Our Data Sources
21, Duffryn Avenue, Cardiff has no recent1 records in the Land Registry and a single entry in the EPC database dated June 2026.
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.
1Sales dated prior to 2007 are shown, but are not used in our calculations.
Price Range & Condition
Decorative condition can have a big effect on a property's value and this effect varies depending on the type, size and location of the property.
If 21, Duffryn Avenue, Cardiff is in very good condition we estimate a sale value of £542,373 and a rental value of £1,743 per month.
However, if the property needs a lot of cosmetic work we estimate a sale value of £480,387 and a rental value of £1,544 per month.
Plot Size
According to data from HM Land Registry, 21, Duffryn Avenue, Cardiff sits on a plot of 266 m2.
We have plot size data on 21 out of 21 other houses in the postcode and 21, Duffryn Avenue, Cardiff sits on the 21st largest plot.
Energy Efficiency
21, Duffryn Avenue, Cardiff has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 02 Jun 2026.
The property is connected to mains gas and has fully double glazed windows. It is heated using a boiler and radiators (mains gas).
Sold Prices
According to HM Land Registry, 21, Duffryn Avenue, Cardiff was last sold on 13th October 1997 for £105,000 and was recorded as a freehold house.
The property has only had this single sale since 1995.
- Sold Oct 1997£105,000
Similar Properties Sold Nearby
According to the Land Registry and our network of Estate Agents, there have been 69 sales of properties similar to 21, Duffryn Avenue, Cardiff within a radius of 640 metres since 2015.
The most recent example is 7, Lakeside Drive, Cardiff, CF23 6DD, a freehold house which sold for £535,000 on the 6th October 2025.
Read more about house prices in CF23.
- Sold Oct 2025£535,000 | 4 Bed House7, Lakeside Drive, Cardiff, CF23 6DD7, Lakeside Drive, Cardiff, CF23 6DD
- Sold Aug 2025£605,000 | 4 Bed House10, Lakeside Drive, Cardiff, CF23 6DD10, Lakeside Drive, Cardiff, CF23 6DD
- Sold Jul 2024£451,700 | 4 Bed House62, Ogwen Drive, Cardiff, CF23 6LL62, Ogwen Drive, Cardiff, CF23 6LL
- Sold Jun 2023£490,000 | 4 Bed House41, Ogwen Drive, Cardiff, CF23 6LH41, Ogwen Drive, Cardiff, CF23 6LH
- Sold Mar 2022£525,000 | 4 Bed House15, Leven Close, Cardiff, CF23 6DN15, Leven Close, Cardiff, CF23 6DN
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 £491,162, ranging from £432,413 to £599,948.
- 17 Duffryn Avenue
4 Bed House | 30 m | Est. Value: £439,831
- 20 Padarn Close
4 Bed House | 31 m | Est. Value: £515,936
- 22 Padarn Close
4 Bed House | 32 m | Est. Value: £537,281
- 27 Duffryn Avenue
5 Bed House | 36 m | Est. Value: £599,948
- 16 Padarn Close
3 Bed House | 36 m | Est. Value: £434,548
Location Comparison
Duffryn Avenue, Cardiff, CF23 has a total of 52 addresses. According to our analysis of all the public data, 21, Duffryn Avenue, Cardiff is the 14th largest and the 26th most expensive property on the street.
When compared to the postcode district it is £153k more expensive than the average property in CF23.
More reading links
Schools Nearby
Public Transport Nearby
- Heath High Level|700 m away
- Heath Low Level|800 m away
- Ty Glas|1.8 km away
Available Internet Speeds
According to recent data from Ofcom, Superfast Broadband is available in this area.
According to recent data from Ofcom, Superfast Broadband available in this area.
Risk of Flooding
According to data from the Environment Agency, the flood risk in this area is considered to be Very Low.
