Conservation of fuel and power: Approved Document L, Volume 1 — Dwellings

O N L I N E V E R S I O N R24-27C Regulation continued Target primary energy rate calculations for new buildings 27C. (1) T his regulation applies where a building is erected. (2) N ot later than the day before the work starts, the person carrying out the work must give the local authority a notice which specifies— (a) t he target primary energy rate for the building calculated and expressed in accordance with the methodology approved pursuant to regulation 24; (b) t he calculated target primary energy rate for the building as designed, calculated and expressed in accordance with the methodology approved pursuant to regulation 24; and (c) t he list of specifications to which the building is to be constructed. (3) N ot later than five days after the work has been completed, the person carrying out the work must give the local authority— (a) a notice which specifies— (i) the target primary energy rate for the building calculated and expressed in accordance with the methodology approved pursuant to regulation 24; (ii) t he calculated target primary energy rate for the building as constructed, calculated and expressed in accordance with the methodology approved pursuant to regulation 24; and (iii) whether the building has been constructed in accordance with the list of specifications referred to in paragraph (2)(c), and if not a list of any changes to those specifications; or (b) a certificate of the sort referred to in paragraph (4) accompanied by the information referred to in sub- paragraph (a). (4) A local authority is authorised to accept, as evidence that the requirements of regulation 26C have been satisfied, a certificate to that effect by an energy assessor who is accredited to produce energy performance certificates for that category of building. (5) I n this regulation, “specifications” means specifications used for the calculation of the target primary energy rate. NOTE: Where the building control body is an approved inspector, see regulation 20 of the Building (Approved Inspectors etc.) Regulations 2010 (as amended). Intention The Secretary of State considers that a dwelling has a very high performance rate for the purposes of the definition of a nearly zero-energy building if both of the following are met. a. The dwelling meets the target emission rate required under regulation 26. b. Both: i. An analysis is made of the technical, environmental and economic feasibility of using high- efficiency alternative systems, which include decentralised energy supply systems based on energy from renewable sources. ii. This analysis is considered as required by regulation 25A. Regulation 24 Regulation 24 requires the Secretary of State to approve a methodology of calculation of the energy performance of a building. For a new dwelling, the approved methodology is the Standard Assessment Procedure. Calculation methodologies are set out in Section 1 and Section 2 of this approved document. 8 Approved Document L Volume 1, 2021 edition Building Regulations 2010 O N L I N E V E R S I O N