The Building Regulations 2010

[^key-137f3e17d84b3e979d3d04c8b2b8cb09]: Reg. 16(2)-(3B) substituted for reg. 16(2)(3) (E., but only in relation to excepted energy buildings in W.) (6.4.2013) by The Building Regulations &c. (Amendment) Regulations 2012 (S.I. 2012/3119), reg. 9(a), Sch. 1 (with regs. 1(3), 45-47) (as amended by S.I. 2013/181, reg. 5, Sch.)

[^key-145f7de329475ba1ebca125d5371b3ed]: Words in reg. 27B(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(15)(d) (with reg. 1(3))

[^key-147d1f8abe3c9edb8f73b1b2df371cc1]: Reg. 20(3A)-(3D) inserted (W. for remaining purposes) (19.4.2013 for specified purposes, 1.10.2013 in so far as not already in force) by The Building Regulations &c. (Amendment) (Wales) Regulations 2013 (S.I. 2013/747), regs. 1(4), 11(a) (with reg. 1(2)(3))

[^key-14ba212fddef45729865363727356dc3]: Word in reg. 11(3) inserted (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(4) (with reg. 1(3)) [Editorial note: This amendment no longer applies at all in relation to W. from 8.6.2018]

[^key-15a7527dd48a9f1d185de6df29a52e95]: Regs. 14-14C substituted for reg. 14 (E.) (1.10.2023) by The Building Regulations etc. (Amendment) (England) Regulations 2023 (S.I. 2023/911), regs. 1(2), 8 (with regs. 22-24)

[^key-15d681ad2514a9aaf626a99d677f3720]: Reg. 20(5)(6) inserted (E., but only in relation to excepted energy buildings in W.) (28.1.2013) by The Building Regulations &c. (Amendment) Regulations 2012 (S.I. 2012/3119), reg. 13(b), Sch. 1 (with regs. 1(3), 45-47)

[^key-15d9709c6ed9b0b7ce9ca55b5968bec6]: Words in Sch. 3 para. 11 omitted (W. but not in relation to excepted energy buildings) (28.2.2018) by virtue of The Building (Amendment) (Wales) Regulations 2017 (S.I. 2017/1274), regs. 1(2)(b), 2(3)(b)(ii) (with reg. 1(3))

[^key-1667594457fb81d53276d442308a13bd]: Words in reg. 2(1) substituted (E.) (1.10.2023) by The Building Regulations etc. (Amendment) (England) Regulations 2023 (S.I. 2023/911), regs. 1(2), 3(b) (with regs. 22-24)

[^key-16eb8f765d940a3886cfc207c1b80b7d]: Word in reg. 37A(1)(a) inserted (W.) (13.1.2020) by The Building (Amendment) (Wales) Regulations 2019 (S.I. 2019/1499), regs. 1(4), 2(7)(a) (with regs. 1(3), 3)

[^key-16f8d43124bf6d5bc4979ca553f5c6b5]: Word in Sch. 3 para. 18 substituted for comma (E.) (15.6.2022) by The Building Regulations etc. (Amendment) (England) Regulations 2021 (S.I. 2021/1391), regs. 1(1), 12(2)(r) (with reg. 1(2))

[^key-172b16332c1d1bd5b69f06c4c090a3fd]: Reg. 4(4)(5) inserted (E.) (15.6.2022) by The Building Regulations etc. (Amendment) (England) Regulations 2021 (S.I. 2021/1391), regs. 1(1), 4 (with regs. 1(2), 17) (as amended (5.6.2023) by S.I. 2023/520, regs. 1(2), 3)

[^key-172b4511f9b2ddd1e4ff408ce6d5bcfb]: Word in Sch. 3 para. 10 substituted for comma (W.) (23.11.2022) by The Building (Amendment) (Wales) Regulations 2022 (S.I. 2022/564), regs. 1(3), 17(2)(k) (with reg. 21)

[^key-1784cbbe96d24b168a42d074da072554]: Words in reg. 17A(1) substituted (E.) (1.10.2023) by The Building Regulations etc. (Amendment) (England) Regulations 2023 (S.I. 2023/911), regs. 1(2), 7(7)(a) (with regs. 22-24)

[^key-17c3358a87d1d69cfcd3e16427ec1957]: Reg. 43 applied (with modifications) (1.10.2010) by The Building (Approved Inspectors etc.) Regulations 2010 (S.I. 2010/2215), regs. 1, 20(1) (as amended (W.) (25.4.2024) by S.I. 2024/447, regs. 1(1), 3(h) (with reg. 6))

[^key-1817043d4063f6d16d3c33b32f01bcfb]: Words in reg. 2(1) substituted (W.) (23.11.2022) by The Building (Amendment) (Wales) Regulations 2022 (S.I. 2022/564), regs. 1(3), 3(a)(ii) (with reg. 21)

[^key-192020a4e5a186d555bb49ce957d676b]: Regs. 2A, 2B inserted (E.) (1.10.2023) by The Building Regulations etc. (Amendment) (England) Regulations 2023 (S.I. 2023/911), regs. 1(2), 4 (with regs. 22-24)

