9 Mallard Close, St Mellons, Cardiff, CF3 0AJ
About 9 Mallard Close
9 Mallard Close is a detached house in St. Mellons, Cardiff, Cardiff (CF3 0AJ). It has a recorded floor area of 48 m² (around 517 sq ft), construction records dating it to 1967-1975 and council tax band A. At 48 m² this is the smallest unit on EPC record across the building (48–87 m²). The building's EPC ratings span C to B, with this unit at the bottom. The latest certificate (March 2023) shows a C (score 71). The rating has held steady at C across 2 certificates since January 2009. Between certificates, lighting went from Very Poor to Very Good; while wall efficiency dropped from Good to Average and window efficiency dropped from Good to Average.
At 48 m² it's 28.9% smaller than the typical home in the postcode (68 m² median across 12 EPCs).
Energy performance
EPC Rating
Property Improvements
Changes detected from historical EPC data
Hot water efficiency decreased
More low energy lighting installed
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Planning history
9 Mallard Close has no planning applications on record.
But the area is active
1 notable application nearby — larger schemes and conversions that could reshape the street. The report maps them all.
Sales history & valuation
9 Mallard Close has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£115,000
Modelled from EPC, postcode comparables.
No sales recorded with HM Land Registry
That can mean the property has never traded since the registry began publishing in 1995, was a new build that hasn't been registered yet, or is held in the same hands long-term.
Median price across the last 4 sales in CF3 0AJ: £70,975 (2005–1996).
Versus other Mallard Close homes
EPC Rating for 9 Mallard Close lags the street by a wide margin.
EPC Rating
71 (C)
Street avg 75 (C)
Floor Area
48 m²
Street avg 48 m²
CO₂ Emissions
1.8 t/year
Street avg 1.5 t/year
Habitable Rooms
2 rooms
Street avg 2 rooms
Similar properties nearby
1 Broadlands Court, St Mellons
CF3 0BZ
1 Brookfield Drive, St Mellons
CF3 0BA
1 Caspian Close, St Mellons
CF3 0BQ
1 Aspen Close, St Mellons
CF3 0BT
1 Caerleon Close, St Mellons
CF3 0HH
1 Caraway Close, St Mellons
CF3 0NF
1 Blaina Close, St Mellons
CF3 0EB
1 Bulrush Close, St Mellons
CF3 0AZ
The neighbourhood at a glance
Reported crime in the wider district is trending notably upward year-on-year.
Crime
3/mo
Rising year-on-year across the wider district.
Nearest stop
0.1 km
Tarwick Drive — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







