Basement Conversions Building Regulations

Last updated: 05 Nov 2022

If you are considering converting your basement or cellar it might be worth finding out if there are any planning permission issues or basement conversions building regulations matters to be investigated first.

Basement Conversions Building Regulations

Basement conversions building regulations

For some basement conversions planning permission may be required which will add an additional administrative cost on top of your conversion cost. When planning a conversion, it is best to seek professional advice on building regulations and to speak to your local council to see if you need planning permission. Depending on your local council, the average cost of a building regulations application can cost around £750 with a planning permission application costing around £165. These costs are not generally included in the estimated cost for your basement conversion quote so check over the quote and its inclusions carefully.

If you are considering converting your basement or cellar it might be worth finding out if there are any planning permission issues or basement conversions building regulations matters to be investigated first.

Remember, if planning permission or building regulations approval is not sought and works are carried out, completed or part completed projects may be in jeopardy.

You could run into trouble over your property renovation.

It is always wise to carry out due diligence when undertaking any home improvement works and finding out whether there are any changes to legislation and what the current legislation is regarding your particular proposed project.

Planning Permission Relating To Basement Conversions / Cellar Conversions

Architect rolls and plans blueprints home building conceptFirst and foremost you should know that if you live in a listed building or conservation area you should always consult building control or your local planning office before undertaking works as more often than not you will require planning permission for most property renovation or remedial works.

If you are converting an existing residential property's cellar or basement into living space you should not normally require planning permission to carry out these works.

However, if the conversion you are undertaking is likely to change the exterior of the property (for example adding a window / light well), then you may need planning permission and should consult building control.

If you intend to excavate an area or dig below footings to convert a cellar or basement or if the work you are carrying out to your cellar is likely to be considered major works then you may well need planning permission.

Again, building control should be able to advise accordingly.

Any general changes to the exterior of your property or to the area in general will need to be discussed with your local planning office.

The legislation regarding cellar conversions and basement conversions is constantly changing.

It is wise to keep abreast of these developments regarding basement conversions building regulations before undertaking any works.

A good basement conversion or cellar conversion contractor may have information which might be useful for you.

However it is always better to take advice from impartial authorities and official bodies such as your local planning office or building control over contractors who might be inclined to sell you on having works carried out.

Miniature House With Various Drafting Items and Plans.

Building Regulations Relating To Basement Conversions / Cellar Conversions

Basement and cellar conversions are subject to Building Regulations covering the following areas:

  • Means of Escape
  • Fire Safety Matters
  • Ventilation Issues
  • Lighting
  • Height of Ceilings
  • Electrical Wiring And Safety

If In Doubt?

Contact your local building control to discuss your proposals and to take proper advice.

Top Tradespeople do not accept any responsibility for the accuracy of this information.

Professional advice should always be sought if in doubt prior to commencing any home improvement projects.