[^key-1953e9021cf1638651d39ff43053d0c2]: Word "25(a)" in reg. 34 substituted for “25” (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), 7 (with reg. 1(3)) [Editorial note: This amendment no longer applies at all in relation to W. from 8.6.2018]

[^key-1980e09a539386b5cf2c8e3b14f16416]: Word in reg. 25(a) omitted (E.) (15.6.2022) by virtue of The Building Regulations etc. (Amendment) (England) Regulations 2021 (S.I. 2021/1391), regs. 1(1), 5(a) (with regs. 1(2), 17) (as amended (5.6.2023) by S.I. 2023/520, regs. 1(2), 3)

[^key-19a4547d8edb2ecca358cc499f6dcb8d]: Words in reg. 37A(4)(c) substituted (W.) (4.11.2024) by The Historic Environment (Wales) Act 2023 (Consequential Provision) (Secondary Legislation) Regulations 2024 (S.I. 2024/924), regs. 1(2), 51(c)

[^key-19d78f9d889249e7dc6e32892226df30]: Words in reg. 44C inserted (W.) (1.7.2025) by The Building etc. (Amendment) (Wales) Regulations 2025 (S.I. 2025/377), regs. 1(3), 4(3)(c) (with reg. 3)

[^key-1a320750771901c4b85b2a55b07f2939]: Words in reg. 27B(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(15)(b) (with reg. 1(3))

[^key-1b0d87e63a4f9ba50a362fda80d9878d]: Words in reg. 12(2)(b) substituted (E.) (1.10.2023) by The Building Regulations etc. (Amendment) (England) Regulations 2023 (S.I. 2023/911), regs. 1(2), 7(2)(b)(ii) (with regs. 22-24)

[^key-1b23e897fc8ecc334f513777fe949725]: Word in reg. 6(2) omitted (E., but only in relation to excepted energy buildings in W.) (1.10.2015) by virtue of The Building Regulations &c. (Amendment) Regulations 2015 (S.I. 2015/767), regs. 1(4)(b), 2(4)(c)(i) (with regs. 1(3), 5) [Editorial note: This amendment no longer applies at all in relation to W. from 8.6.2018]

[^key-1b8630eea2f27cf9ff7b165fbaaf589d]: Words in reg. 15(2)(b) substituted (W. for remaining purposes) (19.4.2013) by The Building Regulations &c. (Amendment) (Wales) Regulations 2013 (S.I. 2013/747), regs. 1(4), 6 (with reg. 1(2)(3))

[^key-1b8b6221c30259c28d15228c5b6a5600]: Reg. 17(2A)(g) added (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(5)(c) (with reg. 1(3))

[^key-1caa31700c4552e7ac9af8c72a217eec]: Reg. 29 omitted (W. for remaining purposes) (17.6.2016) by virtue of The Building Regulations &c. (Amendment) (Wales) Regulations 2016 (S.I. 2016/611), regs. 1(4), 2(16) (with reg. 1(3))

[^key-1d34845381a9c1b960a3dc80e747fb9c]: Reg. 37(2)(3) substituted for reg. 37(2) (E.) (1.10.2023) by The Building Regulations etc. (Amendment) (England) Regulations 2023 (S.I. 2023/911), regs. 1(2), 7(15)(b) (with regs. 22-24)

[^key-1dbc5de05633f1afab509a270a431600]: Word in reg. 26A omitted (W.) (23.11.2022) by virtue of The Building (Amendment) (Wales) Regulations 2022 (S.I. 2022/564), regs. 1(3), 8(c) (with reg. 21)

[^key-1e3cd5cbbc5c714e3e06b84d1eacb33b]: Words in reg. 20A(4) substituted (1.10.2023) by The Building Regulations etc. (Amendment) (England) Regulations 2023 (S.I. 2023/911), regs. 1(2), 7(10)(a) (with regs. 22-24)

[^key-1eb4a8e25c44025f55c96d580c118ec7]: Sch. 1 Pt. Q added (E., but only in relation to excepted energy buildings in W.) (1.10.2015) by The Building Regulations &c. (Amendment) Regulations 2015 (S.I. 2015/767), regs. 1(4)(b), 2(11)(c) (with regs. 1(3), 5)

[^key-1eb93b92aa874d22ce402ced2218d0e4]: Word in reg. 13(1) omitted (E., but only in relation to excepted energy buildings in W.) (1.10.2015) by virtue of The Building Regulations &c. (Amendment) Regulations 2015 (S.I. 2015/767), regs. 1(4)(b), 2(5)(a)(i) (with regs. 1(3), 4) [Editorial note: This amendment no longer applies at all in relation to W. from 8.6.2018]

[^key-1fc331f635e794059d96d876d53e3a22]: Words in Sch. 4 para. 1(g)(i) added (E., but only in relation to excepted energy buildings in W.) (6.4.2014) by The Building Regulations &c. (Amendment) Regulations 2014 (S.I. 2014/579), regs. 1(4), 2(11)(a) (with reg. 1(3)) [Editorial note: This amendment no longer applies at all in relation to W. from 8.6.2018]

