According to data from HM Land Registry, 20, Heol Isaf, Treharris sits on a plot of 319 m².

We have plot size data on 35 out of 35 other houses in the postcode and 20, Heol Isaf, Treharris sits on the 23rd largest plot.

20, Heol Isaf, Treharris has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 28 Jan 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, 20, Heol Isaf, Treharris was last sold on 9th May 2014 for £125,000 and was recorded as a freehold house.

The property has only had this single sale since 1995.

Since May 2014, the market for similar properties has risen by 21.5%.

• Sold May 2014£125,000

According to the Land Registry and our network of Estate Agents, there have been 168 sales of properties similar to 20, Heol Isaf, Treharris within a radius of 1.2 kilometres since 2007.

The most recent example is 24, Heol Isaf, Treharris, CF46 6NS, a freehold house which sold for £240,000 on the 18th March 2026.

Read more about house prices in CF46.

• Sold Mar 2026£240,000 | 3 Bed House24, Heol Isaf, Treharris, CF46 6NS24, Heol Isaf, Treharris, CF46 6NS
• Sold Jan 2026£172,500 | 3 Bed House41, Beech Tree Way, Treharris, CF46 6NU41, Beech Tree Way, Treharris, CF46 6NU
• Sold Oct 2025£335,000 | 3 Bed House12, Heol Uchaf, Treharris, CF46 6NT12, Heol Uchaf, Treharris, CF46 6NT
• Sold Oct 2025£255,000 | 3 Bed House49, Beech Tree Way, Treharris, CF46 6NU49, Beech Tree Way, Treharris, CF46 6NU
• Sold Aug 2025£260,000 | 3 Bed House14, Heol Uchaf, Treharris, CF46 6NT14, Heol Uchaf, Treharris, CF46 6NT
• Sold Apr 2025£227,000 | 3 Bed House45, Ashgrove Terrace, Treharris, CF46 6LS45, Ashgrove Terrace, Treharris, CF46 6LS
• Sold Nov 2024£200,000 | 3 Bed House16, Beech Tree Way, Treharris, CF46 6NU16, Beech Tree Way, Treharris, CF46 6NU
• Sold May 2024£160,000 | 3 Bed House12, Mountain Way, Treharris, CF46 6NY12, Mountain Way, Treharris, CF46 6NY
• Sold Oct 2022£200,000 | 3 Bed House2, Beech Tree Way, Treharris, CF46 6NU2, Beech Tree Way, Treharris, CF46 6NU
• Sold Oct 2022£78,000 | 3 Bed House8, Heol Isaf, Treharris, CF46 6NS8, Heol Isaf, Treharris, CF46 6NS
• Sold Sep 2022£245,000 | 3 Bed House15, Heol Isaf, Treharris, CF46 6NS15, Heol Isaf, Treharris, CF46 6NS
• Sold Sep 2022£245,000 | 3 Bed House25, Heol Uchaf, Treharris, CF46 6NT25, Heol Uchaf, Treharris, CF46 6NT
• Sold Aug 2022£212,000 | 3 Bed House11, Heol Isaf, Treharris, CF46 6NS11, Heol Isaf, Treharris, CF46 6NS
• Sold Aug 2022£229,950 | 3 Bed House9, Beech Tree Way, Treharris, CF46 6NU9, Beech Tree Way, Treharris, CF46 6NU
• Sold Apr 2022£225,000 | 2 Bed House15, Beech Tree Way, Treharris, CF46 6NU15, Beech Tree Way, Treharris, CF46 6NU
• Sold May 2021£175,000 | 3 Bed House20, Mountain Way, Treharris, CF46 6NY20, Mountain Way, Treharris, CF46 6NY
• Sold Mar 2021£204,000 | 3 Bed House6, Heol Isaf, Treharris, CF46 6NS6, Heol Isaf, Treharris, CF46 6NS
• Sold Sep 2017£145,000 | 3 Bed House29, Heol Isaf, Treharris, CF46 6NS29, Heol Isaf, Treharris, CF46 6NS
• Sold Aug 2014£156,000 | 3 Bed House21, Heol Isaf, Treharris, CF46 6NS21, Heol Isaf, Treharris, CF46 6NS
• Sold Oct 2007£109,000 | 3 Bed House30, Heol Isaf, Treharris, CF46 6NS30, Heol Isaf, Treharris, CF46 6NS

Heol Isaf, Nelson, Treharris, CF46 has a total of 35 addresses. According to our analysis of all the public data, 20, Heol Isaf, Treharris is the 26th largest and the 27th most expensive property on the street.

When compared to the postcode district it is £75k more expensive than the average property in CF46.

• Ystrad Mynach

  |

  2.7 km away
• Quakers Yard

  |

  3.4 km away
• Abercynon

  |

  3.4 km away

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