Class G
Permitted development
G. The installation, alteration or replacement of a chimney on a dwellinghouse.
Development not permitted
G.1. Development is not permitted by Class G if—
(a)the height of the chimney would exceed the highest part of the roof by 1 metre or more; or
(b)the dwellinghouse is located on article 1(5) land or within a World Heritage Site.
Interpretation of Class G
G.2. In determining the height of the highest part of the roof for the purposes of paragraph G.1(a), no account is to be taken of any parapet wall, firewall, chimney or other roof furniture or similar structure projecting from the roof.