HM Land Registry records the plot of land for 18, Ash Grove, Mountain Ash as measuring 248 m².

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

18, Ash Grove, Mountain Ash has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 23 Jun 2026.

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

Since 2020 176 properties similar to 18, Ash Grove, Mountain Ash have sold within a radius of 690 metres, per the Land Registry and our network of Estate Agents.

The latest, on the 31st March 2026, was 61, Tanycoed Street, Mountain Ash, CF45 3YH, a freehold house which sold for £72,500.

Read more about house prices in CF45.

• Sold Mar 2026£72,500 | 3 Bed House61, Tanycoed Street, Mountain Ash, CF45 3YH61, Tanycoed Street, Mountain Ash, CF45 3YH
• Sold Jan 2026£100,000 | 3 Bed House30, Penybryn Terrace, Mountain Ash, CF45 3TJ30, Penybryn Terrace, Mountain Ash, CF45 3TJ
• Sold Dec 2025£79,250 | 3 Bed House67, Woodfield Terrace, Mountain Ash, CF45 3YA67, Woodfield Terrace, Mountain Ash, CF45 3YA
• Sold Nov 2025£116,000 | 3 Bed House55, Park Street, Mountain Ash, CF45 3YW55, Park Street, Mountain Ash, CF45 3YW
• Sold Jul 2025£75,000 | 3 Bed House85, Woodfield Terrace, Mountain Ash, CF45 3YA85, Woodfield Terrace, Mountain Ash, CF45 3YA
• Sold Jul 2025£63,000 | 3 Bed House44, Park Street, Mountain Ash, CF45 3YL44, Park Street, Mountain Ash, CF45 3YL
• Sold Jun 2025£115,000 | 3 Bed House72, Woodfield Terrace, Mountain Ash, CF45 3UU72, Woodfield Terrace, Mountain Ash, CF45 3UU
• Sold May 2025£77,500 | 3 Bed House31, Penybryn Terrace, Mountain Ash, CF45 3TJ31, Penybryn Terrace, Mountain Ash, CF45 3TJ
• Sold May 2025£37,000 | 3 Bed House123, Penrhiwceiber Road, Mountain Ash, CF45 3SG123, Penrhiwceiber Road, Mountain Ash, CF45 3SG
• Sold Mar 2025£71,000 | 3 Bed House149, Penrhiwceiber Road, Mountain Ash, CF45 3SG149, Penrhiwceiber Road, Mountain Ash, CF45 3SG
• Sold Jan 2025£82,500 | 3 Bed House140, Penrhiwceiber Road, Mountain Ash, CF45 3SH140, Penrhiwceiber Road, Mountain Ash, CF45 3SH
• Sold Oct 2024£80,000 | 3 Bed House186, Penrhiwceiber Road, Mountain Ash, CF45 3SH186, Penrhiwceiber Road, Mountain Ash, CF45 3SH
• Sold Oct 2024£117,500 | 3 Bed House89, Woodfield Terrace, Mountain Ash, CF45 3YA89, Woodfield Terrace, Mountain Ash, CF45 3YA
• Sold Sep 2024£103,000 | 3 Bed House18, Park Street, Mountain Ash, CF45 3YL18, Park Street, Mountain Ash, CF45 3YL
• Sold Jul 2024£86,500 | 3 Bed House37, Tanycoed Street, Mountain Ash, CF45 3YH37, Tanycoed Street, Mountain Ash, CF45 3YH
• Sold Feb 2024£56,500 | 3 Bed House83, Woodfield Terrace, Mountain Ash, CF45 3YA83, Woodfield Terrace, Mountain Ash, CF45 3YA
• Sold Sep 2023£50,000 | 3 Bed House12, Dilwyn Street, Mountain Ash, CF45 3YG12, Dilwyn Street, Mountain Ash, CF45 3YG
• Sold Feb 2023£90,000 | 3 Bed House43, Woodfield Terrace, Mountain Ash, CF45 3YA43, Woodfield Terrace, Mountain Ash, CF45 3YA
• Sold Jan 2023£84,000 | 3 Bed House11, Park Street, Mountain Ash, CF45 3YW11, Park Street, Mountain Ash, CF45 3YW
• Sold Dec 2020£83,000 | 3 Bed House33, Tanycoed Street, Mountain Ash, CF45 3YH33, Tanycoed Street, Mountain Ash, CF45 3YH

Of the 18 addresses on Ash Grove, Mountain Ash, CF45, 18, Ash Grove, Mountain Ash comes out as the 8th largest and the 8th most expensive in our analysis of the public data.

It is also £68k less expensive than the average property across the CF45 district.

• Penrhiwceiber

  |

  600 m away
• Mountain Ash

  |

  1.4 km away
• Fernhill

  |

  2.6 km away

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