Our Data Sources
8, Union Street, Mountain Ash has no records in the Land Registry and a single entry in the EPC database dated January 2024.
We combine this information with public data of neighbouring properties to estimate the property attributes and values.
The local information is scored as 1 out of 5 and is considered of low accuracy.
Price Range & Condition
The condition of a property plays an important role in determining its value, with the degree of impact varying by property type, size and location.
For 8, Union Street, Mountain Ash, we estimate a market value of £59,065 and a rental value of £447 per month when presented in very good decorative order. Should the property require extensive cosmetic improvement, those figures would reduce to £52,314 and £396 per month respectively.
Plot Size
HM Land Registry records the plot of land for 8, Union Street, Mountain Ash as measuring 32 m2.
That makes it the 8th largest plot in the postcode, where 8 of the 11 other houses have recorded plot data.
Energy Efficiency
8, Union Street, Mountain Ash has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 13 Jan 2024.
The property is connected to mains gas and has fully double glazed windows. It is heated using a boiler and radiators (mains gas).
Similar Properties Sold Nearby
Since 2014 8 properties similar to 8, Union Street, Mountain Ash have sold within a radius of 510 metres, per the Land Registry and our network of Estate Agents.
The latest, on the 24th October 2025, was 9, Union Street, Mountain Ash, CF45 3NY, a freehold house which sold for £90,000.
Read more about house prices in CF45.
- Sold Oct 2025£90,000 | 3 Bed House9, Union Street, Mountain Ash, CF45 3NY9, Union Street, Mountain Ash, CF45 3NY
- Sold Nov 2020£50,000 | 2 Bed House61, High Street, Mountain Ash, CF45 3PE61, High Street, Mountain Ash, CF45 3PE
- Sold Sep 2020£53,000 | 2 Bed House54, High Street, Mountain Ash, CF45 3PE54, High Street, Mountain Ash, CF45 3PE
- Sold Jan 2020£36,000 | 2 Bed House62, High Street, Mountain Ash, CF45 3PE62, High Street, Mountain Ash, CF45 3PE
- Sold Dec 2017£34,000 | 3 Bed House12, Union Street, Mountain Ash, CF45 3NY12, Union Street, Mountain Ash, CF45 3NY
Nearby is defined as the radius comprising the nearest 2,000 addresses.
More reading links
Explore Nearby Properties
The surrounding properties have an average estimated value of £78,467, ranging from £52,496 to £109,982.
- 7 Union Street
2 Bed House | 4 m | Est. Value: £53,021
- 9 Union Street
3 Bed House | 4 m | Est. Value: £58,266
- 10 Union Street
3 Bed House | 9 m | Est. Value: £66,558
- 11 Union Street
3 Bed House | 14 m | Est. Value: £68,479
- 14 Union Street
3 Bed House | 14 m | Est. Value: £56,763
Location Comparison
Of the 11 addresses on Union Street, Mountain Ash, CF45, 8, Union Street, Mountain Ash comes out as the 7th largest and the 7th most expensive in our analysis of the public data.
It is also £104k less expensive than the average property across the CF45 district.
More reading links
Schools Nearby
Public Transport Nearby
- Mountain Ash|400 m away
- Fernhill|1.1 km away
- Penrhiwceiber|2.1 km away
Risk of Flooding
The flood risk here is rated Very Low, based on Environment Agency data.
