13, Heol Islwyn, Treharris has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 05 Nov 2025.

The property is connected to mains gas and has fully double glazed windows. It is heated using a boiler and radiators (mains gas).

Land Registry records and our Estate Agent network show 656 sales within 920 metres of 13, Heol Islwyn, Treharris since 2007.

Most recently, 25, Cae Llwyndu, Treharris, CF46 6HX, a freehold house, sold at £292,500 on the 19th October 2022.

Read more about house prices in CF46.

• Sold Oct 2022£292,500 | 4 Bed House25, Cae Llwyndu, Treharris, CF46 6HX25, Cae Llwyndu, Treharris, CF46 6HX
• Sold Feb 2022£186,000 | 3 Bed House98, Heol Tasker, Treharris, CF46 6JB98, Heol Tasker, Treharris, CF46 6JB
• Sold Oct 2021£300,000 | 4 Bed House23, Cae Llwyndu, Treharris, CF46 6HX23, Cae Llwyndu, Treharris, CF46 6HX
• Sold Aug 2021£190,000 | 3 Bed House106, Heol Tasker, Treharris, CF46 6JB106, Heol Tasker, Treharris, CF46 6JB
• Sold Aug 2018£265,000 | 4 Bed House5, Cae'R Gelynnen, Treharris, CF46 6BN5, Cae'R Gelynnen, Treharris, CF46 6BN
• Sold Aug 2018£230,000 | 4 Bed House13, School Close, Treharris, CF46 6HZ13, School Close, Treharris, CF46 6HZ
• Sold Nov 2017£216,000 | 4 Bed House3, School Close, Treharris, CF46 6HZ3, School Close, Treharris, CF46 6HZ
• Sold Aug 2017£164,000 | 3 Bed House36, Ffos Y Cerridden, Treharris, CF46 6HQ36, Ffos Y Cerridden, Treharris, CF46 6HQ
• Sold Mar 2017£225,000 | 4 Bed House9, School Close, Treharris, CF46 6HZ9, School Close, Treharris, CF46 6HZ
• Sold Oct 2016£125,000 | 3 Bed House102, Heol Tasker, Treharris, CF46 6JB102, Heol Tasker, Treharris, CF46 6JB
• Sold Aug 2016£233,000 | 3 Bed House7, Cae'R Gelynnen, Treharris, CF46 6BN7, Cae'R Gelynnen, Treharris, CF46 6BN
• Sold Dec 2015£225,000 | 3 Bed House30, Cae Llwyndu, Treharris, CF46 6HX30, Cae Llwyndu, Treharris, CF46 6HX
• Sold Oct 2015£179,950 | 3 Bed House24, Cae Llwyndu, Treharris, CF46 6HX24, Cae Llwyndu, Treharris, CF46 6HX
• Sold Sep 2013£176,000 | 4 Bed House20, Cae Llwyndu, Treharris, CF46 6HX20, Cae Llwyndu, Treharris, CF46 6HX
• Sold Aug 2013£208,000 | 4 Bed House8, School Close, Treharris, CF46 6HZ8, School Close, Treharris, CF46 6HZ
• Sold Dec 2009£225,000 | 4 Bed House3, Cae'R Gelynnen, Treharris, CF46 6BN3, Cae'R Gelynnen, Treharris, CF46 6BN
• Sold Nov 2008£186,000 | 3 Bed House29, Cae Llwyndu, Treharris, CF46 6HX29, Cae Llwyndu, Treharris, CF46 6HX
• Sold Jun 2008£272,000 | 4 Bed House12, School Close, Treharris, CF46 6HZ12, School Close, Treharris, CF46 6HZ
• Sold Dec 2007£235,000 | 4 Bed House11, School Close, Treharris, CF46 6HZ11, School Close, Treharris, CF46 6HZ
• Sold Nov 2007£279,995 | 4 Bed House10, School Close, Treharris, CF46 6HZ10, School Close, Treharris, CF46 6HZ

Our analysis of the public data ranks 13, Heol Islwyn, Treharris as the 11th largest and the 11th most expensive of the 32 addresses on Heol Islwyn, Nelson, Treharris, CF46.

Against the CF46 postcode district average, it is £64k less expensive than the typical property.

• Abercynon

  |

  2.7 km away
• Quakers Yard

  |

  2.7 km away
• Ystrad Mynach

  |

  3.4 km away

Environment Agency data suggests this area has a Very Low risk of flooding.