12 Mallard Close, St Mellons, Cardiff, CF3 0AJ
About 12 Mallard Close
12 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 1976-1982 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 (July 2017) shows a C (score 75), near the top of the C band. The rating has held steady at C across 3 certificates since August 2010. Between certificates, roof efficiency went from Average to Good; while hot-water efficiency dropped from Very Good to Good and main heating dropped from Very Good to Good.
At 48 m² it's 28.9% smaller than the typical home in the postcode (68 m² median across 12 EPCs).
Energy performance
12 Mallard Close's carbon output is low for the local stock.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Hot water efficiency decreased
Roof insulation improved
Loft insulation upgraded to recommended levels
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Planning history
12 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
12 Mallard Close has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£119,000
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
12 Mallard Close outperforms the street on co₂ emissions by a wide margin.
EPC Rating
75 (C)
Street avg 75 (C)
Floor Area
48 m²
Street avg 48 m²
CO₂ Emissions
1.4 t/year
Street avg 1.6 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.







