According to data from HM Land Registry, 10, John Street, Treharris sits on a plot of 130 m².

We have plot size data on 30 out of 39 other houses in the postcode and 10, John Street, Treharris sits on the 16th largest plot.

10, John Street, Treharris has an Energy Performance Rating (EPC) of B. This is based on the most recent assessment, dated 02 Oct 2025.

The property is 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, 10, John Street, Treharris was last sold on 28th November 2025 for £117,500 and was recorded as a freehold house.

The property has had 3 sales since 1995.

Since November 2025, the market for similar properties has risen by 9.8%.

• Sold Nov 2025£117,500
• Sold May 2009£45,000
• Sold Jan 2003£31,000

According to the Land Registry and our network of Estate Agents, there have been 130 sales of properties similar to 10, John Street, Treharris within a radius of 680 metres since 2018.

The most recent example is 9, Fell Street, Treharris, CF46 5HN, a freehold house which sold for £137,000 on the 1st May 2026.

Read more about house prices in CF46.

• Sold May 2026£137,000 | 3 Bed House9, Fell Street, Treharris, CF46 5HN9, Fell Street, Treharris, CF46 5HN
• Sold Sep 2025£75,000 | 3 Bed House15, Bargoed Terrace, Treharris, CF46 5RB15, Bargoed Terrace, Treharris, CF46 5RB
• Sold Aug 2025£71,000 | 3 Bed House36, Perrott Street, Treharris, CF46 5ER36, Perrott Street, Treharris, CF46 5ER
• Sold Jul 2025£110,000 | 3 Bed House25, Penn Street, Treharris, CF46 5HL25, Penn Street, Treharris, CF46 5HL
• Sold Apr 2025£90,000 | 3 Bed House20, Edward Street, Treharris, CF46 5LF20, Edward Street, Treharris, CF46 5LF
• Sold Aug 2024£76,000 | 3 Bed House16, Fell Street, Treharris, CF46 5HN16, Fell Street, Treharris, CF46 5HN
• Sold Nov 2023£140,000 | 3 Bed House47, Penn Street, Treharris, CF46 5HL47, Penn Street, Treharris, CF46 5HL
• Sold Sep 2023£74,000 | 3 Bed House22, Fell Street, Treharris, CF46 5HN22, Fell Street, Treharris, CF46 5HN
• Sold Jul 2023£115,000 | 3 Bed House24, Penn Street, Treharris, CF46 5HL24, Penn Street, Treharris, CF46 5HL
• Sold Jul 2023£71,000 | 3 Bed House21, Edward Street, Treharris, CF46 5LF21, Edward Street, Treharris, CF46 5LF
• Sold May 2023£120,000 | 3 Bed House68, Fell Street, Treharris, CF46 5HN68, Fell Street, Treharris, CF46 5HN
• Sold Mar 2023£93,000 | 3 Bed House8, Edward Street, Treharris, CF46 5LF8, Edward Street, Treharris, CF46 5LF
• Sold Jan 2023£50,000 | 3 Bed House26, Webster Street, Treharris, CF46 5HP26, Webster Street, Treharris, CF46 5HP
• Sold Jan 2023£94,000 | 3 Bed House22, Edward Street, Treharris, CF46 5LF22, Edward Street, Treharris, CF46 5LF
• Sold Nov 2022£110,000 | 3 Bed House14, Thornwood Place, Treharris, CF46 5AB14, Thornwood Place, Treharris, CF46 5AB
• Sold Apr 2022£105,000 | 3 Bed House2, Fell Street, Treharris, CF46 5HN2, Fell Street, Treharris, CF46 5HN
• Sold Feb 2022£124,000 | 3 Bed House10, Edward Street, Treharris, CF46 5LF10, Edward Street, Treharris, CF46 5LF
• Sold Apr 2019£87,000 | 3 Bed House12, Edward Street, Treharris, CF46 5LF12, Edward Street, Treharris, CF46 5LF
• Sold Mar 2019£46,666 | 3 Bed House26, Edward Street, Treharris, CF46 5LF26, Edward Street, Treharris, CF46 5LF
• Sold Nov 2018£46,200 | 3 Bed House15, Thomas Street, Treharris, CF46 5LG15, Thomas Street, Treharris, CF46 5LG

John Street, Treharris, CF46 has a total of 39 addresses. According to our analysis of all the public data, 10, John Street, Treharris is the 38th largest and the 39th most expensive property on the street.

When compared to the postcode district it is £45k less expensive than the average property in CF46.

• Quakers Yard

  |

  1.3 km away
• Abercynon

  |

  2.6 km away
• Merthyr Vale

  |

  3.3 km away

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