Prior Approval of a Proposed Larger Home Extension

Important notes

This template can be used by a householder to notify the local planning authority of the intention to build a larger single-storey rear extension as described on the Extensions common project page. Please read the guidance note for help completing the notification.

Applications for Prior Approval of a Proposed Larger Home Extension should be submitted in accordance with the requirements in this checklist. If not, the application may be declared invalid and not determined or processing may be delayed.

If the application is submitted electronically one copy of the form and each of the drawings, plans and documentation will be required but two copies (one original and one copy) will be required if the application is submitted in paper form. If samples of materials are submitted, only one sample of each of the materials will be required.

Drawings should include information clearly stating the orignal size of the paper and include a scale bar indicating a minimum 0-10 metres. This is to enable them to be accurately read online. Plans marked with "do not scale" or any similar phrase will be returned as unacceptable as for planning purposes we must be able to scale from all drawings.

Legislation allowing larger single-storey rear extensions to be built under permitted development rules came in to force on 30 May 2013, and was subsequently updated by new legislation which came into effect on 6 April 2016. The new size limits will be subject to a neighbour consultation scheme.

There is a requirement to notify the local planning authority if you wish to build a larger single-storey rear extension under these new rules. The Council has provided a form designed to ensure that you provide the information required by the legislation.

Please note that for the larger single-storey rear extensions no work should commence until you have received notification from the Council that prior approval has been granted.

To benefit from these new permitted development rights the extension must be completed on or before 30 May 2019. The local planning authority must be notified in writing of the date of completion. The Council has provided a form designed to ensure that you provide the information required by the legislation.

Notification form for completion of larger rear extensions

Find out more about the new size limits and the neighbour consultation scheme

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Definition of "original house"

The term "original house" as mentioned in the guidance on permitted development means the house as it was first built or as it stood on 1 July 1948 (if it was built before that date).

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National requirements

Before beginning the development the developer shall provide the following information to the local planning authority.

  • A written description of the proposed development including:
  • how far the enlarged part of the dwellinghouse extends beyond the rear wall of the original dwellinghouse;
  • the maximum height of the enlarged part of the dwellinghouse;
  • and the height of the eaves of the enlarged part of the dwellinghouse;
  • a plan indicating the site and showing the proposed development;
  • the addresses of any adjoining premises;
  • the developers contact address;
  • the developers email address if the developer is content to receive communications electronically.

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Local requirements

The application form below can be used to notify the local planning authority of the intention to build a larger single-storey rear extension as described here. Please read the guidance note for help completing the notification.

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Printable application form

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Guidance on completing application form

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Fees