[^key-1feec4c67038a5e1cf330b414feda5bb]: Words in reg. 15(3) substituted (E.) (1.10.2023) by The Building Regulations etc. (Amendment) (England) Regulations 2023 (S.I. 2023/911), regs. 1(2), 7(4)(c)(ii) (with regs. 22-24)

[^key-203e18d9948ae727f61e44c949a94889]: Reg. 27A(4A) inserted (E.) (1.10.2023) by The Building Regulations etc. (Amendment) (England) Regulations 2023 (S.I. 2023/911), regs. 1(2), 7(13)(c) (with regs. 22-24)

[^key-20fd97295f32d6e9c27045e277bb28a0]: Words in reg. 4(2) inserted (E.) (21.12.2018) by The Building (Amendment) Regulations 2018 (S.I. 2018/1230), regs. 1(4), 2(3) (with regs. 1(3), 3)

[^key-2279166ea6490b89a22ff87c953c6424]: Reg. 12(6)(c) and word "; or" omitted (W.) (8.6.2018) by virtue of The Building Regulations &c. (Amendment) (Excepted Energy Buildings) (Wales) Regulations 2018 (S.I. 2018/558), regs. 1(2), 5(1)(a)(ii)(iii) (with reg. 29)

[^key-22bb4e114981dc3d5fb9f94ba4c8247c]: Word in Sch. 3 para. 19 substituted for comma (E.) (15.6.2022) by The Building Regulations etc. (Amendment) (England) Regulations 2021 (S.I. 2021/1391), regs. 1(1), 12(2)(s) (with reg. 1(2))

[^key-2317057fe153a59fe1ef596f51ff2964]: Reg. 20A modified (6.4.2024) by The Building (Registered Building Control Approvers etc.) (England) Regulations 2024 (S.I. 2024/110), regs. 1(3), 5(2)(3) (with regs. 44-47)

[^key-23a85c81c8d7044504c2ced81253e613]: Word in Sch. 3 para. 3 substituted for comma (W.) (23.11.2022) by The Building (Amendment) (Wales) Regulations 2022 (S.I. 2022/564), regs. 1(3), 17(2)(d) (with reg. 21)

[^key-23fe66d87fa3fcb62e97014870f06d8d]: Words in reg. 18(1) substituted (E.) (1.10.2023) by The Building Regulations etc. (Amendment) (England) Regulations 2023 (S.I. 2023/911), regs. 1(2), 7(8)(a) (with regs. 22-24)

[^key-2423ffc28ba8881db9db1327698fb7ec]: Reg. 12(9): full stop omitted (E., but only in relation to excepted energy buildings in W.) (6.4.2013) by virtue of The Building Regulations &c. (Amendment) Regulations 2012 (S.I. 2012/3119), reg. 6(b)(ii), Sch. 1 (with regs. 1(3), 45-47) (as amended by S.I. 2013/181, reg. 5, Sch.)

[^key-244b4fdf3596d37ba508d8ad8d6c212e]: Words in reg. 44C inserted (W.) (1.7.2025) by The Building etc. (Amendment) (Wales) Regulations 2025 (S.I. 2025/377), regs. 1(3), 4(3)(d) (with reg. 3)

[^key-2497a46d0fe88be63f9ef914f94ee757]: Reg. 25(c) and word inserted (E.) (15.6.2022) by The Building Regulations etc. (Amendment) (England) Regulations 2021 (S.I. 2021/1391), regs. 1(1), 5(b) (with regs. 1(2), 17) (as amended (5.6.2023) by S.I. 2023/520, regs. 1(2), 3)

[^key-260bb7eb12b293b7cac8535e2f59b38c]: Words in reg. 12(6) substituted (E.) (1.10.2023) by The Building Regulations etc. (Amendment) (England) Regulations 2023 (S.I. 2023/911), regs. 1(2), 7(2)(d) (with regs. 22-24)

[^key-261804483c07350a1cec92dee4a1f741]: Words in reg. 2(1) inserted (E., but only in relation to excepted energy buildings in W.) (1.10.2015) by The Building Regulations &c. (Amendment) Regulations 2015 (S.I. 2015/767), regs. 1(4)(b), 2(2)(b) (with reg. 1(3)) [Editorial note: This amendment no longer applies at all in relation to W. from 8.6.2018]

[^key-269488091def89e5e79f0cabcd537532]: Words in reg. 37A(1)(a) substituted (W., but not in relation to excepted energy buildings) (2.4.2018) by The Regulation and Inspection of Social Care (Wales) Act 2016 (Consequential Amendments to Secondary Legislation) Regulations 2018 (S.I. 2018/48), reg. 1(2), Sch. 1 para. 23(2)

[^key-26b64156bd89450956e24af4ad64b66e]: Words in reg. 11(3) substituted (W. but not in relation to excepted energy buildings) (8.4.2016) by The Building (Amendment) (Wales) Regulations 2016 (S.I. 2016/361), regs. 1(4), 2(3) (with regs. 1(3), 3)

[^key-26df1cdbb90ca0cc88940954a0d769c7]: Word in reg. 27A(2)(b) omitted (W.) (23.11.2022) by virtue of The Building (Amendment) (Wales) Regulations 2022 (S.I. 2022/564), regs. 1(3), 10(c) (with reg. 21)

