Carmarthenshire: 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.
Carmarthenshire 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 Carmarthenshire
Homes sold July 2023 to June 2026, matched to the floor area and energy rating on their Energy Performance Certificate.
Median price per m²
£2,065
6,236 sales
17% below Wales
Homes sold rated EPC A to C
35.1%
Median energy score 64
7.8 points below Wales
Value added by extending, per m²
£1,063
18.0% on the sale price
10% below Wales
Energy upgrade, no extension
+13.8%
Sale-price uplift when the energy score rose 5+ points
6.3 points above Wales
The median home sold in Carmarthenshire was £190,000 for 94 m² of floor space. Price per m² is up 59% since 2015 (£1,338 to £2,128 per m², 2025). Across all 61,323 homes with a certificate, 36.8% are rated A to C on their latest one.
281 houses here were extended between two sales (second sale 2016 to 2026), adding a median 26 m². They sold for a median 18.0% more than similar unextended houses, £1,063 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