# The Town and Country Planning (General Permitted Development) (Scotland) Order 1992, Paragraph 1D: Enlargement of a dwellinghouse


(1) Any enlargement of a dwellinghouse by way of an addition or alteration to its roof.
(2) Development is not permitted by this class if—
(za) the dwellinghouse is a dwelling by virtue of a change of use permitted under class 18B or 22A,
(a) it would be on a roof plane forming part of the principal elevation or side elevation where that elevation fronts a road;
(b) it would be on a roof plane and would be within 10 metres of the boundary of the curtilage of the dwellinghouse which that roof plane fronts;
(c) as a result of the development the height of the dwellinghouse would exceed the height of the existing dwellinghouse, when measured at the highest part of the roof and excluding any chimney;
(d) its width would exceed half the total width of the roof plane, measured at the eaves line, of the dwellinghouse;
(e) any part of the development would be within 0.3 metres of any edge of the roof plane of the dwellinghouse; or
(f) it would be within a conservation area.

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Source: https://www.legislation.gov.uk/uksi/1992/223/schedule/1/class/1d (the official version)
Page: https://openlegislation.uk/town-and-country-planning-general-permitted-development-scotland-order-1992/schedule-1/class/1d
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.