Non-domestic conventions released by DCLG (Issue 5 v1.0)

The latest set of conventions for non-domestic energy assessments have been released by DCLG. These conventions, Issue 5 v1.0, apply to assessments in England and Wales only and must be applied by all NDEPC accredited Energy Assessors. This also applies to those Energy Assessors currently in training. The implementation date for the new conventions (highlighted in blue) is 1st September 2014. These conventions will be included as part of future quality assurance checks of the assessments that have been undertaken and the EPCs produced after the date in the right hand column.

Quidos have compiled the following explanations and guides which we hope you will find useful. It is imperative that you read and understand not only the new conventions, but the existing ones as well. If you have any questions on this latest release or the explanations we have provided, please email with your query.

You can also find the conventions here


For any technical queries, please contact Jonathan Ellis on 01225 326 895 or email

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