21 Heddfan South, Cardiff, CF23 7EA
About 21 Heddfan South
21 Heddfan South is a mid-terrace house in Cardiff (CF23 7EA). It has a recorded floor area of 101 m² (around 1087 sq ft), construction records dating it to 1967-1975 and council tax band B. The latest certificate (August 2025) shows a C (score 74). The rating has held steady at C across 3 certificates since November 2012. Between certificates, window efficiency dropped from Average to Poor and lighting dropped from Very Good to Poor. The recommended improvements would push it to B (score 84).
Energy performance
EPC Rating
Certificate validity
Valid until 4 August 2035
Property Improvements
Changes detected from historical EPC data
Window efficiency improved
Wall insulation improved
Roof insulation improved
Low energy lighting percentage decreased
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Planning history
21 Heddfan South has no planning applications on record.
A planning report still maps activity across the surrounding area and reads this property's extension & conversion potential.
Sales history & valuation
21 Heddfan South has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£191,000
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 CF23 7EA: £103,000 (2025–2014).
Nearby sales in CF23 7EA
Versus other Heddfan South homes
Floor Area for 21 Heddfan South runs comfortably ahead of the street norm.
EPC Rating
74 (C)
Street avg 74 (C)
Floor Area
101 m²
Street avg 91 m²
CO₂ Emissions
2.5 t/year
Street avg 2.5 t/year
Habitable Rooms
4 rooms
Street avg 5 rooms
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The neighbourhood at a glance
Crime
169/mo
Falling year-on-year across the wider district.
Nearest stop
0.1 km
Heddfaen South — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







