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Check if you need planning permission

Find out if you'll need permission for the work you're planning

Permitted developments

Some minor alterations and extensions, particularly to houses, can often be carried out without the need for planning permission. This is known as permitted development.

To help you decide whether you need planning permission, the Planning Portal have developed interactive guides. These will help guide you through the planning and building rules for various house types and single mini guides for conservatories, extensions, loft conversions, outbuildings and porches.

Open the Planning Portal interactive guides

Lawful development certificate

If you think that planning permission is not required, but you would like the comfort of us having confirmed that, you can apply for a lawful development certificate. There is a charge for this service. The government sets the charges, and they apply across the country. For the most up-to-date scale of fees for planning and other applications please visit Fee Calculator (

To apply for a lawful development certificate you'll need:

  • a site plan
  • a valid debit or credit card for the fee

Apply for a lawful development certificate

Additional permissions

As well as getting planning permission, and complying with building regulations, you may also need additional permissions for the development to proceed.

Find out more about the most common additional consents on the Planning Portal.

Further information

If you're still not sure if you need permission, you may be able to get advice from us. Please visit our get advice before making an application page for further details.