According to data from HM Land Registry, 15, Navigation Street, Mountain Ash sits on a plot of 140 m².

We have plot size data on 18 out of 24 other houses in the postcode and 15, Navigation Street, Mountain Ash sits on the 4th largest plot.

15, Navigation Street, Mountain Ash has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 03 Dec 2022.

The property is 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, 15, Navigation Street, Mountain Ash was last sold on 17th August 2012 for £49,000 and was recorded as a freehold house.

The property has only had this single sale since 1995.

Since August 2012, the market for similar properties has risen by 89.3%.

• Sold Aug 2012£49,000

According to the Land Registry and our network of Estate Agents, there have been 158 sales of properties similar to 15, Navigation Street, Mountain Ash within a radius of 620 metres since 2019.

The most recent example is 50, Phillip Street, Mountain Ash, CF45 4BG, a freehold house which sold for £125,000 on the 4th July 2025.

Read more about house prices in CF45.

• Sold Jul 2025£125,000 | 3 Bed House50, Phillip Street, Mountain Ash, CF45 4BG50, Phillip Street, Mountain Ash, CF45 4BG
• Sold Apr 2025£120,000 | 3 Bed House22, Allen Street, Mountain Ash, CF45 4BD22, Allen Street, Mountain Ash, CF45 4BD
• Sold Apr 2025£82,600 | 3 Bed House54, Arnold Street, Mountain Ash, CF45 4LF54, Arnold Street, Mountain Ash, CF45 4LF
• Sold Oct 2024£80,000 | 3 Bed House18, Phillip Street, Mountain Ash, CF45 4BE18, Phillip Street, Mountain Ash, CF45 4BE
• Sold Oct 2024£125,000 | 3 Bed House2, Navigation Street, Mountain Ash, CF45 4BW2, Navigation Street, Mountain Ash, CF45 4BW
• Sold Jul 2024£140,000 | 3 Bed House26, Phillip Street, Mountain Ash, CF45 4BE26, Phillip Street, Mountain Ash, CF45 4BE
• Sold May 2024£138,500 | 3 Bed House42, Phillip Street, Mountain Ash, CF45 4BG42, Phillip Street, Mountain Ash, CF45 4BG
• Sold Nov 2023£90,000 | 3 Bed House57, Arnold Street, Mountain Ash, CF45 4LF57, Arnold Street, Mountain Ash, CF45 4LF
• Sold Oct 2023£125,100 | 3 Bed House21, Phillip Street, Mountain Ash, CF45 4BE21, Phillip Street, Mountain Ash, CF45 4BE
• Sold Aug 2023£99,000 | 3 Bed House19, Navigation Street, Mountain Ash, CF45 4BW19, Navigation Street, Mountain Ash, CF45 4BW
• Sold Jun 2023£117,500 | 3 Bed House21, Copley Street, Mountain Ash, CF45 4AS21, Copley Street, Mountain Ash, CF45 4AS
• Sold Apr 2023£116,000 | 3 Bed House33, Arnold Street, Mountain Ash, CF45 4LF33, Arnold Street, Mountain Ash, CF45 4LF
• Sold Aug 2022£135,000 | 3 Bed House15, Arnold Street, Mountain Ash, CF45 4LF15, Arnold Street, Mountain Ash, CF45 4LF
• Sold Jul 2022£135,000 | 3 Bed House17, Allen Street, Mountain Ash, CF45 4BD17, Allen Street, Mountain Ash, CF45 4BD
• Sold May 2022£92,500 | 3 Bed House16, Copley Street, Mountain Ash, CF45 4AS16, Copley Street, Mountain Ash, CF45 4AS
• Sold Mar 2022£68,000 | 3 Bed House75, Phillip Street, Mountain Ash, CF45 4BG75, Phillip Street, Mountain Ash, CF45 4BG
• Sold Oct 2021£99,000 | 3 Bed House41, Phillip Street, Mountain Ash, CF45 4BG41, Phillip Street, Mountain Ash, CF45 4BG
• Sold Mar 2021£57,500 | 3 Bed House43, Phillip Street, Mountain Ash, CF45 4BG43, Phillip Street, Mountain Ash, CF45 4BG
• Sold Nov 2020£65,000 | 3 Bed House23, Arnold Street, Mountain Ash, CF45 4LF23, Arnold Street, Mountain Ash, CF45 4LF
• Sold Oct 2019£83,000 | 3 Bed House14, Arnold Street, Mountain Ash, CF45 4LF14, Arnold Street, Mountain Ash, CF45 4LF

Navigation Street, Mountain Ash, CF45 has a total of 28 addresses. According to our analysis of all the public data, 15, Navigation Street, Mountain Ash is the 22nd largest and the 22nd most expensive property on the street.

When compared to the postcode district it is £33k 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.