Our Data Sources
20, St. John Avenue, Cardiff has a single entry in the Land Registry from January 2024 and a single entry in the EPC database dated January 2024.
We combine this information with that 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.
Price Range & Condition
In very good condition, we estimate 20, St. John Avenue, Cardiff would be worth £469,461, with a potential rental value of £2,236 per month.
If substantial cosmetic improvements are needed, the estimated sale value falls to £415,809, with a rental value of £1,980 per month.
The extent to which decoration affects a property's value depends on its type, size and location.
Energy Efficiency
20, St. John Avenue, Cardiff has an Energy Performance Rating (EPC) of B. This is based on the most recent assessment, dated 09 Jan 2024.
The property is not connected to mains gas and has high performance glazing. It is heated using Boiler and radiators, mains gas.
Sold Prices
20, St. John Avenue, Cardiff last changed hands on 29th January 2024, selling for £448,995. The transaction was logged as a freehold house by HM Land Registry.
That is its only recorded sale since 1995.
The market for similar properties has risen by 4.8% since January 2024.
- Sold Jan 2024£448,995
Similar Properties Sold Nearby
Land Registry records and our Estate Agent network show 323 sales of comparable properties within 780 metres of 20, St. John Avenue, Cardiff across the last 2 years.
Most recently, 13, St. John Avenue, Cardiff, CF15 8GS, a freehold house, sold at £468,995 on the 30th April 2025.
Read more about house prices in CF15.
- Sold Apr 2025£468,995 | 4 Bed House13, St. John Avenue, Cardiff, CF15 8GS13, St. John Avenue, Cardiff, CF15 8GS
- Sold Mar 2024£454,995 | 4 Bed House14, St. John Avenue, Cardiff, CF15 8GS14, St. John Avenue, Cardiff, CF15 8GS
- Sold Jan 2024£454,995 | 4 Bed House18, St. John Avenue, Cardiff, CF15 8GS18, St. John Avenue, Cardiff, CF15 8GS
•Nearby is defined as the radius comprising the nearest 2,000 addresses.
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Location Comparison
Our analysis of the public data ranks 20, St. John Avenue, Cardiff as the 15th largest and the 10th most expensive of the 50 addresses on St. John Avenue, Radyr, Cardiff, CF15.
Against the CF15 postcode district average, it is £54k more expensive than the typical property.
More reading links
Schools Nearby
Public Transport Nearby
- Radyr|900 m away
- Danescourt|1.5 km away
- Llandaf|1.6 km away
Risk of Flooding
Environment Agency data suggests this area has a Very Low risk of flooding.