[^key-27188de85885c1bb5b901ca49a550695]: Words in reg. 2(1) omitted (W. for remaining purposes) (17.6.2016) by virtue of The Building Regulations &c. (Amendment) (Wales) Regulations 2016 (S.I. 2016/611), regs. 1(4), 2(2)(b) (with reg. 1(3))

[^key-2731702deec405b217aedc3ed9068f8c]: Words in reg. 2(1) omitted (E.) (1.10.2023) by virtue of The Building Regulations etc. (Amendment) (England) Regulations 2023 (S.I. 2023/911), regs. 1(2), 3(c) (with regs. 22-24)

[^key-2766d8f94a11b1ba983254dda3add6df]: Pt. 9A inserted (W. but not in relation to excepted energy buildings) (8.4.2016) by The Building (Amendment) (Wales) Regulations 2016 (S.I. 2016/361), regs. 1(4), 2(4) (with regs. 1(3), 3)

[^key-280412142a611c5b5840a41bd1b42c99]: Words in reg. 2(1) inserted (E., but only in relation to excepted energy buildings in W.) (9.1.2013) by The Building Regulations &c. (Amendment) Regulations 2012 (S.I. 2012/3119), reg. 3(a), Sch. 1 (with regs. 1(3), 45-47)

[^key-284d53893db25530c32d558b804a070b]: Words in reg. 2(1) added (15.7.2011) by The Building (Amendment) Regulations 2011 (S.I. 2011/1515), regs. 1(2), 3(2)(b)

[^key-28fa85b651fc831d333cf3d72eca281d]: Word in reg. 35(1) omitted (W. for remaining purposes) (19.4.2013) by virtue of The Building Regulations &c. (Amendment) (Wales) Regulations 2013 (S.I. 2013/747), regs. 1(4), 20(b)(i) (with reg. 1(2)(3))

[^key-290c85add019cfcaa0993e4390fed677]: Word in Sch. 3 para. 12 substituted for comma (W.) (23.11.2022) by The Building (Amendment) (Wales) Regulations 2022 (S.I. 2022/564), regs. 1(3), 17(2)(m) (with reg. 21)

[^key-296065aebd5338ff2ce545f61dde5ec4]: Words in Sch. 3 para. 11 omitted (W. for remaining purposes) (W.) (15.1.2018) by virtue of The Building (Amendment) (Wales) Regulations 2017 (S.I. 2017/1274), regs. 1(2)(a), 2(3)(b)(iii) (with reg. 1(3))

[^key-29c6b12c0f34b4a120ca2898561e2d88]: Words in reg. 44(3) substituted (E.) (1.10.2023) by The Building Regulations etc. (Amendment) (England) Regulations 2023 (S.I. 2023/911), regs. 1(2), 7(19)(a) (with regs. 22-24)

[^key-2a260d51028308bd3d123867440bc90e]: Sch. 4A omitted (W. for remaining purposes) (17.6.2016) by virtue of The Building Regulations &c. (Amendment) (Wales) Regulations 2016 (S.I. 2016/611), regs. 1(4), 2(16) (with reg. 1(3))

[^key-2a3ca4ee595fbeb658113b450402f5a0]: Reg. 20(3C) inserted (W. in relation to excepted energy buildings) (8.6.2018) by The Building Regulations &c. (Amendment) (Excepted Energy Buildings) (Wales) Regulations 2018 (S.I. 2018/558), regs. 1(2), 6(2)(a) (with reg. 29)

[^key-2a54c134a8a1ca7db55aa7b56199163e]: Words in reg. 44B(a)(iii) substituted (W.) (4.11.2024) by The Historic Environment (Wales) Act 2023 (Consequential Provision) (Secondary Legislation) Regulations 2024 (S.I. 2024/924), regs. 1(2), 52(c)

[^key-2a70f709e786b03e64268c3344ca08e7]: Word in reg. 37A(1)(a) substituted (W.) (13.1.2020) by The Building (Amendment) (Wales) Regulations 2019 (S.I. 2019/1499), regs. 1(4), 2(7)(b) (with regs. 1(3), 3)

[^key-2b26d489a956af06b89c67cb839e38c2]: Word in reg. 6(1)(c) substituted (E.) (1.12.2022) by The Building etc. (Amendment) (England) Regulations 2022 (S.I. 2022/603), regs. 1(4), 2(3)(a) (with reg. 4)

[^key-2b859039bb93fd83b5aa9213dab99250]: Reg. 10(2) substituted (1.10.2023) by The Building Regulations etc. (Amendment) (England) Regulations 2023 (S.I. 2023/911), regs. 1(2), 5(1) (with regs. 5(2)(3), 22-24)

[^key-2c6a15c211a137f5fe11216d36ed6525]: Words in reg. 18A(1)(a) inserted (7.10.2025) by The Building Regulations etc. (Amendment) (England) Regulations 2025 (S.I. 2025/1017), regs. 1(2), 10(2)

