http://www.legislation.gov.uk/ukpga/1984/55/section/120FBuilding Act 1984 An Act to consolidate certain enactments concerning building and buildings and related matters.1984-10-31texttext/xmlenStatute Law Database2026-03-06Expert Participation2026-01-27 Building Act 1984s. 131ABuilding Safety Act 2022s. 59s. 170(4)(c)Building Act 1984s. 95(5)Building Safety Act 2022s. 60(2)s. 170(4)(c)Building Act 1984s. 131BBuilding Safety Act 2022s. 60(3)s. 170(4)(c)Building Act 1984Sch. 1 para. 7A(4)Building Safety Act 2022Sch. 5 para. 83(5)s. 170(4)(b)(c)reg. 2(n)(xxxiii)reg. 2(d)(xi)Sch.reg. 348- 12Building Act 1984s. 44(11)Sustainable and Secure Buildings Act 2004s. 3(8)s. 11(3)Building Act 1984ActThe Building etc. (Amendment) (No. 2) (Wales) Regulations 2025Rheoliadau Adeiladu etc. (Diwygio) (Rhif 2) (Cymru) 2025reg. 21reg. 1(2)Building Act 1984s. 1(1A)(d)Infrastructure Act 2015s. 37(2)s. 57(5)(a)Building Act 1984Sch. 1 para. 7AInfrastructure Act 2015s. 37(4)s. 57(5)(a) Part IV120F1This section applies if the Secretary of State proposes to make regulations under section 120D that would result in a description of building (including anything within subsection (5) of that section) becoming a higher-risk building for the purposes of this Act as it applies in relation to England.2The Secretary of State must ask the regulator under section 120H(1) for advice about the description of building, except where the regulations would give effect to a recommendation under section 120G(2).3The Secretary of State must carry out a cost-benefit analysis and publish it.4In this section “cost-benefit analysis” means—aan analysis of the costs together with an analysis of the benefits that will arise if the regulations are made, andban estimate of those costs and of those benefits (subject to subsection (5)).5If, in the opinion of the Secretary of State—athe costs or benefits cannot reasonably be estimated, orbit is not reasonably practicable to produce an estimate,the cost-benefit analysis need not estimate them, but must include a statement of the Secretary of State’s opinion and an explanation for it.Ss. 120D-120I and cross-heading inserted (28.6.2022 so far as it relates to ss. 120D-120H, 9.12.2022 so far as it relates to s. 120I) by Building Safety Act 2022 (c. 30), ss. 31, 170(4)(a)(c); S.I. 2022/561, reg. 3(d); S.I. 2022/1287, reg. 2(a)