Our Data Sources
12, St. John Avenue, Cardiff has no records in the the Land Registry and a single entry in the EPC database dated June 2024.
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.
Price Range & Condition
In very good condition, we estimate 12, 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
12, St. John Avenue, Cardiff has an Energy Performance Rating (EPC) of B. This is based on the most recent assessment, dated 02 Jun 2024.
The property is not connected to mains gas and has high performance glazing. It is heated using Boiler and radiators, mains gas.
Similar Properties Sold Nearby
Land Registry records and our Estate Agent network show 325 sales of comparable properties within 750 metres of 12, 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 Apr 2024£444,995 | 4 Bed House41, St. John Avenue, Cardiff, CF15 8GS41, 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
•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 12, St. John Avenue, Cardiff as the 18th largest and the 13th 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.
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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.












