PS4, Commercial Street, Mountain Ash, CF45 3PS
• Sold Aug 2022£72,500 | 3 Bed House30, Duffryn Street, Mountain Ash, CF45 3NU30, Duffryn Street, Mountain Ash, CF45 3NU
• Sold Apr 2022£60,000 | 3 Bed House2, Commercial Street, Mountain Ash, CF45 3PS2, Commercial Street, Mountain Ash, CF45 3PS
• Sold Jun 2021£78,000 | 3 Bed House26, Duffryn Street, Mountain Ash, CF45 3NU26, Duffryn Street, Mountain Ash, CF45 3NU
• Sold May 2021£65,500 | 2 Bed House13, Allen Street, Mountain Ash, CF45 4BD13, Allen Street, Mountain Ash, CF45 4BD
• Sold Mar 2021£72,500 | 3 Bed House36, Napier Street, Mountain Ash, CF45 3HW36, Napier Street, Mountain Ash, CF45 3HW
• Sold Nov 2020£54,000 | 3 Bed House15, Stream Street, Mountain Ash, CF45 3LL15, Stream Street, Mountain Ash, CF45 3LL
• Sold Nov 2019£62,000 | 3 Bed House32, Duffryn Street, Mountain Ash, CF45 3NU32, Duffryn Street, Mountain Ash, CF45 3NU
• Sold Feb 2018£58,000 | 3 Bed House4, Napier Street, Mountain Ash, CF45 3HW4, Napier Street, Mountain Ash, CF45 3HW
• Sold Mar 2017£58,000 | 3 Bed House25, Cliff Street, Mountain Ash, CF45 3LE25, Cliff Street, Mountain Ash, CF45 3LE
• Sold Aug 2016£59,000 | 3 Bed House8, Napier Street, Mountain Ash, CF45 3HW8, Napier Street, Mountain Ash, CF45 3HW
• Sold Dec 2013£37,000 | 3 Bed House6, Cliff Street, Mountain Ash, CF45 3LE6, Cliff Street, Mountain Ash, CF45 3LE
• Sold Feb 2008£57,000 | 3 Bed House24, Cliff Street, Mountain Ash, CF45 3LE24, Cliff Street, Mountain Ash, CF45 3LE

Cliff Street, Mountain Ash, CF45 has a total of 42 addresses. According to our analysis of all the public data, 18, Cliff Street, Mountain Ash is the 42nd largest and the 42nd most expensive property on the street.

When compared to the postcode district it is £65k less expensive than the average property in CF45.

• Mountain Ash

  |

  300 m away
• Fernhill

  |

  1.2 km away
• Penrhiwceiber

  |

  1.9 km away

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