The Building Regulations 2010

[F1Fabric energy efficiency rate calculationsE

This section has no associated Explanatory Memorandum

27A.—(1) This regulation applies where a dwelling is erected and regulation 26A applies.

[F2(2) The person carrying out the work must—

(a)where the dwelling is within a higher-risk building, ensure the application for building control approval in relation to the work is accompanied by a notice which specifies—

(i)the target fabric energy efficiency rate for the dwelling, calculated and expressed in accordance with the methodology approved pursuant to regulation 24,

(ii)the fabric energy efficiency rate for the dwelling as designed, calculated and expressed in accordance with the methodology approved pursuant to regulation 24, and

(iii)a list of specifications to which the dwelling is to be constructed;

(b)in any other case, not later than the day before the work starts, give the building control authority a notice which specifies the matters set out in paragraphs (i) to (iii) of sub-paragraph (a).

(3) The person carrying out the work must—

(a)where the dwelling is within a higher-risk building, ensure the application for a completion certificate in relation to the work is accompanied by—

(i)a notice which specifies—

(aa)the target fabric energy efficiency rate for the dwelling, calculated and expressed in accordance with the methodology approved pursuant to regulation 24,

(bb)the fabric energy efficiency rate for the dwelling as constructed, calculated and expressed in accordance with the methodology approved pursuant to regulation 24, and

(cc)whether the dwelling has been constructed in accordance with the list of specifications referred to in paragraph (2), and, if not, a list of any changes to those specifications; or

(ii)a certificate of the sort referred to in paragraph (4) accompanied by the information referred to in sub-paragraphs (aa) to (cc) of paragraph (i);

(b)in any other case, not later than five days after the work has been completed, give the building control authority a notice which specifies the matters mentioned in sub-paragraphs (aa) to (cc) of sub-paragraph (a)(i) or a certificate of the sort mentioned in sub-paragraph (a)(ii).]

(4) A [F3building control authority] is authorised to accept, as evidence that the requirements of regulation 26A have been satisfied, a certificate to that effect by an energy assessor who is accredited to produce [F4energy performance certificates] for that category of building.

[F5(4A) Where the regulator is the building control authority by virtue of section 91ZB of the Act (the regulator: building control authority for other work), it must send a copy of each notice or certificate it receives under this regulation in relation to a building to the local authority for the area in which the building is situated.]

(5) In this Regulation, “specifications” means specifications used for the calculation of the fabric energy efficiency rate.]

Extent Information

E1This version of this provision applies to England only; a separate version has been created for Wales only

Textual Amendments

F1Reg. 27A inserted (E., but only in relation to excepted energy buildings in W.) (6.4.2014) by The Building Regulations &c. (Amendment) (No.2) Regulations 2013 (S.I. 2013/1959), regs. 1(5), 6 (with reg. 1(3)) [Editorial note: This amendment no longer applies at all in relation to W. from 8.6.2018]

F4Words in reg. 27A(4) substituted (E., but only in relation to excepted energy buildings in W.) (6.4.2016) by The Building Regulations &c. (Amendment) Regulations 2016 (S.I. 2016/285), regs. 1(4), 2(12)(e) (with reg. 1(3)) [Editorial note: This amendment no longer applies at all in relation to W. from 8.6.2018]

Modifications etc. (not altering text)

C1Reg. 27A applied (with modifications) (6.4.2014) by S.I. 2010/2215, reg. 20(1)(2A) (as amended by The Building Regulations &c. (Amendment) Regulations 2014 (S.I. 2014/579), regs. 1(4), 3(3) (with reg. 1(3)))

[F6Primary energy ... rate calculationsW

27A.—(1) This regulation applies where a building F7... is erected and regulation 26A applies.

(2) Not later than the day before the work starts, the person carrying out the work must give the local authority a notice which specifies—

(a)the target primary energy F8... rate for the building [F9, calculated and expressed in accordance with the methodology approved pursuant to regulation 24];

(b)the F10... primary energy F11... rate for the building as designed [F12, calculated and expressed in accordance with the methodology approved pursuant to regulation 24]; and

(c)a list of specifications to which the building is to be constructed.

(3) Not 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 F13... rate for the building [F14, calculated and expressed in accordance with the methodology approved pursuant to regulation 24];

(ii)the F15... primary energy F16... rate for the building as constructed [F17, 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 26A have been satisfied, a certificate to that effect by an energy assessor who is accredited to produce [F18energy performance certificates] for that category of building.

(5) In this regulation, “specifications” means specifications used for the calculation of the primary energy F19... rate.]

Extent Information

E2This version of this provision applies to Wales only; a separate version has been created for England only

Textual Amendments

F6Regs. 27A, 27B inserted (W. but not in relation to excepted energy buildings) (31.7.2014) by The Building (Amendment) (Wales) Regulations 2014 (S.I. 2014/110), regs. 1(3), 7 (with reg. 1(2))

F9Words in reg. 27A(2)(a) inserted (W. but not in relation to excepted energy buildings) (17.6.2016) by The Building Regulations &c. (Amendment) (Wales) Regulations 2016 (S.I. 2016/611), regs. 1(4), 2(14)(a) (with reg. 1(3))

F10Word in reg. 27A(2)(b) omitted (W. but not in relation to excepted energy buildings) (17.6.2016) by virtue of The Building Regulations &c. (Amendment) (Wales) Regulations 2016 (S.I. 2016/611), regs. 1(4), 2(14)(b) (with reg. 1(3))

F12Words in reg. 27A(2)(b) inserted (W. but not in relation to excepted energy buildings) (17.6.2016) by The Building Regulations &c. (Amendment) (Wales) Regulations 2016 (S.I. 2016/611), regs. 1(4), 2(14)(b) (with reg. 1(3))

F14Words in reg. 27A(3)(a)(i) inserted (W. but not in relation to excepted energy buildings) (17.6.2016) by The Building Regulations &c. (Amendment) (Wales) Regulations 2016 (S.I. 2016/611), regs. 1(4), 2(14)(c) (with reg. 1(3))

F15Word in reg. 27A(3)(a)(ii) omitted (W. but not in relation to excepted energy buildings) (17.6.2016) by virtue of The Building Regulations &c. (Amendment) (Wales) Regulations 2016 (S.I. 2016/611), regs. 1(4), 2(14)(d) (with reg. 1(3))

F17Words in reg. 27A(3)(a)(ii) inserted (W. but not in relation to excepted energy buildings) (17.6.2016) by The Building Regulations &c. (Amendment) (Wales) Regulations 2016 (S.I. 2016/611), regs. 1(4), 2(14)(d) (with reg. 1(3))

F18Words in reg. 27A(4) substituted (W. but not in relation to excepted energy buildings) (17.6.2016) by The Building Regulations &c. (Amendment) (Wales) Regulations 2016 (S.I. 2016/611), regs. 1(4), 2(14)(e) (with reg. 1(3))

Modifications etc. (not altering text)

C3Reg. 27A applied (with modifications) (W.) (31.7.2014) by S.I. 2010/2215, reg. 20(1)(2A) (as amended by The Building (Amendment) (Wales) Regulations 2014 (S.I. 2014/110), regs. 1(3), 13 (with reg. 1(2))) (as amended: (W.) (8.6.2018) by S.I. 2018/558, regs. 1(2), 21 (with reg. 29); and (W.) (25.4.2024) by S.I. 2024/447, regs. 1(1), 3(h) (with reg. 6))