Cardiff: house prices and energy ratings
What homes sell for per m², how energy efficient they are, and what extending has added to sale prices, compared with the rest of Wales.
Cardiff is highlighted on the map. Our planning decision figures cover England only: the Welsh Government publishes planning statistics for Welsh councils. Compare areas on the map
Property prices and energy performance in Cardiff
Homes sold July 2023 to June 2026, matched to the floor area and energy rating on their Energy Performance Certificate.
Median price per m²
£3,235
12,502 sales
30% above Wales
Homes sold rated EPC A to C
54.1%
Median energy score 69
11.2 points above Wales
Value added by extending, per m²
£1,554
13.3% on the sale price
32% above Wales
Energy upgrade, no extension
+4.0%
Sale-price uplift when the energy score rose 5+ points
3.5 points below Wales
The median home sold in Cardiff was £270,000 for 88 m² of floor space. Price per m² is up 49% since 2015 (£2,200 to £3,271 per m², 2025). Across all 126,590 homes with a certificate, 55.3% are rated A to C on their latest one.
615 houses here were extended between two sales (second sale 2016 to 2026), adding a median 27 m². They sold for a median 13.3% more than similar unextended houses, £1,554 for each m² added. Will an extension pay for itself here?
Medians from HM Land Registry sale prices and MHCLG Energy Performance Certificates; groups under 30 sales or 50 extended houses are not shown. These describe past sales across many homes, not a valuation of any one. How these are worked out