23 Brynmawr Close, St Mellons, Cardiff, CF3 0HJ
About 23 Brynmawr Close
23 Brynmawr Close is an end-of-terrace house in St. Mellons, Cardiff, Cardiff (CF3 0HJ). It has a recorded floor area of 87 m² (around 936 sq ft), construction records dating it to 1967-1975 and council tax band C. The latest certificate (May 2023) shows a C (score 72). The rating has held steady at C across 2 certificates since January 2011. Between certificates, lighting went from Very Poor to Very Good; while wall efficiency dropped from Good to Average and hot-water efficiency dropped from Very Good to Good. The recommended improvements would push it to B (score 84).
Energy performance
EPC Rating
Property Improvements
Changes detected from historical EPC data
Hot water efficiency decreased
More low energy lighting installed
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Planning history
23 Brynmawr 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
23 Brynmawr Close has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£215,000
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 0HJ: £195,000 (2025–2021).
Nearby sales in CF3 0HJ
18 Brynmawr Close, St Mellons, Cardiff, CF3 0HJ
Sold Oct 2025
£195,0003 Brynmawr Close, St Mellons, Cardiff, CF3 0HJ
Sold Jan 2023
£215,0001 Brynmawr Close, St Mellons, Cardiff, CF3 0HJ
Sold Jun 2022
£202,0004 Brynmawr Close, St Mellons, Cardiff, CF3 0HJ
Sold Feb 2021
£138,00021 Brynmawr Close, St Mellons, Cardiff, CF3 0HJ
Sold Jul 2019
£130,000
Versus other Brynmawr Close homes
On floor area, 23 Brynmawr Close stands well clear of the street.
EPC Rating
72 (C)
Street avg 71 (C)
Floor Area
87 m²
Street avg 81 m²
CO₂ Emissions
2.8 t/year
Street avg 2.6 t/year
Habitable Rooms
4 rooms
Street avg 5 rooms
Similar properties nearby
1 Abernethy Close, St Mellons
CF3 0SB
1 Broadwell Close, St Mellons
CF3 0HU
1 Cathcob Close, St Mellons
CF3 0AH
1 Ashfield Court, St Mellons
CF3 0AE
1 Caradoc Close, St Mellons
CF3 0LQ
1 Ashdown Close, St Mellons
CF3 0ER
1 Bulrush Close, St Mellons
CF3 0AZ
1 Blaina Close, St Mellons
CF3 0EB
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
Willowdene Way — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







