5 Mallard Close, St Mellons, Cardiff, CF3 0AJ
About 5 Mallard Close
5 Mallard Close is an end-of-terrace house in St. Mellons, Cardiff, Cardiff (CF3 0AJ). It has a recorded floor area of 77 m² (around 829 sq ft), construction records dating it to 1976-1982 and council tax band B. The latest certificate (July 2026) shows a C (score 74). The rating has held steady at C across 4 certificates since March 2014. Between certificates, roof efficiency went from Poor to Average; while window efficiency dropped from Good to Average. This certificate was lodged in the last six months, so the rating reflects current condition.
At 77 m² the property is well over the postcode median (53 m² across 12 EPCs), placing it in the larger end of the local stock.
Energy performance
The EPC has just been inspected, so the rating reflects current condition.
EPC Rating
Certificate validity
Valid until 15 July 2036
Property Improvements
Changes detected from historical EPC data
Heating controls changed
Roof insulation improved
Heating controls upgraded for better temperature management
Loft insulation upgraded to recommended levels
More low energy lighting installed
Solar PV panels (26 kWp) installed
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Planning history
5 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
5 Mallard Close has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£173,000
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
Habitable Rooms for 5 Mallard Close lags the street by a wide margin.
EPC Rating
74 (C)
Street avg 79 (C)
Floor Area
77 m²
Street avg 82 m²
CO₂ Emissions
1.8 t/year
Street avg 1.8 t/year
Habitable Rooms
4 rooms
Street avg 5 rooms
Similar properties nearby
1 Aspen Close, St Mellons
CF3 0BT
1 Caspian Close, St Mellons
CF3 0BQ
1 Caerleon Close, St Mellons
CF3 0HH
1 Ashfield Court, St Mellons
CF3 0AE
1 Bulrush Close, St Mellons
CF3 0AZ
1 Caraway Close, St Mellons
CF3 0NF
1 Blaina Close, St Mellons
CF3 0EB
1 Broadwell Close, St Mellons
CF3 0HU
The neighbourhood at a glance
Crime
242/mo
Falling 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.







