Our Data Sources
20, Pentwyn Avenue, Mountain Ash has no recent1 records in the Land Registry and a single entry in the EPC database dated March 2025.
We combine this information with public data of neighbouring properties to estimate the property attributes and values.
The local information is scored as 5 out of 5 and is considered of high accuracy.
1Sales dated prior to 2007 are shown, but are not used in our calculations.
Price Range & Condition
In very good condition, we estimate 20, Pentwyn Avenue, Mountain Ash would be worth £136,762, with a potential rental value of £859 per month.
If substantial cosmetic improvements are needed, the estimated sale value falls to £121,132, with a rental value of £761 per month.
The extent to which decoration affects a property's value depends on its type, size and location.
Plot Size
20, Pentwyn Avenue, Mountain Ash occupies a 190 m2 plot as recorded by HM Land Registry.
Of the 45 other houses in this postcode, 41 have recorded plot sizes, and this one ranks as the 24th largest.
Energy Efficiency
20, Pentwyn Avenue, Mountain Ash has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 20 Mar 2025.
The property is connected to mains gas and has fully double glazed windows. It is heated using a boiler and radiators (mains gas).
Sold Prices
20, Pentwyn Avenue, Mountain Ash last changed hands on 4th April 2001, selling for £13,100. The transaction was logged as a freehold house by HM Land Registry.
In total it has sold twice since 1995.
- Sold Apr 2001£13,100
- Sold Jul 1997£8,000
Similar Properties Sold Nearby
Land Registry records and our Estate Agent network show 157 sales of comparable properties within 1.4 kilometres of 20, Pentwyn Avenue, Mountain Ash since 2007.
Most recently, 52, Pentwyn Avenue, Mountain Ash, CF45 4YF, a freehold house, sold at £30,000 on the 19th June 2026.
Read more about house prices in CF45.
- Sold Jun 2026£30,000 | 3 Bed House52, Pentwyn Avenue, Mountain Ash, CF45 4YF52, Pentwyn Avenue, Mountain Ash, CF45 4YF
- Sold Apr 2026£83,000 | 3 Bed House10, Pentwyn Avenue, Mountain Ash, CF45 4YF10, Pentwyn Avenue, Mountain Ash, CF45 4YF
- Sold Mar 2026£150,000 | 3 Bed House32, Rheola Street, Mountain Ash, CF45 3TB32, Rheola Street, Mountain Ash, CF45 3TB
- Sold Mar 2026£147,000 | 3 Bed House92, Pentwyn Avenue, Mountain Ash, CF45 4YF92, Pentwyn Avenue, Mountain Ash, CF45 4YF
- Sold Feb 2026£95,000 | 3 Bed House11, Glanlay Street, Mountain Ash, CF45 3TL11, Glanlay Street, Mountain Ash, CF45 3TL
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 £96,803, ranging from £78,648 to £141,832.
- 18 Pentwyn Avenue
4 Bed House | 7 m | Est. Value: £141,832
- 24 Pentwyn Avenue
3 Bed House | 17 m | Est. Value: £129,543
- 41 Pentwyn Avenue
3 Bed House | 22 m | Est. Value: £88,782
- 43 Pentwyn Avenue
3 Bed House | 23 m | Est. Value: £90,201
- 37 Pentwyn Avenue
3 Bed House | 24 m | Est. Value: £79,721
Location Comparison
Our analysis of the public data ranks 20, Pentwyn Avenue, Mountain Ash as the 45th largest and the 24th most expensive of the 111 addresses on Pentwyn Avenue, Mountain Ash, CF45.
Against the CF45 postcode district average, it is £33k less expensive than the typical property.
More reading links
Schools Nearby
Public Transport Nearby
- Penrhiwceiber|1.0 km away
- Quakers Yard|2.2 km away
- Mountain Ash|2.7 km away
Available Internet Speeds
Ofcom's latest figures show superfast broadband available in this area.
According to recent data from Ofcom, Superfast Broadband available in this area.
Risk of Flooding
Environment Agency data suggests this area has a Very Low risk of flooding.
