Our Data Sources
11, Union Street, Mountain Ash has a single entry in the Land Registry from October 2007 and no records in the EPC database.
We combine this sold price information with public data of neighbouring properties to estimate the 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 11, Union Street, Mountain Ash, we estimate a market value of £71,903 and a rental value of £511 per month when presented in very good decorative order. Should the property require extensive cosmetic improvement, those figures would reduce to £63,685 and £453 per month respectively.
Plot Size
HM Land Registry records the plot of land for 11, Union Street, Mountain Ash as measuring 104 m2.
That makes it the largest plot in the postcode, where 8 of the 11 other houses have recorded plot data.
Sold Prices
The most recent sale of 11, Union Street, Mountain Ash completed on 16th October 2007 at £75,000 and was recorded by HM Land Registry as a freehold house.
Since 1995 this is the property's only sale.
Values of comparable properties have risen by 87.6% over the period since October 2007.
- Sold Oct 2007£75,000
Similar Properties Sold Nearby
Since 2007 5 properties similar to 11, 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 28th March 2025, was 57, High Street, Mountain Ash, CF45 3PE, a freehold house which sold for £75,000.
Read more about house prices in CF45.
- Sold Mar 2025£75,000 | 3 Bed House57, High Street, Mountain Ash, CF45 3PE57, High Street, Mountain Ash, CF45 3PE
- Sold Nov 2021£59,000 | 3 Bed House10, Union Street, Mountain Ash, CF45 3NY10, Union Street, Mountain Ash, CF45 3NY
- Sold Nov 2017£64,500 | 3 Bed House35, High Street, Mountain Ash, CF45 3PE35, High Street, Mountain Ash, CF45 3PE
- Sold Oct 2017£58,000 | 3 Bed House45, High Street, Mountain Ash, CF45 3PE45, High Street, Mountain Ash, CF45 3PE
- Sold Jul 2007£65,000 | 3 Bed House50, High Street, Mountain Ash, CF45 3PE50, High Street, Mountain Ash, CF45 3PE
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 £83,337, ranging from £52,496 to £109,982.
- 12 Union Street
3 Bed House | 4 m | Est. Value: £55,216
- 10 Union Street
3 Bed House | 5 m | Est. Value: £66,558
- 9 Union Street
3 Bed House | 9 m | Est. Value: £58,266
- 13 Union Street
2 Bed House | 10 m | Est. Value: £52,496
- 29 Duffryn Street
2 Bed House | 11 m | Est. Value: £84,277
Location Comparison
Of the 11 addresses on Union Street, Mountain Ash, CF45, 11, Union Street, Mountain Ash comes out as the largest and the most expensive in our analysis of the public data.
It is also £92k 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.












