Planning for conservatories, garages and lofts
Planning for conservatories, garages and lofts

The following Planning guidance note provides comprehensive and up to date legal information covering:

  • Planning for conservatories, garages and lofts
  • Conservatories
  • Garage conversions
  • Loft conversions
  • Article 4 Directions
  • Listed building consent
  • Community Infrastructure Levy

Many small domestic extensions to dwellinghouses benefit from permitted development rights and do not require planning permission if they meet specific criteria.


Conservatories are extensions to dwellinghouses that incorporate glass walls and roofs.

Planning permission—England

In England, adding a conservatory to a dwellinghouse is permitted development, provided that:

  1. no more than half of the area of land around the 'original dwelling' (ie the house as it was first built or as it stood on 1 July 1948, if it was built before that date) is covered by additions or other buildings

  1. no part of the extension forward of the principal elevation or side elevation fronts a highway

  2. no part of the extension is higher than the highest part of the roof

  3. the maximum depth of a single-storey rear extension is no more than three metres for an attached house and four metres for a detached house. In addition, with the exception of Article 1(5) 'designated land' (ie national parks and the Broads, Areas of Outstanding Natural Beauty, conservation areas and World Heritage Sites) and Sites of Special Scientific Interest, the limit is increased to six metres for an attached house and eight metre for a detached house until 30 May 2016. These increased limits are subject to prior approval by the local planning authority. See Practice Note: Permitted development