3, Knight Street, Mountain Ash occupies a 112 m² plot as recorded by HM Land Registry.

3, Knight Street, Mountain Ash has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 06 Dec 2025.

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

3, Knight Street, Mountain Ash last changed hands on 25th March 2022, selling for £127,500. The transaction was logged as a freehold house by HM Land Registry.

In total it has sold 7 times since 1995.

The market for similar properties has risen by 45.6% since March 2022.

• Sold Mar 2022£127,500
• Sold Dec 2019£63,750
• Sold Aug 2013£48,500

Land Registry records and our Estate Agent network show 64 sales of comparable properties within 500 metres of 3, Knight Street, Mountain Ash since 2020.

Most recently, 19, Lyle Street, Mountain Ash, CF45 3RG, a freehold house, sold at £140,000 on the 17th December 2025.

Read more about house prices in CF45.

• Sold Dec 2025£140,000 | 3 Bed House19, Lyle Street, Mountain Ash, CF45 3RG19, Lyle Street, Mountain Ash, CF45 3RG
• Sold Nov 2025£157,000 | 4 Bed House38, Aberpennar Street, Mountain Ash, CF45 3LS38, Aberpennar Street, Mountain Ash, CF45 3LS
• Sold Sep 2025£142,000 | 4 Bed House33, Kingcraft Street, Mountain Ash, CF45 3LT33, Kingcraft Street, Mountain Ash, CF45 3LT
• Sold Dec 2024£165,000 | 3 Bed House6, Eva Street, Mountain Ash, CF45 3LF6, Eva Street, Mountain Ash, CF45 3LF
• Sold Nov 2024£120,000 | 3 Bed House3, Aberpennar Street, Mountain Ash, CF45 3LS3, Aberpennar Street, Mountain Ash, CF45 3LS
• Sold Nov 2024£195,000 | 3 Bed HouseLlyswerfa, Hamilton Street, Mountain Ash, CF45 3RHLlyswerfa, Hamilton Street, Mountain Ash, CF45 3RH
• Sold Aug 2024£136,760 | 3 Bed House1, Lyle Street, Mountain Ash, CF45 3RG1, Lyle Street, Mountain Ash, CF45 3RG
• Sold Jul 2024£137,500 | 3 Bed House1, Hamilton Street, Mountain Ash, CF45 3RH1, Hamilton Street, Mountain Ash, CF45 3RH
• Sold Feb 2024£125,000 | 4 Bed House76, Phillip Street, Mountain Ash, CF45 4BG76, Phillip Street, Mountain Ash, CF45 4BG
• Sold Apr 2023£140,000 | 4 Bed House1, Aberpennar Street, Mountain Ash, CF45 3LS1, Aberpennar Street, Mountain Ash, CF45 3LS
• Sold Feb 2023£110,000 | 3 Bed House62, Arnold Street, Mountain Ash, CF45 4LF62, Arnold Street, Mountain Ash, CF45 4LF
• Sold Nov 2022£120,000 | 3 Bed House8, Kingcraft Street, Mountain Ash, CF45 3LT8, Kingcraft Street, Mountain Ash, CF45 3LT
• Sold Oct 2022£130,000 | 3 Bed House16, Kingcraft Street, Mountain Ash, CF45 3LT16, Kingcraft Street, Mountain Ash, CF45 3LT
• Sold Oct 2022£110,000 | 3 Bed House23, Gorsedd Street, Mountain Ash, CF45 3LR23, Gorsedd Street, Mountain Ash, CF45 3LR
• Sold Sep 2022£120,000 | 4 Bed House14, Phillip Street, Mountain Ash, CF45 4BE14, Phillip Street, Mountain Ash, CF45 4BE
• Sold Apr 2022£93,000 | 4 Bed House10, Darran Road, Mountain Ash, CF45 3HT10, Darran Road, Mountain Ash, CF45 3HT
• Sold Apr 2022£145,000 | 4 Bed House19, Aberpennar Street, Mountain Ash, CF45 3LS19, Aberpennar Street, Mountain Ash, CF45 3LS
• Sold Nov 2021£138,000 | 3 Bed House20, Gorsedd Street, Mountain Ash, CF45 3LR20, Gorsedd Street, Mountain Ash, CF45 3LR
• Sold Sep 2021£129,950 | 4 Bed House17, Aberpennar Street, Mountain Ash, CF45 3LS17, Aberpennar Street, Mountain Ash, CF45 3LS
• Sold Jan 2020£100,000 | 4 Bed House32, Kingcraft Street, Mountain Ash, CF45 3LT32, Kingcraft Street, Mountain Ash, CF45 3LT

Our analysis of the public data ranks 3, Knight Street, Mountain Ash as the largest and the most expensive of the 4 addresses on Knight Street, Mountain Ash, CF45.

Against the CF45 postcode district average, it is £19k less expensive than the typical property.

• Mountain Ash

  |

  200 m away
• Fernhill

  |

  1.2 km away
• Penrhiwceiber

  |

  1.9 km away

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