10 Clos Thomas, Old St Mellons, Cardiff, CF3 6YR
About 10 Clos Thomas
10 Clos Thomas is a semi-detached house in Old St. Mellons, Cardiff, Cardiff (CF3 6YR). It has a recorded floor area of 94 m² (around 1012 sq ft). The latest certificate (November 2020) returns a B (score 84), comfortably above the UK average. The recommended improvements would push it to A (score 94).
At 94 m² it's 20.5% larger than the typical home in the postcode (78 m² median across 44 EPCs). Today's modelled estimate of £300,000 is 33.3% above the 2020 sale price. On a £-per-square-foot basis, the last sale (£222/sq ft) was about 25.7% below the postcode norm. Most recent transfer: December 2020 at £224,995.
Energy performance
10 Clos Thomas's carbon output is low for the local stock.
EPC Rating
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Planning history
10 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.
£300,000
Modelled from EPC, postcode comparables.
£224,995
Recorded with HM Land Registry.
Sales timeline
3 December 2020Most recent
£224,995
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
10 Clos Thomas is notably below the street on price per m².
Price per m²
£2,394
Street avg £3,297
Floor Area
94 m²
Street avg 87 m²
CO₂ Emissions
1.4 t/year
Street avg 1.4 t/year
Years Held
6 years
Street avg 5 years
Similar properties nearby
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
1 Heol Swatridge, Old St Mellons
CF3 6AP
1 Potter Street, Old St Mellons
CF3 6AR
1 Bridge Terrace, Michaelston Y Fedw
CF3 6YZ
1 Rhodfa Price, Old St Mellons
CF3 6BD
1 Church Road, Old St Mellons
CF3 6YA
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.