[^key-2c7aea83a33c202b61634cdddf08d066]: Words in reg. 17(1) substituted (E.) (1.10.2023) by The Building Regulations etc. (Amendment) (England) Regulations 2023 (S.I. 2023/911), regs. 1(2), 13(2) (with regs. 22-24)

[^key-2de11d6621a3e7fa0579e38bf13845e0]: Reg. 5(k) and word inserted (E.) (21.12.2018) by The Building (Amendment) Regulations 2018 (S.I. 2018/1230), regs. 1(4), 2(4)(b) (with regs. 1(3), 3)

[^key-2e713f633637dc093af6e6512613ffad]: Word in Sch. 3 para. 11 substituted for comma (W.) (23.11.2022) by The Building (Amendment) (Wales) Regulations 2022 (S.I. 2022/564), regs. 1(3), 17(2)(l) (with reg. 21)

[^key-2eb4e7353001343a3634cbe7db4db0a5]: Word in Sch. 3 para. 20 substituted for comma (E.) (15.6.2022) by The Building Regulations etc. (Amendment) (England) Regulations 2021 (S.I. 2021/1391), regs. 1(1), 12(2)(t) (with reg. 1(2))

[^key-2eb8c08bed9f93bd4171857910542fe3]: Words in Sch. 4 para. 4 inserted (W. in relation to excepted energy buildings) (8.6.2018) by The Building Regulations &c. (Amendment) (Excepted Energy Buildings) (Wales) Regulations 2018 (S.I. 2018/558), regs. 1(2), 16(3) (with reg. 29)

[^key-2ed452e1b5271e3c0f57bd4a15b67b10]: Words in reg. 37(1) substituted (E.) (1.10.2023) by The Building Regulations etc. (Amendment) (England) Regulations 2023 (S.I. 2023/911), regs. 1(2), 7(15)(a) (with regs. 22-24)

[^key-301937d344f73029524e2c74e35be4f3]: Reg. 45 omitted (E.) (1.10.2023) by virtue of The Building Regulations etc. (Amendment) (England) Regulations 2023 (S.I. 2023/911), regs. 1(2), 14(2) (with regs. 22-24)

[^key-305ca4863d195b03c6ca849b2a14a481]: Reg. 27C modified (E.) (6.4.2024) by The Building (Registered Building Control Approvers etc.) (England) Regulations 2024 (S.I. 2024/110), regs. 1(3), 5(6) (with regs. 44-47)

[^key-307149fe17d4088dd91d10b42d84593a]: Words in reg. 14(3)(b) substituted (E.) (6.4.2024) by The Building (Registered Building Control Approvers etc.) (England) Regulations 2024 (S.I. 2024/110), regs. 1(3), 38(3)

[^key-30b2fc01deadea7cf023f4c149a059bb]: Word in reg. 35(1) omitted (E., but only in relation to educational buildings and buildings of statutory undertakers in W., Crown buildings in W., building work carried out or proposed to be carried out by Crown authorities in W., and excepted energy buildings in W.) (9.1.2013) by virtue of The Building Regulations &c. (Amendment) Regulations 2012 (S.I. 2012/3119), reg. 23(b)(i), Sch. 1 (with reg. 1(3)(4), 45-47)

[^key-31175b5fee08422f9c4d11ae4394645b]: Words in reg. 12(5) substituted (E.) (1.10.2023) by The Building Regulations etc. (Amendment) (England) Regulations 2023 (S.I. 2023/911), regs. 1(2), 7(2)(c) (with regs. 22-24)

[^key-316a82ea17ee06c4dab3d3c7006dab91]: Words in Sch. 3 para. 8 omitted (W. for remaining purposes) (15.1.2018) by virtue of The Building (Amendment) (Wales) Regulations 2017 (S.I. 2017/1274), regs. 1(2)(a), 2(3)(a) (with reg. 1(3))

[^key-32802d925187f78e688c207c9da1bd79]: Words in reg. 48(1)(d) inserted (E., but only in relation to excepted energy buildings in W.) (9.1.2013) by The Building Regulations &c. (Amendment) Regulations 2012 (S.I. 2012/3119), reg. 26(a), Sch. 1 (with regs. 1(3), 45-47)

[^key-32dc5b6758660422f7222b9af095e138]: Words in reg. 4(1)(b) inserted (E., but only in relation to excepted energy buildings in W.) (1.10.2015) by The Building Regulations &c. (Amendment) Regulations 2015 (S.I. 2015/767), regs. 1(4)(b), 2(3)(a) (with regs. 1(3), 4) [Editorial note: This amendment no longer applies at all in relation to W. from 8.6.2018]

[^key-33ca85688167c01307416b96555febc6]: Words in reg. 27B(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(15)(c) (with reg. 1(3))

[^key-34150e5968afd5c8a054eb83297c0f06]: Word in reg. 2(1) omitted (E., but only in relation to excepted energy buildings in W.) (6.4.2016) by virtue of The Building Regulations &c. (Amendment) Regulations 2016 (S.I. 2016/285), regs. 1(4), 2(2)(a) (with reg. 1(3))

