6 Clos Thomas, Old St Mellons, Cardiff, CF3 6YR
About 6 Clos Thomas
6 Clos Thomas is a semi-detached house in Old St. Mellons, Cardiff, Cardiff (CF3 6YR). It has a recorded floor area of 59 m² (around 635 sq ft). The latest certificate (September 2020) returns a B (score 82), comfortably above the UK average. The recommended improvements would push it to A (score 96).
At 59 m² it's 24.4% smaller than the typical home in the postcode (78 m² median across 44 EPCs). Today's modelled estimate of £244,000 is 22% above the 2020 sale price. Last sale on file: £199,995 in November 2020.
Energy performance
6 Clos Thomas's carbon output is low for the local stock.
EPC Rating
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Planning history
6 Clos Thomas 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
The latest sale landed in the post-pandemic price surge — useful context when reading the figure.
£244,000
Modelled from EPC, postcode comparables.
£199,995
Recorded with HM Land Registry.
Sales timeline
26 November 2020Most recent
£199,995
Median price across the last 5 sales in CF3 6YR: £330,000 (2025–2025).
Nearby sales in CF3 6YR
1 Clos Thomas, Old St Mellons, Cardiff, CF3 6YR
Sold Aug 2025
£340,00014 Clos Thomas, Old St Mellons, Cardiff, CF3 6YR
Sold Apr 2025
£330,00031 Clos Thomas, Old St Mellons, Cardiff, CF3 6YR
Sold Feb 2025
£348,00022 Clos Thomas, Old St Mellons, Cardiff, CF3 6YR
Sold Jan 2025
£243,00051 Clos Thomas, Old St Mellons, Cardiff, CF3 6YR
Sold Jan 2025
£285,000
Versus other Clos Thomas homes
Years Held for 6 Clos Thomas runs comfortably ahead of the street norm.
Price per m²
£3,390
Street avg £3,274
Floor Area
59 m²
Street avg 88 m²
CO₂ Emissions
1.0 t/year
Street avg 1.4 t/year
Years Held
6 years
Street avg 5 years
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 Clos Grehan, Old St Mellons
CF3 6BF
1 Heol Booths, Old St Mellons
CF3 6WA
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
Rogers Avenue — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







