Vale of Glamorgan: 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.
Vale of Glamorgan 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 Vale of Glamorgan
Homes sold July 2023 to June 2026, matched to the floor area and energy rating on their Energy Performance Certificate.
Median price per m²
£3,198
5,241 sales
29% above Wales
Homes sold rated EPC A to C
52.3%
Median energy score 69
9.4 points above Wales
Value added by extending, per m²
£1,768
16.4% on the sale price
50% above Wales
Energy upgrade, no extension
+7.5%
Sale-price uplift when the energy score rose 5+ points
In line with Wales
The median home sold in Vale of Glamorgan was £280,000 for 91 m² of floor space. Price per m² is up 51% since 2015 (£2,148 to £3,235 per m², 2025). Across all 44,884 homes with a certificate, 51.8% are rated A to C on their latest one.
250 houses here were extended between two sales (second sale 2016 to 2026), adding a median 30 m². They sold for a median 16.4% more than similar unextended houses, £1,768 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