[^key-347cea0a9cb2571458c1b8015457a1c5]: Reg. 9(4) inserted (E., but only in relation to excepted energy buildings in W.) (9.5.2016) by The Building (Amendment) Regulations 2016 (S.I. 2016/490), regs. 1(4), 2(2)(b) (with regs. 1(3), 3) [Editorial note: This amendment no longer applies at all in relation to W. from 8.6.2018]

[^key-349114e1194b96d9b41a167a1ae6bb59]: Reg. 25D inserted (W.) (23.11.2022) by The Building (Amendment) (Wales) Regulations 2022 (S.I. 2022/564), regs. 1(3), 7 (with reg. 21)

[^key-3568b465e50c4ebcfeb19d101002e0b0]: Words in reg. 16(2) substituted (1.10.2023) by The Building Regulations etc. (Amendment) (England) Regulations 2023 (S.I. 2023/911), regs. 1(2), 7(5)(a) (with regs. 22-24)

[^key-35a4e099c64a2e8f41f171e5a4f87315]: Words in reg. 9(1) substituted (W. but not in relation to excepted energy buildings) (8.4.2016) by The Building (Amendment) (Wales) Regulations 2016 (S.I. 2016/361), regs. 1(4), 2(2)(a) (with regs. 1(3), 3)

[^key-35ef1c8fc504c0c3200f8ad144e11d0b]: Sch. 1 Pt. R heading substituted (W.) (1.7.2025) by The Building etc. (Amendment) (Wales) Regulations 2025 (S.I. 2025/377), regs. 1(3), 4(4)(a) (with reg. 3)

[^key-36373106a5166294bf4341dc4789cfab]: Words in Sch. 3 omitted (E., but only in relation to excepted energy buildings in W.) (1.10.2017) by virtue of The Building (Amendment) Regulations 2017 (S.I. 2017/856), regs. 1(2)(a), 2(a) (with reg. 1(2))

[^key-3691cea6b7829d1685b6963dd729d06a]: Words in reg. 16(3) substituted (1.10.2023) by The Building Regulations etc. (Amendment) (England) Regulations 2023 (S.I. 2023/911), regs. 1(2), 15(1)(c) (with regs. 22-24)

[^key-36ff839f4231f605fe1d2dfafbd7c578]: Word in Sch. 3 para. 18 substituted for comma (W.) (23.11.2022) by The Building (Amendment) (Wales) Regulations 2022 (S.I. 2022/564), regs. 1(3), 17(2)(r) (with reg. 21)

[^key-374a231133c37d6105dacd65becd7dc6]: Words in reg. 18E(2)(c) substituted (6.4.2024) by The Building (Registered Building Control Approvers etc.) (England) Regulations 2024 (S.I. 2024/110), regs. 1(3), 38(4) (with reg. 38(8))

[^key-376a3a90801cfc89679d9a92929d0ff7]: Words in Sch. 3 omitted (E., but only in relation to excepted energy buildings in W.) (1.10.2017) by virtue of The Building (Amendment) Regulations 2017 (S.I. 2017/856), regs. 1(2)(a), 2(c) (with reg. 1(2))

[^key-37b7f595b8b83bb096a71f585e72a1d8]: Word in reg. 27B(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(15)(b) (with reg. 1(3))

[^key-380ab574c7eb6e3e631bacf3b261c908]: Words in reg. 21(3)(a)(i) inserted (W.) (4.11.2024) by The Historic Environment (Wales) Act 2023 (Consequential Provision) (Secondary Legislation) Regulations 2024 (S.I. 2024/924), regs. 1(2), 50(a)

[^key-38572a1a20942e685724ab47f2e4ecca]: Words in Sch. 1 Pt. L inserted (E.) (15.6.2022) by The Building Regulations etc. (Amendment) (England) Regulations 2021 (S.I. 2021/1391), regs. 1(1), 11(a) (with regs. 1(2), 17) (as amended (5.6.2023) by S.I. 2023/520, regs. 1(2), 3)

[^key-38670b78db4eb9d68c7c610e77594a04]: Words in reg. 18C(1)(a) inserted (7.10.2025) by The Building Regulations etc. (Amendment) (England) Regulations 2025 (S.I. 2025/1017), regs. 1(2), 10(3)

[^key-38ea9902419939918e72c2a2df741cf2]: Words in Sch. 3 para. 15 omitted (W. for remaining purposes) (15.1.2018) by virtue of The Building (Amendment) (Wales) Regulations 2017 (S.I. 2017/1274), regs. 1(2)(a), 2(3)(a) (with reg. 1(3))

[^key-398d91a594833f54c7422965b276ef23]: Reg. 16(5A) inserted (E.) (1.10.2023) by The Building Regulations etc. (Amendment) (England) Regulations 2023 (S.I. 2023/911), regs. 1(2), 6(2)(d) (with regs. 22-24)

[^key-39eaa10b5cd66b32f06ef079ca5c4982]: Reg. 44ZA applied (with modifications) by S.I. 2010/2215, reg. 20(1)(6A) (as inserted (E.) (15.6.2022) by The Building Regulations etc. (Amendment) (England) Regulations 2021 (S.I. 2021/1391), regs. 1(1), 16 (with regs. 1(2), 17)) (as amended (5.6.2023) by S.I. 2023/520, regs. 1(2), 3)

