12 Heol Maes Eirwg, St Mellons, Cardiff, CF3 0AR
About 12 Heol Maes Eirwg
12 Heol Maes Eirwg is a mid-terrace house in St. Mellons, Cardiff, Cardiff (CF3 0AR). It has a recorded floor area of 64 m² (around 689 sq ft), construction records dating it to 1991-1995 and council tax band B. The latest certificate (May 2025) returns a B (score 84), comfortably above the UK average. When first surveyed in July 2012 the rating was C, the property has climbed 1 band since. Between certificates, roof efficiency went from Good to Very Good, window efficiency went from Average to Good and lighting went from Good to Very Good.
Its energy rating outperforms most of the postcode (better than 84% of similar EPCs).
Energy performance
12 Heol Maes Eirwg's carbon output is low for the local stock.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating controls upgraded for better temperature management
Window efficiency improved
Loft insulation upgraded to recommended levels
Solar PV panels (40 kWp) installed
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Planning history
12 Heol Maes Eirwg 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 Heol Maes Eirwg has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£162,000
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.
Versus other Heol Maes Eirwg homes
12 Heol Maes Eirwg outperforms the street on epc rating by a wide margin.
EPC Rating
84 (B)
Street avg 75 (C)
Floor Area
64 m²
Street avg 76 m²
CO₂ Emissions
1.1 t/year
Street avg 2.2 t/year
Habitable Rooms
3 rooms
Street avg 4 rooms
Similar properties nearby
1 Aspen Close, St Mellons
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1 Caspian Close, St Mellons
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1 Caerleon Close, St Mellons
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1 Brookfield Drive, St Mellons
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1 Caraway Close, St Mellons
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1 Blaina Close, St Mellons
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1 Bulrush Close, St Mellons
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1 Cathcob Close, St Mellons
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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
0.2 km
Clos Gwlad-Yr-Haf — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







