To ask the Secretary of State for Communities and Local Government when she expects the national calculation methodology for delivering the energy performance of buildings to be made available; and when it will be included within the building regulations. (150928)

The Notice of Approval of methodologies for calculating the energy performance of buildings (approved for the purposes of regulation 17A of the Building Regulations) was published on 11 May 2007. Methodologies are available or are in the process of being developed for different types of building and application. A complete set of calculation methodologies is expected to be available in the autumn.