21 Brynmawr Close, St Mellons, Cardiff, CF3 0HJ
About 21 Brynmawr Close
21 Brynmawr Close is a four-bedroom mid-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 1983-1990 and council tax band C. The latest certificate (September 2018) shows a C (score 70). The recommended improvements would push it to B (score 87). The home occupies a cul-de-sac position.
Across 2007–2019, sale prices on this property compounded at 1% per year. Today's modelled estimate of £211,000 sits 62.3% above the 2019 sale of £130,000. On a £-per-square-foot basis, the last sale (£139/sq ft) was about 16.3% below the postcode norm. Most recent transfer: July 2019 at £130,000.
What this property has
Inside
- Bedrooms4
Outside
- Cul-de-sacYes
Building
- RefurbishedYes
Energy performance
EPC Rating
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Planning history
21 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
21 Brynmawr Close's sale-price growth has lagged the wider UK trajectory across its history on file.
£211,000
Modelled from EPC, postcode comparables and a sale-price growth of 1.0% per year over 12 years.
£130,000
Growth on file: 1.0% per year over 12 years.
Sales timeline
4 July 2019Most recent
£130,000
+13.0%over 11 years12 July 2007
£115,000
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
£138,0002 Brynmawr Close, St Mellons, Cardiff, CF3 0HJ
Sold May 2009
£77,000
Versus other Brynmawr Close homes
21 Brynmawr Close is notably below the street on price per m².
Price per m²
£1,494
Street avg £2,065
Floor Area
87 m²
Street avg 81 m²
Habitable Rooms
5 rooms
Street avg 5 rooms
CO₂ Emissions
2.8 t/year
Street avg 2.6 t/year
Similar properties nearby
1 Cathcob Close, St Mellons
CF3 0AH
1 Aston Place, St Mellons
CF3 0PH
1 Chervil Close, St Mellons
CF3 0NL
1 Brython Drive, St Mellons
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1 Cleddau Close, St Mellons
CF3 0SG
1 Caraway Close, St Mellons
CF3 0NF
1 Caradoc Close, St Mellons
CF3 0LQ
1 Ashdown Close, St Mellons
CF3 0ER
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.







