21, John Street, Aberdare occupies a 150 m² plot as recorded by HM Land Registry.

Of the 44 other houses in this postcode, 38 have recorded plot sizes, and this one ranks as the 15th largest.

21, John Street, Aberdare has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 08 Nov 2017.

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

21, John Street, Aberdare last changed hands on 12th February 2018, selling for £35,000. The transaction was logged as a freehold house by HM Land Registry.

That is its only recorded sale since 1995.

The market for similar properties has risen by 101.8% since February 2018.

Land Registry records and our Estate Agent network show 22 sales of comparable properties within 1.3 kilometres of 21, John Street, Aberdare since 2007.

Most recently, 30, John Street, Aberdare, CF44 6BL, a freehold house, sold at £62,500 on the 22nd October 2025.

Read more about house prices in CF44.

• Sold Oct 2025£62,500 | 2 Bed House30, John Street, Aberdare, CF44 6BL30, John Street, Aberdare, CF44 6BL
• Sold Aug 2025£70,000 | 2 Bed House90, John Street, Aberdare, CF44 6BN90, John Street, Aberdare, CF44 6BN
• Sold Jul 2025£93,500 | 2 Bed House4, Tanycoed Terrace, Aberdare, CF44 6AY4, Tanycoed Terrace, Aberdare, CF44 6AY
• Sold Apr 2025£60,000 | 3 Bed House39, John Street, Aberdare, CF44 6BL39, John Street, Aberdare, CF44 6BL
• Sold Jan 2025£31,010 | 2 Bed House64, John Street, Aberdare, CF44 6BN64, John Street, Aberdare, CF44 6BN
• Sold Nov 2024£68,000 | 2 Bed House46, John Street, Aberdare, CF44 6BL46, John Street, Aberdare, CF44 6BL
• Sold Nov 2023£63,000 | 3 Bed House40, John Street, Aberdare, CF44 6BL40, John Street, Aberdare, CF44 6BL
• Sold Nov 2023£82,500 | 2 Bed House71, John Street, Aberdare, CF44 6BN71, John Street, Aberdare, CF44 6BN
• Sold Jan 2023£50,000 | 3 Bed House60, John Street, Aberdare, CF44 6BN60, John Street, Aberdare, CF44 6BN
• Sold Nov 2021£56,000 | 2 Bed House51, John Street, Aberdare, CF44 6BL51, John Street, Aberdare, CF44 6BL
• Sold Feb 2021£52,000 | 3 Bed House57, John Street, Aberdare, CF44 6BN57, John Street, Aberdare, CF44 6BN
• Sold Dec 2020£69,995 | 3 Bed House74, John Street, Aberdare, CF44 6BN74, John Street, Aberdare, CF44 6BN
• Sold Mar 2020£43,000 | 2 Bed House12, John Street, Aberdare, CF44 6BL12, John Street, Aberdare, CF44 6BL
• Sold Dec 2019£43,000 | 2 Bed House97, John Street, Aberdare, CF44 6BN97, John Street, Aberdare, CF44 6BN
• Sold Oct 2018£47,000 | 3 Bed House96, John Street, Aberdare, CF44 6BN96, John Street, Aberdare, CF44 6BN
• Sold Apr 2016£37,750 | 2 Bed House95, John Street, Aberdare, CF44 6BN95, John Street, Aberdare, CF44 6BN
• Sold Nov 2014£29,000 | 2 Bed House72, John Street, Aberdare, CF44 6BN72, John Street, Aberdare, CF44 6BN
• Sold Dec 2013£30,500 | 2 Bed House73, John Street, Aberdare, CF44 6BN73, John Street, Aberdare, CF44 6BN
• Sold Jun 2008£72,000 | 2 Bed House63, John Street, Aberdare, CF44 6BN63, John Street, Aberdare, CF44 6BN
• Sold May 2007£45,000 | 3 Bed House75, John Street, Aberdare, CF44 6BN75, John Street, Aberdare, CF44 6BN

Our analysis of the public data ranks 21, John Street, Aberdare as the 71st largest and the 75th most expensive of the 129 addresses on John Street, Abercwmboi, Aberdare, CF44.

Against the CF44 postcode district average, it is £77k less expensive than the typical property.

• Fernhill

  |

  1.1 km away
• Cwmbach

  |

  1.4 km away
• Mountain Ash

  |

  2.5 km away

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