Isle of Anglesey: 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.
Isle of Anglesey 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 Isle of Anglesey
Homes sold July 2023 to June 2026, matched to the floor area and energy rating on their Energy Performance Certificate.
Median price per m²
£2,474
2,114 sales
In line with Wales
Homes sold rated EPC A to C
22.7%
Median energy score 59
20.2 points below Wales
Value added by extending, per m²
£1,443
18.9% on the sale price
22% above Wales
Energy upgrade, no extension
+8.7%
Sale-price uplift when the energy score rose 5+ points
1.2 points above Wales
The median home sold in Isle of Anglesey was £225,000 for 90 m² of floor space. Price per m² is up 49% since 2015 (£1,655 to £2,471 per m², 2025). Across all 25,101 homes with a certificate, 34.4% are rated A to C on their latest one.
75 houses here were extended between two sales (second sale 2016 to 2026), adding a median 26 m². They sold for a median 18.9% more than similar unextended houses, £1,443 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