Planning for Single Storey Rear Extensions

This is a question that we hear time and time again.  As a general rule of thumb provided the extension meets the requirements as set out in the Town and Country Permitted Development order (provided below) then it is unlikely that your extension will require planning permission.

Please note, if you live in a flat or a maissonette then full planning permission will be required.  You may also need to obtain freeholder or landlord consent for the works.

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Building Regulations

All extensions will require building regulations approval.  Even if there is no need to notify your planning office, you will need to notify building control of the build.

Building control approval consists of two processes.  The first involves submitting a set of building regulations drawings into your local authority for approval before commencement of works on site.

The second stage of the approval process consists of building inspector visiting site during key stages of the build to sign off the contractors work.

Provided the building inspector is happy with the work carried out on site they will issue a completion certificate to yourself/your contractor after their final visit at the end of the build.

This guidance below reflects increases to the size limits for single-storey rear extensions which apply between 30 May 2013 and 30 May 2019, and the associated Neighbour Consultation Scheme

* 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.

* Designated land includes national parks and the Broads, Areas of Outstanding Natural Beauty, conservation areas and World Heritage Sites.