Our Data Sources
12, Castle Avenue, Cardiff has a single entry in the Land Registry from August 2013 and a single entry in the EPC database dated October 2012.
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
In very good condition, we estimate 12, Castle Avenue, Cardiff would be worth £249,459, with a potential rental value of £1,348 per month.
If substantial cosmetic improvements are needed, the estimated sale value falls to £220,949, with a rental value of £1,194 per month.
The extent to which decoration affects a property's value depends on its type, size and location.
Plot Size
12, Castle Avenue, Cardiff occupies a 171 m2 plot as recorded by HM Land Registry.
All 13 other houses in this postcode have recorded plot sizes, and this one ranks as the 10th largest.
Energy Efficiency
12, Castle Avenue, Cardiff has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 05 Oct 2012.
The property is not connected to mains gas and has fully double glazed windows. It is heated using a boiler and radiators (mains gas).
Sold Prices
12, Castle Avenue, Cardiff last changed hands on 30th August 2013, selling for £125,000. 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 46.5% since August 2013.
- Sold Aug 2013£125,000
Similar Properties Sold Nearby
Land Registry records and our Estate Agent network show 85 sales of comparable properties within 830 metres of 12, Castle Avenue, Cardiff since 2009.
Most recently, 25, Northlands, Cardiff, CF3 3AQ, a freehold house, sold at £250,000 on the 20th March 2026.
Read more about house prices in CF3.
- Sold Mar 2026£250,000 | 3 Bed House25, Northlands, Cardiff, CF3 3AQ25, Northlands, Cardiff, CF3 3AQ
- Sold Dec 2025£280,000 | 3 Bed House6, Brachdy Lane, Cardiff, CF3 3AS6, Brachdy Lane, Cardiff, CF3 3AS
- Sold Nov 2025£280,000 | 3 Bed House5, Northlands, Cardiff, CF3 3AQ5, Northlands, Cardiff, CF3 3AQ
- Sold Nov 2025£258,000 | 2 Bed House2, Cwrt Coles, Cardiff, CF24 2RY2, Cwrt Coles, Cardiff, CF24 2RY
- Sold Sep 2025£250,000 | 3 Bed House71, Wentloog Road, Cardiff, CF3 3HD71, Wentloog Road, Cardiff, CF3 3HD
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 £262,556, ranging from £127,951 to £390,884.
- 8 Castle Avenue
3 Bed House | 10 m | Est. Value: £243,464
- 6 Castle Avenue
3 Bed House | 15 m | Est. Value: £267,444
- 9 Castle Avenue
3 Bed House | 22 m | Est. Value: £253,414
- 7 Castle Avenue
3 Bed House | 23 m | Est. Value: £265,633
- 4 Castle Avenue
3 Bed House | 24 m | Est. Value: £248,003
Location Comparison
Our analysis of the public data ranks 12, Castle Avenue, Cardiff as the 13th largest and the 13th most expensive of the 13 addresses on Castle Avenue, Rumney, Cardiff, CF3.
Against the CF3 postcode district average, it is £20k less expensive than the typical property.
More reading links
Schools Nearby
Public Transport Nearby
- Cathays|3.1 km away
- Cardiff Queen Street|3.1 km away
- Heath Low Level|3.3 km away
Available Internet Speeds
Ofcom's latest figures show ultrafast broadband available in this area.
According to recent data from Ofcom, Ultrafast Broadband available in this area.
Risk of Flooding
Environment Agency data suggests this area has a Very Low risk of flooding.
