The Home Index

Analysis

Long-form studies built on the full EPC register and HM Land Registry sales. Every figure carries its source line and method. Open Government Licence.

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Analysis17 June 2026
The Retrofit Gap Index: methodology and the 2030 exposure of England & Wales
How the Retrofit Gap Index is built — 18.1 million EPC certificates fused with HM Land Registry sales — and what it shows about the cost and value of bringing England & Wales to EPC band C by 2030.
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Analysis from the Home Index, modelled from EPC Open Data and HM Land Registry Price Paid (Open Government Licence).

The Retrofit Gap Index: methodology and the 2030 exposure of England & Wales