Caerphilly: 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.
Caerphilly 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 Caerphilly
Homes sold July 2023 to June 2026, matched to the floor area and energy rating on their Energy Performance Certificate.
Median price per m²
£2,291
6,057 sales
8% below Wales
Homes sold rated EPC A to C
44.9%
Median energy score 67
2.0 points above Wales
Value added by extending, per m²
£771
9.6% on the sale price
35% below Wales
Energy upgrade, no extension
+6.6%
Sale-price uplift when the energy score rose 5+ points
0.9 points below Wales
The median home sold in Caerphilly was £190,000 for 84 m² of floor space. Price per m² is up 67% since 2015 (£1,368 to £2,284 per m², 2025). Across all 54,927 homes with a certificate, 48.4% are rated A to C on their latest one.
170 houses here were extended between two sales (second sale 2016 to 2026), adding a median 22 m². They sold for a median 9.6% more than similar unextended houses, £771 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