# The Building Regulations 2010, Regulation 25D: Energy efficiency rating


Energy efficiency ratings must be approved by the Welsh Ministers, applying the methodology of calculation and expression of the energy performance of buildings approved pursuant to regulation 24 for new buildings.

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Source: https://www.legislation.gov.uk/uksi/2010/2214/regulation/25D (the official version)
Page: https://openlegislation.uk/building-regulations-2010/regulation-25D
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.