Our Data Sources
21, Clos Yr Onnen, Cardiff has no records in the the Land Registry and a single entry in the EPC database dated June 2018.
We combine this information with public data of neighbouring properties to estimate the property attributes and values.
The local information is scored as 3 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, Clos Yr Onnen, Cardiff, we estimate a market value of £277,217 and a rental value of £1,473 per month when presented in very good decorative order. Should the property require extensive cosmetic improvement, those figures would reduce to £245,535 and £1,304 per month respectively.
Energy Efficiency
21, Clos Yr Onnen, Cardiff has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 26 Jun 2018.
The property is connected to mains gas and has fully double glazed windows. It is heated using Boiler and radiators, mains gas.
Similar Properties Sold Nearby
Over the past 2 years 3 properties similar to 21, Clos Yr Onnen, Cardiff have sold within a radius of 470 metres, per the Land Registry and our network of Estate Agents.
The latest, on the 7th August 2025, was 6, Thrush Close, Cardiff, CF3 0PE, a freehold house which sold for £225,000.
Read more about house prices in CF3.
- Sold Aug 2025£225,000 | 3 Bed House6, Thrush Close, Cardiff, CF3 0PE6, Thrush Close, Cardiff, CF3 0PE
- Sold Jun 2024£285,000 | 3 Bed House7, Thrush Close, Cardiff, CF3 0PE7, Thrush Close, Cardiff, CF3 0PE
- Sold Jan 2022£220,000 | 3 Bed House50, Jasmine Drive, Cardiff, CF3 0JD50, Jasmine Drive, Cardiff, CF3 0JD
•Nearby is defined as the radius comprising the nearest 2,000 addresses.
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Location Comparison
Of the 23 addresses on Clos Yr Onnen, St. Mellons, Cardiff, CF3, 21, Clos Yr Onnen, Cardiff comes out as the 5th largest and the 5th most expensive in our analysis of the public data.
It is also £8k more expensive than the average property across the CF3 district.
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Schools Nearby
Public Transport Nearby
- 6.0kmHeath High Level
- 6.0kmHeath Low Level
- 6.1kmLlanishen
Available Internet Speeds
Broadband here reaches ultrafast speeds, based on recent Ofcom data.
According to recent data from Ofcom, Ultrafast broadband is available in the area.
Risk of Flooding
The flood risk here is rated very low, based on Environment Agency data.
