According to data from HM Land Registry, 8, Stream Street, Mountain Ash sits on a plot of 102 m².

We have plot size data on 22 out of 26 other houses in the postcode and 8, Stream Street, Mountain Ash sits on the 11th largest plot.

8, Stream Street, Mountain Ash has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 02 Oct 2013.

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 the Land Registry and our network of Estate Agents, there have been 133 sales of properties similar to 8, Stream Street, Mountain Ash within a radius of 560 metres since 2019.

The most recent example is 31, Napier Street, Mountain Ash, CF45 3HW, a freehold house which sold for £112,000 on the 2nd September 2025.

Read more about house prices in CF45.

• Sold Sep 2025£112,000 | 3 Bed House31, Napier Street, Mountain Ash, CF45 3HW31, Napier Street, Mountain Ash, CF45 3HW
• Sold Dec 2024£85,000 | 3 Bed House55, Napier Street, Mountain Ash, CF45 3HW55, Napier Street, Mountain Ash, CF45 3HW
• Sold Oct 2024£127,500 | 3 Bed House74, Duffryn Street, Mountain Ash, CF45 3HR74, Duffryn Street, Mountain Ash, CF45 3HR
• Sold Oct 2024£55,000 | 3 Bed House39, Dover Street, Mountain Ash, CF45 3HU39, Dover Street, Mountain Ash, CF45 3HU
• Sold Mar 2024£119,000 | 3 Bed House45, Napier Street, Mountain Ash, CF45 3HW45, Napier Street, Mountain Ash, CF45 3HW
• Sold Mar 2024£75,000 | 3 Bed House119, High Street, Mountain Ash, CF45 3LN119, High Street, Mountain Ash, CF45 3LN
• Sold Oct 2023£88,500 | 3 Bed House54, Napier Street, Mountain Ash, CF45 3HW54, Napier Street, Mountain Ash, CF45 3HW
• Sold Aug 2023£60,000 | 3 Bed House7, Cliff Street, Mountain Ash, CF45 3LE7, Cliff Street, Mountain Ash, CF45 3LE
• Sold Aug 2023£100,000 | 3 Bed House57, Napier Street, Mountain Ash, CF45 3HW57, Napier Street, Mountain Ash, CF45 3HW
• Sold Jul 2023£85,000 | 3 Bed House82, Duffryn Street, Mountain Ash, CF45 3HR82, Duffryn Street, Mountain Ash, CF45 3HR
• Sold Apr 2023£80,000 | 3 Bed House12, Stream Street, Mountain Ash, CF45 3LL12, Stream Street, Mountain Ash, CF45 3LL
• Sold Feb 2023£95,000 | 3 Bed House14, Cliff Street, Mountain Ash, CF45 3LE14, Cliff Street, Mountain Ash, CF45 3LE
• Sold Jul 2022£87,500 | 3 Bed House35, Napier Street, Mountain Ash, CF45 3HW35, Napier Street, Mountain Ash, CF45 3HW
• Sold Nov 2021£85,000 | 3 Bed House82, High Street, Mountain Ash, CF45 3LN82, High Street, Mountain Ash, CF45 3LN
• Sold Aug 2021£69,000 | 3 Bed House105, High Street, Mountain Ash, CF45 3LN105, High Street, Mountain Ash, CF45 3LN
• Sold Mar 2021£78,000 | 3 Bed House73, Duffryn Street, Mountain Ash, CF45 3HR73, Duffryn Street, Mountain Ash, CF45 3HR
• Sold Jul 2019£97,000 | 3 Bed House19, Stream Street, Mountain Ash, CF45 3LL19, Stream Street, Mountain Ash, CF45 3LL
• Sold Mar 2019£58,000 | 3 Bed House25, Dover Street, Mountain Ash, CF45 3HU25, Dover Street, Mountain Ash, CF45 3HU
• Sold Feb 2019£66,000 | 3 Bed House15, Dover Street, Mountain Ash, CF45 3HU15, Dover Street, Mountain Ash, CF45 3HU
• Sold Jan 2019£70,000 | 3 Bed House10, Stream Street, Mountain Ash, CF45 3LL10, Stream Street, Mountain Ash, CF45 3LL

Stream Street, Mountain Ash, CF45 has a total of 26 addresses. According to our analysis of all the public data, 8, Stream Street, Mountain Ash is the 12th largest and the 12th most expensive property on the street.

When compared to the postcode district it is £56k 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.