HM Land Registry records the plot of land for 2, Stream Street, Mountain Ash as measuring 202 m².

That makes it the largest plot in the postcode, where 22 of the 26 other houses have recorded plot data.

2, Stream Street, Mountain Ash has an Energy Performance Rating (EPC) of E. This is based on the most recent assessment, dated 25 Jun 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).

The most recent sale of 2, Stream Street, Mountain Ash completed on 19th September 2014 at £97,500 and was recorded by HM Land Registry as a freehold house.

Since 1995 this is the property's only sale.

Values of comparable properties have risen by 117.7% over the period since September 2014.

• Sold Sep 2014£97,500

Since 2017 117 properties similar to 2, Stream Street, Mountain Ash have sold within a radius of 560 metres, per the Land Registry and our network of Estate Agents.

The latest, on the 7th November 2025, was 81, Duffryn Street, Mountain Ash, CF45 3HR, a freehold house which sold for £115,000.

Read more about house prices in CF45.

• Sold Nov 2025£115,000 | 3 Bed House81, Duffryn Street, Mountain Ash, CF45 3HR81, Duffryn Street, Mountain Ash, CF45 3HR
• Sold Sep 2025£112,000 | 3 Bed House31, Napier Street, Mountain Ash, CF45 3HW31, Napier Street, Mountain Ash, CF45 3HW
• Sold Jul 2025£49,000 | 3 Bed House49, Commercial Street, Mountain Ash, CF45 3PS49, Commercial Street, Mountain Ash, CF45 3PS
• Sold May 2025£67,000 | 3 Bed House20, Commercial Street, Mountain Ash, CF45 3PS20, Commercial Street, Mountain Ash, CF45 3PS
• Sold Mar 2025£80,000 | 3 Bed House109, High Street, Mountain Ash, CF45 3LN109, High Street, Mountain Ash, CF45 3LN
• Sold Jan 2025£81,500 | 3 Bed House2, Cliff Street, Mountain Ash, CF45 3LE2, Cliff Street, Mountain Ash, CF45 3LE
• Sold Dec 2024£85,000 | 3 Bed House55, Napier Street, Mountain Ash, CF45 3HW55, Napier Street, Mountain Ash, CF45 3HW
• Sold Nov 2024£95,000 | 3 Bed House22, Commercial Street, Mountain Ash, CF45 3PS22, Commercial Street, Mountain Ash, CF45 3PS
• Sold Oct 2024£55,000 | 3 Bed House39, Dover Street, Mountain Ash, CF45 3HU39, Dover Street, Mountain Ash, CF45 3HU
• Sold Oct 2023£88,500 | 3 Bed House54, Napier Street, Mountain Ash, CF45 3HW54, Napier Street, Mountain Ash, CF45 3HW
• Sold Apr 2023£80,000 | 3 Bed House12, Stream Street, Mountain Ash, CF45 3LL12, Stream Street, Mountain Ash, CF45 3LL
• Sold Jul 2022£87,500 | 3 Bed House35, Napier Street, Mountain Ash, CF45 3HW35, Napier Street, Mountain Ash, CF45 3HW
• Sold Mar 2021£78,000 | 3 Bed House73, Duffryn Street, Mountain Ash, CF45 3HR73, Duffryn Street, Mountain Ash, CF45 3HR
• Sold Feb 2021£84,000 | 3 Bed House35, Duffryn Street, Mountain Ash, CF45 3NU35, Duffryn Street, Mountain Ash, CF45 3NU
• Sold Feb 2021£68,000 | 3 Bed House58, Duffryn Street, Mountain Ash, CF45 3HR58, Duffryn Street, Mountain Ash, CF45 3HR
• Sold Dec 2019£40,000 | 3 Bed House33, Dover Street, Mountain Ash, CF45 3HU33, Dover Street, Mountain Ash, CF45 3HU
• Sold Jul 2019£97,000 | 3 Bed House19, Stream Street, Mountain Ash, CF45 3LL19, Stream Street, Mountain Ash, CF45 3LL
• Sold Feb 2019£66,000 | 3 Bed House15, Dover Street, Mountain Ash, CF45 3HU15, Dover Street, Mountain Ash, CF45 3HU
• Sold Oct 2017£70,000 | 3 Bed House2, Napier Street, Mountain Ash, CF45 3HW2, Napier Street, Mountain Ash, CF45 3HW
• Sold Sep 2017£37,000 | 3 Bed House33, Napier Street, Mountain Ash, CF45 3HW33, Napier Street, Mountain Ash, CF45 3HW

Of the 26 addresses on Stream Street, Mountain Ash, CF45, 2, Stream Street, Mountain Ash comes out as the 3rd largest and the 3rd most expensive in our analysis of the public data.

It is also £49k less expensive than the average property across the CF45 district.

• Mountain Ash

  |

  300 m away
• Fernhill

  |

  1.2 km away
• Penrhiwceiber

  |

  1.9 km away

The flood risk here is rated Very Low, based on Environment Agency data.