Basement conversion Regulations Back to Blog

Basement conversion Regulations

Basement conversion Regulations

The planning regime that covers the conversion of basements into living spaces is currently under review and is subject to change. Due to this, we highly recommend that you seek advice from your Local Planning Authority to establish any permissions that you may need.

Converting an existing basement

Basement planning permission is rarely needed and it’s unlikely to be needed after the basement planning permission review, if:

  1. You are carrying out like-for-like repairs and maintenance
  2. You are converting an existing residential basement into a living space
  3. The conversion will not significantly change the basement’s usage and structure

If you are in any doubt about converting an existing basement, you should always contact your Local Planning Authority for guidance.

New basements

Excavating and creating a basement where there wasn’t one before will require planning permission, no matter its size. The creation of a basement requires a high level of expertise and several factors must be taken into account, including damp, lighting, air flow, and fire and safety.

Planning permission is only granted if your new basement meets the planning permission guidelines covering the areas above. Prior to excavating and starting work on your project, we strongly recommend that you consult with your Local Planning Authority for guidance on your local policy.

Listed buildings

In all circumstances, you must be granted Listed Building Consent to carry out any work on your listed property that is likely to change its internal or external structure. We advise you to contact your Local Planning Authority for advice no matter what type of property you live in. The regulations for basement conversions are evolving and they are currently under review, therefore the advice that your planning authority can give you is invaluable.

For more information on basement planning permission, visit The Planning Portal.

The information contained within this article is strictly for guidance only.  Cost2Build recommends that you always check current sources of information in case regulations have changed. Cost2Build cannot accept any liability for miscommunication of the law in the case of a change in regulation or any action done to a property based on the information held in this article.

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