HM Land Registry records the plot of land for 20, Williams Terrace, Treharris as measuring 133 m².

That makes it the largest plot in the postcode, where 18 of the 20 other houses have recorded plot data.

20, Williams Terrace, Treharris has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 17 Jul 2019.

The property is 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 20, Williams Terrace, Treharris completed on 6th June 2014 at £67,000 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 105.4% over the period since June 2014.

• Sold Jun 2014£67,000

Since 2019 303 properties similar to 20, Williams Terrace, Treharris have sold within a radius of 710 metres, per the Land Registry and our network of Estate Agents.

The latest, on the 4th December 2025, was 61, Fell Street, Treharris, CF46 5HN, a freehold house which sold for £125,000.

Read more about house prices in CF46.

• Sold Dec 2025£125,000 | 3 Bed House61, Fell Street, Treharris, CF46 5HN61, Fell Street, Treharris, CF46 5HN
• Sold Nov 2025£128,000 | 3 Bed House17, Thornwood Place, Treharris, CF46 5AB17, Thornwood Place, Treharris, CF46 5AB
• Sold Nov 2025£120,000 | 3 Bed House20, Fell Street, Treharris, CF46 5HN20, Fell Street, Treharris, CF46 5HN
• Sold Oct 2025£150,000 | 3 Bed House18, Thomas Street, Treharris, CF46 5LG18, Thomas Street, Treharris, CF46 5LG
• Sold Jul 2025£107,950 | 3 Bed House44, Penn Street, Treharris, CF46 5HL44, Penn Street, Treharris, CF46 5HL
• Sold Jul 2025£90,000 | 3 Bed House8, Penn Street, Treharris, CF46 5HL8, Penn Street, Treharris, CF46 5HL
• Sold May 2025£92,000 | 3 Bed House45, Penn Street, Treharris, CF46 5HL45, Penn Street, Treharris, CF46 5HL
• Sold Apr 2025£84,000 | 3 Bed House19, Penn Street, Treharris, CF46 5HL19, Penn Street, Treharris, CF46 5HL
• Sold Apr 2025£75,000 | 3 Bed House6, Edward Street, Treharris, CF46 5LF6, Edward Street, Treharris, CF46 5LF
• Sold Mar 2025£142,500 | 3 Bed House4, Fell Street, Treharris, CF46 5HN4, Fell Street, Treharris, CF46 5HN
• Sold Feb 2025£95,000 | 3 Bed House26, Fell Street, Treharris, CF46 5HN26, Fell Street, Treharris, CF46 5HN
• Sold Jan 2025£120,000 | 3 Bed House51, Fell Street, Treharris, CF46 5HN51, Fell Street, Treharris, CF46 5HN
• Sold Sep 2024£84,000 | 3 Bed House43, Penn Street, Treharris, CF46 5HL43, Penn Street, Treharris, CF46 5HL
• Sold Aug 2024£100,000 | 3 Bed House7, Fell Street, Treharris, CF46 5HN7, Fell Street, Treharris, CF46 5HN
• Sold Oct 2023£105,000 | 3 Bed House50, Penn Street, Treharris, CF46 5HL50, Penn Street, Treharris, CF46 5HL
• Sold Apr 2023£110,000 | 3 Bed House19, Webster Street, Treharris, CF46 5HP19, Webster Street, Treharris, CF46 5HP
• Sold Nov 2022£128,000 | 3 Bed House63, Fell Street, Treharris, CF46 5HN63, Fell Street, Treharris, CF46 5HN
• Sold Oct 2021£86,000 | 3 Bed House52, Penn Street, Treharris, CF46 5HL52, Penn Street, Treharris, CF46 5HL
• Sold Apr 2021£107,500 | 3 Bed House65, Fell Street, Treharris, CF46 5HN65, Fell Street, Treharris, CF46 5HN
• Sold Jul 2019£40,000 | 3 Bed House9, Penn Street, Treharris, CF46 5HL9, Penn Street, Treharris, CF46 5HL

Of the 20 addresses on Williams Terrace, Treharris, CF46, 20, Williams Terrace, Treharris comes out as the 3rd largest and the 3rd most expensive in our analysis of the public data.

It is also £30k less expensive than the average property across the CF46 district.

• Quakers Yard

  |

  1.3 km away
• Abercynon

  |

  2.8 km away
• Merthyr Vale

  |

  3.2 km away

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