[^key-3a350c095baeb023a047fd304d18b511]: Words in reg. 27A(4) substituted (E.) (1.10.2023) by The Building Regulations etc. (Amendment) (England) Regulations 2023 (S.I. 2023/911), regs. 1(2), 7(13)(b) (with regs. 22-24)

[^key-3b02b394a15eaa3fe7fde5024a93d14a]: Words in reg. 35 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), 8 (with reg. 1(3)) [Editorial note: This amendment no longer applies at all in relation to W. from 8.6.2018]

[^key-3b2534e1f2ca44bdbb4849ccde4bd115]: Words in reg. 16(5) substituted (E.) (1.10.2023) by The Building Regulations etc. (Amendment) (England) Regulations 2023 (S.I. 2023/911), regs. 1(2), 7(5)(a) (with regs. 22-24)

[^key-3bd3e9818fb6de23b64c058b9419a0b6]: Words in reg. 27B(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(15)(e) (with reg. 1(3))

[^key-3bdb4a605245256d4bdb5c689185864b]: Word 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))

[^key-3c12c4c36730b0f43e53fe6ce7dc6e06]: Words in Sch. 2 Class 7 substituted (W. in relation to excepted energy buildings) (8.6.2018) by The Building Regulations &c. (Amendment) (Excepted Energy Buildings) (Wales) Regulations 2018 (S.I. 2018/558), regs. 1(2), 14 (with reg. 29)

[^key-3c5013f3f9c9f545104b0312358a335e]: Words in reg. 15(3) substituted (E.) (1.10.2023) by The Building Regulations etc. (Amendment) (England) Regulations 2023 (S.I. 2023/911), regs. 1(2), 7(4)(c)(i) (with regs. 22-24)

[^key-3d1fac27f015ed14da20cce897cf6f25]: Words in reg. 20(5) omitted (E., but only in relation to excepted energy buildings in W.) (6.4.2014) by virtue of The Building Regulations &c. (Amendment) Regulations 2014 (S.I. 2014/579), regs. 1(4), 2(5)(b) (with reg. 1(3)) [Editorial note: This amendment no longer applies at all in relation to W. from 8.6.2018]

[^key-3d58fbb2838a0e9941dfc639d43bb22f]: Words in reg. 44C inserted (26.12.2022) by The Building etc. (Amendment) (England) (No. 2) Regulations 2022 (S.I. 2022/984), reg. 1(4), Sch. para. 6(3) (with reg. 3)

[^key-3d9e5fcedce1ded8c36cb287c5cd1e33]: Words in reg. 11(3) inserted (E., but only in relation to excepted energy buildings in W.) (9.5.2016) by The Building (Amendment) Regulations 2016 (S.I. 2016/490), regs. 1(4), 2(3) (with regs. 1(3), 3) [Editorial note: This amendment no longer applies at all in relation to W. from 8.6.2018]

[^key-3df5523f10932bc786ba0c20f34009dd]: Reg. 35(2) omitted (W. for remaining purposes) (17.6.2016) by virtue of The Building Regulations &c. (Amendment) (Wales) Regulations 2016 (S.I. 2016/611), regs. 1(4), 2(19)(b) (with reg. 1(3))

[^key-3e8c04c847158d40af250a7d4a67950d]: Reg. 46 omitted (E.) (1.10.2023) by virtue of The Building Regulations etc. (Amendment) (England) Regulations 2023 (S.I. 2023/911), regs. 1(2), 14(2) (with regs. 22-24)

[^key-3ec133d36cc4fb175a6dafff71090cbf]: Words 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))

[^key-3f1272fcc2e22a953fad25a1d300b668]: Words in Sch. 3 para. 14 omitted (W. for remaining purposes) (15.1.2018) by virtue of The Building (Amendment) (Wales) Regulations 2017 (S.I. 2017/1274), regs. 1(2)(a), 2(3)(a) (with reg. 1(3))

[^key-3f30cb9ce9a984f0381fcc1570ee29d1]: Words in reg. 12(4) substituted (E.) (1.10.2023) by The Building Regulations etc. (Amendment) (England) Regulations 2023 (S.I. 2023/911), regs. 1(2), 7(2)(c) (with regs. 22-24)

[^key-3f72cb62454cd1212c0d4e2db48f51d2]: Reg. 44 modified (E.) (6.4.2024) by The Building (Registered Building Control Approvers etc.) (England) Regulations 2024 (S.I. 2024/110), regs. 1(3), 5(10) (with regs. 44-47)

[^key-4064cf32644572a4e193531726c64c1c]: Reg. 44ZA inserted (E.) (15.6.2022) by The Building Regulations etc. (Amendment) (England) Regulations 2021 (S.I. 2021/1391), regs. 1(1), 10 (with regs. 1(2), 17) (as amended (5.6.2023) by S.I. 2023/520, regs. 1(2), 3)

