Northern Territory Consolidated Acts Northern Territory Consolidated Acts43B. Issue or refusal to issue alteration permit
(1) The consent authority may issue an alteration permit only if:
(a) the proposed alteration will not alter a measurable aspect of the existing building or existing works by a margin greater than 5% and, in the opinion of the consent authority, will not materially affect the amenity of adjoining or nearby land or premises; or
(b) in the opinion of the consent authority, the proposed alteration is not conveniently measurable and will not materially affect the amenity of adjoining or nearby land or premises.
(2) Despite subsection (1)(a), an alteration permit must not be issued if it will allow an increase in the number of dwellings capable of separate occupancy.
(3) If the consent authority refuses to issue an alteration permit, the consent authority must give the applicant a statement of the reasons for the refusal.