Our Data Sources
21, Lock Street, Mountain Ash has 21 entries in the Land Registry , most recently in July 2015 and a single entry in the EPC database dated May 2015.
We combine this information with that of neighbouring properties to estimate the property attributes and values.
The local information is scored as 2 out of 5 and is considered of medium 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 21, Lock Street, Mountain Ash, we estimate a market value of £196,342 and a rental value of £992 per month when presented in very good decorative order. Should the property require extensive cosmetic improvement, those figures would reduce to £173,903 and £879 per month respectively.
Plot Size
HM Land Registry records the plot of land for 21, Lock Street, Mountain Ash as measuring 100 m2.
That makes it the 31st largest plot in the postcode, where all 33 other houses have recorded plot data.
Energy Efficiency
21, Lock Street, Mountain Ash has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 19 May 2015.
The property is connected to mains gas and has fully double glazed windows. It is heated using Boiler and radiators, mains gas.
Sold Prices
The most recent sale of 21, Lock Street, Mountain Ash completed on 8th July 2015 at £125,000 and was recorded by HM Land Registry as a freehold house.
Since 1995 the property has sold twice.
Values of comparable properties have risen by 99.6% over the period since July 2015.
- Sold Jul 2015£125,000
- Sold Apr 2003£47,000
Similar Properties Sold Nearby
Over the past 2 years 82 properties similar to 21, Lock Street, Mountain Ash have sold within a radius of 1.3 kilometres, per the Land Registry and our network of Estate Agents.
The latest, on the 5th December 2025, was 20, Fife Street, Mountain Ash, CF45 4TU, a freehold house which sold for £170,000.
Read more about house prices in CF45.
- Sold Dec 2025£170,000 | 3 Bed House20, Fife Street, Mountain Ash, CF45 4TU20, Fife Street, Mountain Ash, CF45 4TU
- Sold May 2024£150,000 | 4 Bed House16, Fife Street, Mountain Ash, CF45 4TU16, Fife Street, Mountain Ash, CF45 4TU
- Sold Aug 2021£135,000 | 4 Bed House5, Fife Street, Mountain Ash, CF45 4TU5, Fife Street, Mountain Ash, CF45 4TU
•Nearby is defined as the radius comprising the nearest 2,000 addresses.
More reading links
Location Comparison
Of the 82 addresses on Lock Street, Abercynon, Mountain Ash, CF45, 21, Lock Street, Mountain Ash comes out as the 8th largest and the 11th most expensive in our analysis of the public data.
It is also £27k more expensive than the average property across the CF45 district.
More reading links
Schools Nearby
Public Transport Nearby
- Abercynon|600 m away
- Quakers Yard|1.3 km away
- Penrhiwceiber|3.5 km away
Available Internet Speeds
Broadband here reaches superfast speeds, based on recent Ofcom data.
According to recent data from Ofcom, Superfast Broadband is available in the area.
Risk of Flooding
The flood risk here is rated Very Low, based on Environment Agency data.
