14 Heol Williams, Old St Mellons, Cardiff, CF3 6AQ
About 14 Heol Williams
14 Heol Williams is a three-bedroom semi-detached house in Old St. Mellons, Cardiff, Cardiff (CF3 6AQ). It has a recorded floor area of 99 m² (around 1066 sq ft). The latest certificate (February 2020) returns a B (score 83), comfortably above the UK average. The recommended improvements would push it to A (score 94).
At 99 m² the property is well over the postcode median (71 m² across 57 EPCs), placing it in the larger end of the local stock. Across 2020–2023, sale prices on this property compounded at 4.2% per year. Last sale on file: £275,000 in May 2023.
What this property has
Inside
- Bedrooms3
- Bathrooms2
Energy performance
14 Heol Williams's carbon output is low for the local stock.
EPC Rating
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Planning history
14 Heol Williams 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
£285,000
Modelled from EPC, postcode comparables and a sale-price growth of 4.2% per year over 3 years.
£275,000
Growth on file: 4.2% per year over 3 years.
Sales timeline
31 May 2023Most recent
£275,000
+12.2%over 2 years6 August 2020
£245,000
Median price across the last 5 sales in CF3 6AQ: £237,500 (2025–2025).
Nearby sales in CF3 6AQ
13 Heol Williams, Old St Mellons, Cardiff, CF3 6AQ
Sold Jun 2025
£217,0008 Heol Williams, Old St Mellons, Cardiff, CF3 6AQ
Sold Mar 2025
£280,00031 Heol Williams, Old St Mellons, Cardiff, CF3 6AQ
Sold Mar 2025
£237,50037 Heol Williams, Old St Mellons, Cardiff, CF3 6AQ
Sold Feb 2025
£210,00040 Heol Williams, Old St Mellons, Cardiff, CF3 6AQ
Sold Jan 2025
£285,000
Versus other Heol Williams homes
Floor Area for 14 Heol Williams runs comfortably ahead of the street norm.
Price per m²
£2,778
Street avg £3,141
Floor Area
99 m²
Street avg 80 m²
CO₂ Emissions
1.5 t/year
Street avg 1.3 t/year
Years Held
3 years
Street avg 5 years
Similar properties nearby
1 Potter Street, Old St Mellons
CF3 6AR
1 Bridge Terrace, Michaelston Y Fedw
CF3 6YZ
1 Heol Swatridge, Old St Mellons
CF3 6AP
1 Church Road, Old St Mellons
CF3 6YA
1 Clos Thomas, Old St Mellons
CF3 6YR
1 Rhodfa Hughes, Old St Mellons
CF3 6YY
1 Rogers Avenue, Old St Mellons
CF3 6AL
1 Stryd Boyd, Old St Mellons
CF3 6YS
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
Rogers Avenue — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







