# The Town and Country Planning (General Permitted Development) (Amendment) (Wales) Order 2013, Paragraph B.4: Interpretation of Class B


In determining the height of the highest part of the existing roof for the purposes of paragraph B.1(a), no account is to be taken of any parapet wall, firewall, chimney or other roof furniture or similar structure projecting from that roof.

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Source: https://www.legislation.gov.uk/wsi/2013/1776/schedule/paragraph/B.4 (the official version)
Page: https://openlegislation.uk/town-and-country-planning-general-permitted-development-amendment-wales-order-2013/schedule/paragraph-B.4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.