UK EPC statistics, regional evidence and Data Book research
The EPC Atlas Research Hub turns the 2026 Data Book into permanent, crawlable studies for researchers, journalists, home-improvement businesses and anyone examining Energy Performance Certificate patterns.
Featured research
The EPC Improvement Gap
Why 4,318,888 lower-rated records also show potential A/B.
East Lancashire & Greater Manchester
Wall-efficiency and heating-efficiency clusters identified for deeper research.
Lower ratings, solar and off-gas geography
Wales leads both the D-or-below and recorded Solar-PV regional shares.
The hidden fabric and loft divide
London's overall rating profile looks different from its wall, window and applicable loft evidence.
Regional evidence base
D-or-below 47.41%
D-or-below 49.22%
D-or-below 53.86%
D-or-below 49.41%
D-or-below 51.67%
D-or-below 46.80%
D-or-below 44.01%
D-or-below 46.11%
D-or-below 49.74%
D-or-below 54.09%
Research standards
Every public statistic is tied back to the Data Book or its approved fact bank. EPC Atlas separates direct counts from exploratory associations, preserves applicable and known-status denominators, and avoids describing EPC evidence as a building survey or verified current installation register.
Earlier two-region studies
These pages remain available as historical London/North-West comparisons from the earlier research phase. The ten-region Data Book supersedes them for national totals.