4 Brynmawr Close, St Mellons, Cardiff, CF3 0HJ
About 4 Brynmawr Close
4 Brynmawr Close is a two-bedroom semi-detached house in St. Mellons, Cardiff, Cardiff (CF3 0HJ). It has a recorded floor area of 63 m² (around 678 sq ft), construction records dating it to 2003-2006 and council tax band B. The latest certificate (March 2013) shows a C (score 75), near the top of the C band. The recommended improvements would push it to B (score 90). The latest certificate is from March 2013, so improvements made since then won't be reflected.
Most recent transfer: February 2021 at £138,000. Across the public record there are 5 sales, relatively high churn for a single property. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend. Across 2003–2021, sale prices on this property compounded at 4.7% per year. Today's modelled estimate of £160,000 is 15.9% above the 2021 sale price. On a £-per-square-foot basis, the last sale (£204/sq ft) was about 46.6% above the typical sold price in the postcode. At 63 m² it's 26.7% smaller than the typical home in the postcode (86 m² median across 20 EPCs).
What this property has
Inside
- Bedrooms2
Energy performance
4 Brynmawr Close's EPC is over a decade old — improvements since won't be reflected.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 15 Mar 2023
EPC Rating
Certificate validity
Expired on 15 March 2023
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Planning history
4 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
Sale price has at least doubled since 2003.
£160,000
Modelled from EPC, postcode comparables and a sale-price growth of 4.7% per year over 18 years.
£138,000
Growth on file: 4.7% per year over 18 years.
Sales timeline
22 February 2021Most recent
£138,000
+10.4%over 4 years24 March 2016
£125,000
+32.3%over 2 years31 January 2014
£94,500
-5.5%over 8 years20 January 2006
£100,000
+63.9%over 2 years29 April 2003
£61,000
Median price across the last 5 sales in CF3 0HJ: £195,000 (2025–2019).
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
£202,00021 Brynmawr Close, St Mellons, Cardiff, CF3 0HJ
Sold Jul 2019
£130,0002 Brynmawr Close, St Mellons, Cardiff, CF3 0HJ
Sold May 2009
£77,000
Versus other Brynmawr Close homes
CO₂ Emissions for 4 Brynmawr Close runs comfortably ahead of the street norm.
Price per m²
£2,190
Street avg £1,926
Floor Area
63 m²
Street avg 83 m²
Habitable Rooms
3 rooms
Street avg 5 rooms
CO₂ Emissions
1.8 t/year
Street avg 2.6 t/year
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The neighbourhood at a glance
Crime
242/mo
Falling 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.







