31 Duffryn Avenue, Cardiff, CF23 6LE
About 31 Duffryn Avenue
31 Duffryn Avenue is a three-bedroom detached house in Cardiff (CF23 6LE). It has a recorded floor area of 97 m² (around 1044 sq ft), construction records dating it to 1950-1966 and council tax band G. The latest certificate (September 2016) shows a D (score 59), a step below the typical UK home. The recommended improvements would lift it to B (score 83), a 2-band jump.
2 planning records sit against the property, 2 approved, 0 refused. Past consents include an extension, meaningful when judging how the property has evolved. Today's modelled estimate of £522,000 is 49.1% above the 2016 sale price. On a £-per-square-foot basis, the last sale (£335/sq ft) was about 27.4% above the typical sold price in the postcode. Last changed hands 10 years ago, in December 2016.
What this property has
Inside
- Bedrooms3
- Bathrooms1
Outside
- Private gardenYes
- GarageYes
Building
- Heating systemGas
Energy performance
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 15 Sept 2026
EPC Rating
Certificate validity
Expired on 15 September 2026
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Planning history
2 applications on record at 31 Duffryn Avenue, Cardiff, CF23 6LE
- Dec 2016ExtensionFullOutcome in report
DEMOLITION OF GARAGE AND NEW SIDE SINGLE STOREY, DOUBLE REAR EXTENSION.
- Documents
- 6 docs on file
- Reference
- 16/02733/DCH
- More recent applications — locked
- RenovationMar 2017Decision
Unlock 31 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- Every decision — granted, refused or withdrawn (2 on record)
- All 2 applications on this property in full, plus 1 notable nearby
- The 12 documents, officer reports & conditions
- What the pattern means for extending or converting here
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Sales history & valuation
31 Duffryn Avenue valuation sits well clear of the typical sold price in this postcode.
£522,000
Modelled from EPC, postcode comparables.
£350,000
Recorded with HM Land Registry.
Sales timeline
9 December 2016Most recent
£350,000
Median price across the last 5 sales in CF23 6LE: £440,000 (2023–2017).
Nearby sales in CF23 6LE
Versus other Duffryn Avenue homes
31 Duffryn Avenue is notably below the street on habitable rooms.
Price per m²
£3,608
Street avg £2,925
Floor Area
97 m²
Street avg 147 m²
Habitable Rooms
5 rooms
Street avg 6 rooms
CO₂ Emissions
4.6 t/year
Street avg 5.7 t/year
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The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
169/mo
Falling 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.







