# The Town and Country Planning (General Permitted Development) (Scotland) Order 1992, Paragraph 18A: Water Management


(1) The carrying out of ... drainage for agriculture or of any other water management project for that purpose , but not including the carrying out of irrigation work.
(2) Development consisting of the erection of a building or the significant extension or significant alteration of a building is permitted by this class subject to the conditions set out in Class 18(4)(a); and development consisting of the significant extension or the significant alteration of a building may be carried out only once in respect of that building.

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Source: https://www.legislation.gov.uk/uksi/1992/223/schedule/1/class/18A (the official version)
Page: https://openlegislation.uk/town-and-country-planning-general-permitted-development-scotland-order-1992/schedule-1/class/18A
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.