25, Navigation Street, Mountain Ash has an Energy Performance Rating (EPC) of E. This is based on the most recent assessment, dated 10 Feb 2014.

The property is not 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, 25, Navigation Street, Mountain Ash was last sold on 9th April 2021 for £55,000 and was recorded as a leasehold flat.

The property has only had this single sale since 1995.

Since April 2021, the market for similar properties has risen by 39.4%.

• Sold Apr 2021£55,000

According to the Land Registry and our network of Estate Agents, there have been 846 property sales within 600 metres of 25, Navigation Street, Mountain Ash since 2007.

The most recent example is 28, The Poplars, Mountain Ash, CF45 4BP, a leasehold flat which sold for £70,000 on the 12th December 2025.

Read more about house prices in CF45.

• Sold Dec 2025£70,000 | 3 Bed Flat28, The Poplars, Mountain Ash, CF45 4BP28, The Poplars, Mountain Ash, CF45 4BP
• Sold Nov 2025£95,000 | 3 Bed House2, The Poplars, Mountain Ash, CF45 4LB2, The Poplars, Mountain Ash, CF45 4LB
• Sold Oct 2024£125,000 | 3 Bed House2, Navigation Street, Mountain Ash, CF45 4BW2, Navigation Street, Mountain Ash, CF45 4BW
• Sold Aug 2023£155,000 | 3 Bed House12, Navigation Street, Mountain Ash, CF45 4BW12, Navigation Street, Mountain Ash, CF45 4BW
• Sold Aug 2023£99,000 | 3 Bed House19, Navigation Street, Mountain Ash, CF45 4BW19, Navigation Street, Mountain Ash, CF45 4BW
• Sold Sep 2022£85,000 | 3 Bed House17, Navigation Street, Mountain Ash, CF45 4BW17, Navigation Street, Mountain Ash, CF45 4BW
• Sold Oct 2021£73,500 | 2 Bed Flat28, Navigation Street, Mountain Ash, CF45 4BW28, Navigation Street, Mountain Ash, CF45 4BW
• Sold Jul 2021£74,000 | 2 Bed Flat39, The Poplars, Mountain Ash, CF45 4BP39, The Poplars, Mountain Ash, CF45 4BP
• Sold Feb 2020£158,000 | 3 Bed House24, Navigation Street, Mountain Ash, CF45 4BW24, Navigation Street, Mountain Ash, CF45 4BW
• Sold Nov 2018£50,000 | 3 Bed House30, The Poplars, Mountain Ash, CF45 4BP30, The Poplars, Mountain Ash, CF45 4BP
• Sold May 2017£56,000 | 2 Bed Flat37, The Poplars, Mountain Ash, CF45 4BP37, The Poplars, Mountain Ash, CF45 4BP
• Sold Mar 2015£80,000 | 3 Bed House22, London Street, Mountain Ash, CF45 4BN22, London Street, Mountain Ash, CF45 4BN
• Sold Aug 2012£49,000 | 3 Bed House15, Navigation Street, Mountain Ash, CF45 4BW15, Navigation Street, Mountain Ash, CF45 4BW
• Sold May 2012£87,000 | 3 Bed House3, Navigation Street, Mountain Ash, CF45 4BW3, Navigation Street, Mountain Ash, CF45 4BW
• Sold Mar 2012£40,000 | 3 Bed Flat29, The Poplars, Mountain Ash, CF45 4BP29, The Poplars, Mountain Ash, CF45 4BP
• Sold Mar 2012£40,000 | 2 Bed Flat24, The Poplars, Mountain Ash, CF45 4BP24, The Poplars, Mountain Ash, CF45 4BP
• Sold Jun 2011£76,895 | 3 Bed House13, Navigation Street, Mountain Ash, CF45 4BW13, Navigation Street, Mountain Ash, CF45 4BW
• Sold Mar 2009£56,000 | 3 Bed House34, The Poplars, Mountain Ash, CF45 4BP34, The Poplars, Mountain Ash, CF45 4BP
• Sold Nov 2007£65,000 | 3 Bed House9, Navigation Street, Mountain Ash, CF45 4BW9, Navigation Street, Mountain Ash, CF45 4BW
• Sold Oct 2007£95,000 | 3 Bed House20, London Street, Mountain Ash, CF45 4BN20, London Street, Mountain Ash, CF45 4BN

Navigation Street, Mountain Ash, CF45 has a total of 28 addresses. According to our analysis of all the public data, 25, Navigation Street, Mountain Ash is the 28th largest and the 28th most expensive property on the street.

When compared to the postcode district it is £88k less expensive than the average property in CF45.

• Mountain Ash

  |

  300 m away
• Fernhill

  |

  1.4 km away
• Penrhiwceiber

  |

  1.9 km away

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