9 Brynmawr Close, St Mellons, Cardiff, CF3 0HJ
About 9 Brynmawr Close
9 Brynmawr Close is a mid-terrace house in St. Mellons, Cardiff, Cardiff (CF3 0HJ). It has a recorded floor area of 80 m² (around 861 sq ft), construction records dating it to 1983-1990 and council tax band C. The latest certificate (June 2017) shows a C (score 75), near the top of the C band. The rating has held steady at C across 3 certificates since May 2013. Between certificates, wall efficiency went from Average to Good and lighting went from Very Poor to Very Good; while roof efficiency dropped from Very Good to Good. The recommended improvements would push it to B (score 88).
Energy performance
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating controls changed
Window efficiency improved
Wall insulation upgraded
MVHR (mechanical ventilation with heat recovery) installed
Heating controls upgraded for better temperature management
More low energy lighting installed
Ventilation system changed
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Planning history
9 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
9 Brynmawr Close has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£214,000
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 epc rating, 9 Brynmawr Close stands well clear of the street.
EPC Rating
75 (C)
Street avg 71 (C)
Floor Area
80 m²
Street avg 81 m²
CO₂ Emissions
2.2 t/year
Street avg 2.6 t/year
Habitable Rooms
5 rooms
Street avg 5 rooms
Similar properties nearby
1 Broadwell Close, St Mellons
CF3 0HU
1 Abernethy Close, St Mellons
CF3 0SB
1 Cathcob Close, St Mellons
CF3 0AH
1 Ashfield Court, St Mellons
CF3 0AE
1 Caradoc Close, St Mellons
CF3 0LQ
1 Bulrush Close, St Mellons
CF3 0AZ
1 Ashdown Close, St Mellons
CF3 0ER
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.







