New dataset: Energy Efficiency of Housing

A new dataset, Energy Efficieny of Housing, provides figures for the number of Energy Performance Certificates (EPCs) in each energy efficiency rating band for a 10-year period up to the financial year ending 2023. The dataset covers lower layer super output areas (LSOAs), middle layer super output areas (MSOAs), local authorities, regions and countries in England and Wales.

The dataset is available under a new Housing theme in the query data tool:


An Energy Performance Certificate (EPC) provides information on the energy efficiency of a building. Since 2007, an EPC is required when a building is constructed, sold or let and it is valid for 10 years. Our analysis includes the latest EPC lodgements for a 10-year period, from Q2 2013 to Q1 2023.

EPCs are based on data about a building's energy features (like the building materials used, heating systems and insulation, for example), which are collected by an accredited energy assessor and are entered into government-approved software to generate the EPC. These statistics were created using domestic, record-level EPC data published on Open Data Communities by the Department for Levelling Up, Housing and Communities (DLUHC).

This data does not reflect all dwellings in England and Wales, because not every dwelling has an EPC. These are only required when a dwelling is constructed, sold or let. We also use a subset of available EPC lodgements, as we only keep records with plausible values on key energy efficiency variables. There can be multiple EPC lodgements for the same dwelling, but we analyse the latest lodgement only so we do not double count dwellings. A lodgement is essentially a record in the EPC register.

The Individual EPC bands are calculated based on the energy efficiency scores at the time the EPC lodgement was assessed. This means that our statistics do not necessarily reflect energy efficiency improvements as the majority of alterations don't require a new EPC to be generated.

For more information about this dataset please contact: Subnational Statistics and Analysis Division email: