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Class N – specified sui generis uses to dwellinghouses

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What is allowed

Development consisting of—
a change of use of a building and any land within its curtilage from a use as
an amusement arcade or centre, or
a casino,
to a use falling within Class C3 (dwellinghouses) together with building operations reasonably necessary to convert the building to a use falling within Class C3 (dwellinghouses).

Where can I use it

On buildings that are an amusement arcade or centre, or a casino and subject to defined limits.

What is not allowed

Development is not permitted by Class N if—

  • the building was not used solely for one of the uses specified in Class N(a) on 19th March 2014, or in the case of a building which was in use before that date but was not in use on that date, when it was last in use;
  • the cumulative floor space of the existing building changing use under Class N exceeds 150 square metres;
  • the development (together with any previous development under Class N) would result in more than 150 square metres of floor space in the building having changed use under Class N;
  • the development under Class N(b) would consist of building operations other than the installation or replacement of—
  • (aa) windows, doors, roofs, or exterior walls, or
  • (bb) water, drainage, electricity, gas or other services, to the extent reasonably necessary for the building to function as a dwellinghouse; and
  • partial demolition to the extent reasonably necessary to carry out building operations;
  • the building is within—
  • an area of outstanding natural beauty;
  • an area specified by the Secretary of State for the purposes of section 41(3) of the Wildlife and Countryside Act 198155;
  • the Broads;
  • a National Park; or
  • a World Heritage Site;
  • the site is, or forms part of—
  • a site of special scientific interest;
  • a safety hazard area;
  • a military explosives storage area;
  • the building is a listed building or is within the curtilage of a listed building; or
  • the site is, or contains, a scheduled monument.
How do I use the allowance

This is a prior approval permitted development allowance and subject to the following decision making criteria:

  • transport and highways impacts of the development,
  • contamination risks in relation to the building,
  • flooding risks in relation to the building, and
  • the design or external appearance of the building,, and
  • the provision of adequate natural light in all habitable rooms of the dwellinghouses,
  • compliance with the National Standards (from 6th April 2021)
Our Notes


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