[^key-406517649f9631285617642ee41d67db]: Words in reg. 2(1) inserted (E., but only in relation to excepted energy buildings in W.) (1.10.2015) by The Building Regulations &c. (Amendment) Regulations 2015 (S.I. 2015/767), regs. 1(4)(b), 2(2)(a) (with reg. 1(3)) [Editorial note: This amendment no longer applies at all in relation to W. from 8.6.2018]

[^key-412f7fc8b97df482dfae8860b421154a]: Reg. 26A (as previously amended by S.I. 2014/110, regs. 1(3), 6 and S.I. 2016/611, regs. 1(4), 2(11)) substituted (W. for remaining purposes) (8.6.2018) by The Building Regulations &c. (Amendment) (Excepted Energy Buildings) (Wales) Regulations 2018 (S.I. 2018/558), regs. 1(2), 7(4) (with reg. 29)

[^key-418b5d2312d8d690d6b3e6f792fa7014]: Reg. 25A(2) substituted (E.) (1.10.2023) by The Building Regulations etc. (Amendment) (England) Regulations 2023 (S.I. 2023/911), regs. 1(2), 7(11)(a) (with regs. 22-24)

[^key-418e64fc555cc1fdae649e3ecf5003d0]: Words in reg. 27(4) substituted (E.) (1.10.2023) by The Building Regulations etc. (Amendment) (England) Regulations 2023 (S.I. 2023/911), regs. 1(2), 7(12)(b) (with regs. 22-24)

[^key-4280b5c5b8902070d39c08c94dd87dfe]: Words in reg. 16(3B) substituted (1.10.2023) by The Building Regulations etc. (Amendment) (England) Regulations 2023 (S.I. 2023/911), regs. 1(2), 7(5)(a) (with regs. 22-24)

[^key-42a95ec04954982e887205f92fd0e0df]: Words 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))

[^key-43165777b508d866ae0bf2c240a1f15f]: Words in reg. 11(3) omitted (E., but only in relation to excepted energy buildings in W.) (6.4.2016) by virtue of The Building Regulations &c. (Amendment) Regulations 2016 (S.I. 2016/285), regs. 1(4), 2(4) (with reg. 1(3))

[^key-43739ba30deab2fc8713320701800a98]: Word in reg. 13(1)(b) inserted (W. in relation to excepted energy buildings) (8.6.2018) by The Building Regulations &c. (Amendment) (Excepted Energy Buildings) (Wales) Regulations 2018 (S.I. 2018/558), regs. 1(2), 5(2)(a)(i) (with reg. 29)

[^key-437bfdb83c051ab95270d897a5466888]: Regs. 44ZB, 44ZC inserted (E.) (26.12.2022) by The Building etc. (Amendment) (England) (No. 2) Regulations 2022 (S.I. 2022/984), reg. 1(4), Sch. para. 5 (with reg. 3)

[^key-43cba1ab24fb7e0c572308c087710865]: Word in Sch. 3 para. 19 substituted for comma (W.) (23.11.2022) by The Building (Amendment) (Wales) Regulations 2022 (S.I. 2022/564), regs. 1(3), 17(2)(s) (with reg. 21)

[^key-4436ac2c4958ebad215a2ad8b01e49d9]: Words in reg. 25C(a) omitted (W.) (23.11.2022) by virtue of The Building (Amendment) (Wales) Regulations 2022 (S.I. 2022/564), regs. 1(3), 6(a)(i) (with reg. 21)

[^key-449cb10daafe0e117939e69efcbee668]: Reg. 27(4A) inserted (E.) (1.10.2023) by The Building Regulations etc. (Amendment) (England) Regulations 2023 (S.I. 2023/911), regs. 1(2), 7(12)(c) (with regs. 22-24)

[^key-4588b6441804f80e4c0109ec4c6c7708]: Words in reg. 41(3A) substituted (6.4.2024) by The Building (Registered Building Control Approvers etc.) (England) Regulations 2024 (S.I. 2024/110), regs. 1(3), 38(5)

[^key-46320fc34714c63abf35d3cdd2e8bce7]: Words in reg. 18(7) substituted (1.10.2023) by The Building Regulations etc. (Amendment) (England) Regulations 2023 (S.I. 2023/911), regs. 1(2), 7(8)(c) (with regs. 22-24)

[^key-4645aacd3e6fdebd3b38d42bfa67bcd9]: Reg. 18(8) substituted (E.) (1.10.2023) by The Building Regulations etc. (Amendment) (England) Regulations 2023 (S.I. 2023/911), regs. 1(2), 7(8)(d) (with regs. 22-24)

[^key-467af5648d276f002d3e512cd6a640c2]: Reg. 46A inserted (E.) (1.10.2023) by The Building Regulations etc. (Amendment) (England) Regulations 2023 (S.I. 2023/911), regs. 1(2), 15(2) (with regs. 22-24)

[^key-46c21a1778de98a93a23fcddfa91fbf6]: Words in Sch. 3 para. 10 omitted (W. but not in relation to excepted energy buildings) (28.2.2018) by virtue of The Building (Amendment) (Wales) Regulations 2017 (S.I. 2017/1274), regs. 1(2)(b), 2(3)(b)(ii) (with reg. 1(3))