HM Land Registry records the plot of land for Gilwern, Treharris as measuring 8,385 m².

That makes it the 2nd largest plot in the postcode, where 8 of the 10 other houses have recorded plot data.

Gilwern, Treharris has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 31 Jul 2012.

The property is not connected to mains gas and has fully double glazed windows. It is heated using a boiler and radiators (oil).

Since 2013 47 properties similar to Gilwern, Treharris have sold within a radius of 1.4 kilometres, per the Land Registry and our network of Estate Agents.

The latest, on the 24th April 2026, was 65, Tawel Fan, Treharris, CF46 6EH, a freehold house which sold for £264,000.

Read more about house prices in CF46.

• Sold Apr 2026£264,000 | 3 Bed House65, Tawel Fan, Treharris, CF46 6EH65, Tawel Fan, Treharris, CF46 6EH
• Sold Oct 2025£208,000 | 3 Bed House25, Tawel Fan, Treharris, CF46 6EH25, Tawel Fan, Treharris, CF46 6EH
• Sold Aug 2025£260,000 | 3 Bed House14, Heol Uchaf, Treharris, CF46 6NT14, Heol Uchaf, Treharris, CF46 6NT
• Sold Aug 2025£65,000 | 3 Bed House62, Tawel Fan, Treharris, CF46 6EH62, Tawel Fan, Treharris, CF46 6EH
• Sold Mar 2025£220,000 | 3 Bed House10, Tawel Fan, Treharris, CF46 6EH10, Tawel Fan, Treharris, CF46 6EH
• Sold Aug 2024£235,000 | 3 Bed House6, Clos Cae Pwll, Treharris, CF46 6LA6, Clos Cae Pwll, Treharris, CF46 6LA
• Sold Jun 2024£220,000 | 3 Bed House34, Ashgrove Terrace, Treharris, CF46 6LS34, Ashgrove Terrace, Treharris, CF46 6LS
• Sold Mar 2024£260,000 | 3 Bed House57, Ashgrove Terrace, Treharris, CF46 6LS57, Ashgrove Terrace, Treharris, CF46 6LS
• Sold Sep 2023£260,000 | 3 Bed House9, Cae Llwyndu, Treharris, CF46 6HX9, Cae Llwyndu, Treharris, CF46 6HX
• Sold Mar 2023£250,000 | 3 Bed House17, Pine Tree Way, Treharris, CF46 6PA17, Pine Tree Way, Treharris, CF46 6PA
• Sold Jun 2022£289,950 | 3 Bed House14, Clos Waun Ceffyl, Treharris, CF46 6LB14, Clos Waun Ceffyl, Treharris, CF46 6LB
• Sold Dec 2021£200,000 | 3 Bed House26, Pine Tree Way, Treharris, CF46 6PA26, Pine Tree Way, Treharris, CF46 6PA
• Sold May 2021£123,000 | 3 Bed House9, Heol Bryn Fab, Treharris, CF46 6JF9, Heol Bryn Fab, Treharris, CF46 6JF
• Sold Feb 2017£158,000 | 3 Bed House15, Cae Llwyndu, Treharris, CF46 6HX15, Cae Llwyndu, Treharris, CF46 6HX
• Sold Jan 2017£172,500 | 3 Bed House5, Cae Llwyndu, Treharris, CF46 6HX5, Cae Llwyndu, Treharris, CF46 6HX
• Sold Aug 2016£237,950 | 3 Bed House32, Cae Llwyndu, Treharris, CF46 6HX32, Cae Llwyndu, Treharris, CF46 6HX
• Sold Dec 2015£225,000 | 3 Bed House30, Cae Llwyndu, Treharris, CF46 6HX30, Cae Llwyndu, Treharris, CF46 6HX
• Sold Nov 2015£155,000 | 3 Bed House17, Clos Cae Pwll, Treharris, CF46 6LA17, Clos Cae Pwll, Treharris, CF46 6LA
• Sold Oct 2015£179,950 | 3 Bed House24, Cae Llwyndu, Treharris, CF46 6HX24, Cae Llwyndu, Treharris, CF46 6HX
• Sold Aug 2013£171,950 | 3 Bed HouseLewis Wood, Tydu Road, Treharris, CF46 6PHLewis Wood, Tydu Road, Treharris, CF46 6PH

Of the 10 addresses on Tydu Road, Nelson, Treharris, CF46, Gilwern, Treharris comes out as the 8th largest and the 8th most expensive in our analysis of the public data.

It is also £136k more expensive than the average property across the CF46 district.

• Ystrad Mynach

  |

  2.8 km away
• Abercynon

  |

  3.1 km away
• Quakers Yard

  |

  3.4 km away

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