1 Duffryn Avenue, Cardiff, CF23 6LE
About 1 Duffryn Avenue
1 Duffryn Avenue is a four-bedroom semi-detached house in Cardiff (CF23 6LE). It has a recorded floor area of 92 m² (around 990 sq ft), construction records dating it to 1950-1966 and council tax band F. The latest certificate (August 2021) shows an E (score 47), well below the UK norm with real room to improve. The recommended improvements would lift it to C (score 80), a 2-band jump. Main heating runs on electricity.
One planning record on file: an extension approved in 2023. Past consents include an extension, meaningful when judging how the property has evolved. At 92 m² it's 16% smaller than the typical home in the postcode (110 m² median across 6 EPCs). It lags the bulk of the postcode on energy efficiency (less efficient than 83% of similar EPCs). Today's modelled estimate of £488,000 is 33.7% above the 2021 sale price. On a £-per-square-foot basis, the last sale (£369/sq ft) was about 32.4% above the typical sold price in the postcode. Sold November 2021 for £365,000. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.
What this property has
Inside
- Bedrooms4
Outside
- GarageYes
Building
- RefurbishedYes
Energy performance
1 Duffryn Avenue's carbon output runs well above what efficient homes in the postcode produce.
EPC Rating
Get a survey for this property
Level 3 Building Survey
Because the property has no mains gas supply, we believe a Level 3 building survey should be considered.
From £1,020 · Includes VAT
Planning history
1 Duffryn Avenue has an approved extension on the planning record.
1 application on record at 1 Duffryn Avenue, Cardiff, CF23 6LE
- Jan 2023ExtensionFullOutcome in report
PROPOSED FRONT AND REAR SINGLE STOREY EXTENSIONS
- Documents
- 13 docs on file
- Reference
- 22/01561/DCH
Unlock 1 Duffryn Avenue, Cardiff, CF23 6LE's full planning history
You're seeing the shape of it. The report has the substance.
- Every decision — granted, refused or withdrawn (1 on record)
- All 1 application on this property in full, plus 1 notable nearby
- The 13 documents, officer reports & conditions
- What the pattern means for extending or converting here
One time fee only - money back guarantee
Sales history & valuation
The latest sale landed in the post-pandemic price surge — useful context when reading the figure.
£488,000
Modelled from EPC, postcode comparables.
£365,000
Recorded with HM Land Registry.
Sales timeline
8 November 2021Most recent
£365,000
Median price across the last 5 sales in CF23 6LE: £440,000 (2023–2016).
Nearby sales in CF23 6LE
Versus other Duffryn Avenue homes
1 Duffryn Avenue is notably below the street on floor area.
Price per m²
£3,967
Street avg £3,236
Floor Area
92 m²
Street avg 147 m²
Habitable Rooms
5 rooms
Street avg 6 rooms
CO₂ Emissions
7.0 t/year
Street avg 5.7 t/year
Similar properties nearby
1 Celyn Grove
CF23 6SH
1 Alderbrook, Cyncoed
CF23 6QD
1 Dan Y Coed Rise
CF23 6NN
1 Glenwood
CF23 6UR
1 Dan Y Coed Close
CF23 6NJ
1 Cefn Coed Avenue
CF23 6HE
1 Dan Yr Heol
CF23 6JU
1 Brynderwen Close
CF23 6BR
The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
9/mo
Rising year-on-year across the wider district.
Nearest stop
0.1 km
Duffryn Avenue — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







