21 Cathcob Close, St Mellons, Cardiff, CF3 0AH
About 21 Cathcob Close
21 Cathcob Close is a mid-terrace house in St. Mellons, Cardiff, Cardiff (CF3 0AH). It has a recorded floor area of 48 m² (around 517 sq ft), construction records dating it to 1976-1982 and council tax band A. At 48 m² this is the smallest unit on EPC record across the building (48–95 m²). The building's EPC ratings span E to A across 42 units on file. The latest certificate (February 2025) shows a C (score 79), near the top of the C band. The rating has held steady at C across 2 certificates since September 2012. Between certificates, wall efficiency went from Average to Good.
At 48 m² it sits well below the postcode median (85 m² across 41 EPCs), making it one of the more compact homes locally.
Energy performance
21 Cathcob Close's carbon output is low for the local stock.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Wall insulation upgraded
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Planning history
21 Cathcob 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
21 Cathcob Close has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£115,000
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 5 sales in CF3 0AH: £160,000 (2022–2019).
Nearby sales in CF3 0AH
1 Cathcob Close, St Mellons, Cardiff, CF3 0AH
Sold Dec 2022
£170,00013 Cathcob Close, St Mellons, Cardiff, CF3 0AH
Sold Mar 2022
£185,0009 Cathcob Close, St Mellons, Cardiff, CF3 0AH
Sold Jul 2021
£160,0002 Cathcob Close, St Mellons, Cardiff, CF3 0AH
Sold Aug 2020
£145,00027 Cathcob Close, St Mellons, Cardiff, CF3 0AH
Sold Oct 2019
£69,000
Versus other Cathcob Close homes
Floor Area for 21 Cathcob Close lags the street by a wide margin.
EPC Rating
79 (C)
Street avg 77 (C)
Floor Area
48 m²
Street avg 68 m²
CO₂ Emissions
1.1 t/year
Street avg 1.7 t/year
Habitable Rooms
2 rooms
Street avg 3 rooms
Similar properties nearby
1 Broadlands Court, St Mellons
CF3 0BZ
1 Brookfield Drive, St Mellons
CF3 0BA
1 Caspian Close, St Mellons
CF3 0BQ
1 Aspen Close, St Mellons
CF3 0BT
1 Caerleon Close, St Mellons
CF3 0HH
1 Caraway Close, St Mellons
CF3 0NF
1 Blaina Close, St Mellons
CF3 0EB
1 Bulrush Close, St Mellons
CF3 0AZ
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
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.







