# The Building Regulations 2010, Paragraph


where the floor area of that extension does not exceed 30m2, provided that in the case of a conservatory or porch which is wholly or partly glazed, the glazing satisfies the requirements of Part K4, K5.1, K5.2, K5.3, and K5.4 Part N of Schedule 1.

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Source: https://www.legislation.gov.uk/uksi/2010/2214/schedule/2/part/7/paragraph/wrapper3n1 (the official version)
Page: https://openlegislation.uk/building-regulations-2010/schedule-2/part-7/paragraph-wrapper3n1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.