HM Land Registry records the plot of land for 21, Windsor Road, Mountain Ash as measuring 157 m².

That makes it the 11th largest plot in the postcode, where 21 of the 27 other houses have recorded plot data.

21, Windsor Road, Mountain Ash has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 23 Jan 2014.

The property is not connected to mains gas and has partial double glazing. It is heated using a boiler and radiators (mains gas).

The most recent sale of 21, Windsor Road, Mountain Ash completed on 30th July 2020 at £99,500 and was recorded by HM Land Registry as a freehold house.

Since 1995 the property has sold 3 times.

Values of comparable properties have risen by 79.4% over the period since July 2020.

• Sold Jul 2020£99,500
• Sold Jul 2019£62,500
• Sold Dec 1998£18,000

Since 2017 194 properties similar to 21, Windsor Road, Mountain Ash have sold within a radius of 700 metres, per the Land Registry and our network of Estate Agents.

The latest, on the 17th October 2025, was 9, Arthur Street, Mountain Ash, CF45 3BL, a freehold house which sold for £125,000.

Read more about house prices in CF45.

• Sold Oct 2025£125,000 | 3 Bed House9, Arthur Street, Mountain Ash, CF45 3BL9, Arthur Street, Mountain Ash, CF45 3BL
• Sold Sep 2025£125,000 | 3 Bed House26, Albany Street, Mountain Ash, CF45 3BE26, Albany Street, Mountain Ash, CF45 3BE
• Sold Jul 2025£95,000 | 3 Bed House38, Albert Street, Mountain Ash, CF45 3BA38, Albert Street, Mountain Ash, CF45 3BA
• Sold Jun 2025£90,000 | 3 Bed House26, Mount Pleasant Terrace, Mountain Ash, CF45 3AN26, Mount Pleasant Terrace, Mountain Ash, CF45 3AN
• Sold May 2025£101,000 | 3 Bed House40, Arthur Street, Mountain Ash, CF45 3BL40, Arthur Street, Mountain Ash, CF45 3BL
• Sold May 2025£103,000 | 3 Bed House15, Albany Street, Mountain Ash, CF45 3BE15, Albany Street, Mountain Ash, CF45 3BE
• Sold Apr 2025£72,000 | 3 Bed House16, Albert Street, Mountain Ash, CF45 3BA16, Albert Street, Mountain Ash, CF45 3BA
• Sold Apr 2025£118,000 | 3 Bed House11, Albany Street, Mountain Ash, CF45 3BE11, Albany Street, Mountain Ash, CF45 3BE
• Sold Feb 2025£99,950 | 3 Bed House7, Albany Street, Mountain Ash, CF45 3BE7, Albany Street, Mountain Ash, CF45 3BE
• Sold Nov 2024£85,000 | 3 Bed House3, Mount Pleasant Terrace, Mountain Ash, CF45 3AN3, Mount Pleasant Terrace, Mountain Ash, CF45 3AN
• Sold Jul 2024£105,000 | 3 Bed House14, Clarence Street, Mountain Ash, CF45 3BB14, Clarence Street, Mountain Ash, CF45 3BB
• Sold Jul 2024£75,000 | 3 Bed House12, Hughes Street, Mountain Ash, CF45 3UG12, Hughes Street, Mountain Ash, CF45 3UG
• Sold Jul 2024£108,000 | 3 Bed House41, Arthur Street, Mountain Ash, CF45 3BL41, Arthur Street, Mountain Ash, CF45 3BL
• Sold Jun 2024£80,000 | 3 Bed House20, Windsor Road, Mountain Ash, CF45 3BH20, Windsor Road, Mountain Ash, CF45 3BH
• Sold Jul 2023£118,000 | 3 Bed House25, Mount Pleasant Terrace, Mountain Ash, CF45 3AN25, Mount Pleasant Terrace, Mountain Ash, CF45 3AN
• Sold Jun 2023£68,000 | 3 Bed House8, Albany Street, Mountain Ash, CF45 3BE8, Albany Street, Mountain Ash, CF45 3BE
• Sold Apr 2023£86,000 | 3 Bed House44, Arthur Street, Mountain Ash, CF45 3BL44, Arthur Street, Mountain Ash, CF45 3BL
• Sold May 2022£100,000 | 3 Bed House47, Mount Pleasant Terrace, Mountain Ash, CF45 3AN47, Mount Pleasant Terrace, Mountain Ash, CF45 3AN
• Sold Sep 2019£39,000 | 3 Bed House34, Arthur Street, Mountain Ash, CF45 3BL34, Arthur Street, Mountain Ash, CF45 3BL
• Sold Jul 2017£39,500 | 3 Bed House38, Arthur Street, Mountain Ash, CF45 3BL38, Arthur Street, Mountain Ash, CF45 3BL

Of the 27 addresses on Windsor Road, Mountain Ash, CF45, 21, Windsor Road, Mountain Ash comes out as the 27th largest and the 27th most expensive in our analysis of the public data.

It is also £54k less expensive than the average property across the CF45 district.

• Mountain Ash

  |

  800 m away
• Penrhiwceiber

  |

  1.2 km away
• Fernhill

  |

  2.0 km away

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