Current
Core Supplement
Explanatory Memorandum
Relates to SI 2020/1459, which amends Class A and Class AA of Part 20 of Schedule 2 to the General Permitted Development Order to require confirmation that the external wall construction of an existing building, which are 18 metres or more in height, meets building regulations in respect of fire safety, before extending upwards.
Prepared by the Ministry of Housing, Communities and Local Government (MHCLG).
NBS has produced specification systems and information products for construction industry professionals for more than 40 years. The National Building Specification is the recognised UK national standard and is used by over 5,000 organisations. NBS is part of RIBA Enterprises Ltd.
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