# Town and Country Planning Act 1990, Paragraph 10

Extent: E+W

(1) Any reference in this Schedule to the cubic content of a building shall be construed as a reference to that content as ascertained by external measurement.
(2) For the purposes of paragraph 1 the cubic content of a building is substantially increased or exceeded—
(a) in the case of a dwellinghouse, if it is increased or exceeded by more than one-tenth or 1,750 cubic feet, whichever is the greater; and
(b) in any other case, if it is increased or exceeded by more than one-tenth.

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Source: https://www.legislation.gov.uk/ukpga/1990/8/schedule/3/paragraph/10 (the official version)
Page: https://openlegislation.uk/town-and-country-planning-act-1990/schedule-3/paragraph-10
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.