Building Regulations And Planning Application Information For A Solid or Tiled Conservatory Roof

Most new-build conservatories with either a solid, tiled or glazed roof will not need planning permission, because they are covered under what is known as a ‘permitted development’. If these measures are not put in place, the conservatory is technically an extension and separate Building Regulations apply.

New conservatories and porches less than 30m2 in floor area and thermally separated from the main house with external quality doors and windows are exempt from the requirements of the Building Regulations 2010 (as amended).

However if you are planning to re roof an existing conservatory with a solid roof rather than translucent roof, then a Building Regulation Application is required. This is because conservatories and porches are traditionally light weight in nature and not generally designed to carry the wight of a solid roof.
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The increased size limits for single-storey rear extensions that were previously time limited and due to expire on 30 May 2019 have now been made permanent by government.

Any such proposals will still be subject to the associated neighbour consultation scheme. This requires that the relevant Local Planning Authority is informed of the proposed work via a prior approval application.

Adding a conservatory to your house is considered to be permitted development, not needing an application for planning permission, subject to the limits and conditions listed below:

  • No more than half the area of land around the “original house”* would be covered by additions or other buildings.   
  • No extension forward of the principal elevation or side elevation fronting a highway.
  • No extension to be higher than the highest part of the roof.
  • Single-storey rear extensions must not extend beyond the rear wall of the original house* by more than eight metres if a detached house; or more than six metres for any other house.
  • If the house is in Article 2(3) designated land* or a Site of Special Scientific Interest, this limit is reduced to four metres if a detached house; or three metres for any other house.
  • These limits are now permanent and subject to the neighbour consultation scheme. This requires that the relevant Local Planning Authority is informed of the proposed work via a prior approval application.
  • Maximum height of a single-storey rear extension of four metres.
  • Extensions of more than one storey must not extend beyond the rear wall of the original house* by more than three metres or be within seven metres of any boundary opposite the rear wall of the house.
  • Maximum eaves height of an extension within two metres of the boundary of three metres.
  • Maximum eaves and ridge height of extension no higher than existing house.
  • Side extensions to be single storey with maximum height of four metres and width no more than half that of the original house.
  • Roof pitch of extensions higher than one storey to match existing house.
  • No verandas, balconies or raised platforms.
  • On Article 2(3) designated land* no permitted development for rear extensions of more than one storey.
  • On Article 2(3) designated land* no cladding of the exterior.
  • On Article 2(3) designated land* no side extensions.
* The term “original house” means the house as it was first built or as it stood on 1 July 1948 (if it was built before that date). Although you may not have built an extension to the house, a previous owner may have done so.

* Article 2(3) designated land is land within:

  • a conservation area; or
  • an area of outstanding natural beauty; or
  • an area specified by the Secretary of State for the purposes of enhancement and protection of the natural beauty and amenity of the countryside; or
  • the Broads; or
  • a National Park; or
  • a World Heritage Site
Please note: The permitted development allowances described here apply to houses and not to:

  • Flats and maisonettes (view our guidance on flats and maisonettes)
  • Converted houses or houses created through the permitted development rights to change use (as detailed in our change of use section)
  • Other buildings
  • Areas where there may be a planning condition, Article 4 Direction or other restriction that limits permitted development rights.
  • Where work is proposed to a listed building, listed building consent may be required.

Please be aware that if your development is over 100 square metres, it may be liable for a charge under the Community Infrastructure Levy

JHAI Certified

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JHAI Make Sure The Company You Choose Are Able To Confirm:

  • That Their System Is Suitable For Your Conservatory
  • That Your Conservatory Has Adequate Foundations
  • That Your Current Frames and Doors Are Reinforced
  • That You Will Receive A Building Control Certificate On Work Carried Out

Certass operate one of the only government approved building control scheme that cuts out the need to go to your local authority…