6 Ffordd Williamson, Old St Mellons, Cardiff, CF3 6AE
About 6 Ffordd Williamson
6 Ffordd Williamson is a semi-detached house in Old St. Mellons, Cardiff, Cardiff (CF3 6AE). It has a recorded floor area of 53 m² (around 570 sq ft) and construction records dating it to 2012 onwards. The latest certificate (January 2024) shows a C (score 79), near the top of the C band. Earlier certificates rated it B (December 2017); the latest reading is one band lower. Between certificates, roof efficiency dropped from Very Good to Good and window efficiency dropped from Very Good to Good. The recommended improvements would lift it to A (score 94), a 2-band jump.
On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement.
Energy performance
6 Ffordd Williamson sits at the bottom of the postcode for energy efficiency — meaningful headroom to improve.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Floor insulation added or improved
Low energy lighting percentage decreased
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Planning history
6 Ffordd Williamson 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
6 Ffordd Williamson has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£226,000
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 Ffordd Williamson homes
EPC Rating for 6 Ffordd Williamson lags the street by a wide margin.
EPC Rating
79 (C)
Street avg 83 (B)
Floor Area
53 m²
Street avg 61 m²
CO₂ Emissions
1.2 t/year
Street avg 1.0 t/year
Similar properties nearby
1 Boyce Way, Old St Mellons
CF3 6AB
1 Lewis Crescent, Old St Mellons
CF3 6YQ
1 Ffordd Crabtree, Old St Mellons
CF3 6AN
1 Bridge Terrace, Michaelston Y Fedw
CF3 6YZ
1 Potter Street, Old St Mellons
CF3 6AR
1 Druidstone House, Druidstone Road, Old St Mellons
CF3 6XF
1 Ffordd Williamson, Old St Mellons
CF3 6AE
1 Clos Grehan, Old St Mellons
CF3 6BF
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
St Ederyns — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







