While planning permission covers how a building looks, building regulations make sure your home is structurally safe. Your project may require a building regulations inspection.
As the building owner you have a responsibility to ensure that any renovation work meets building control requirements. Your builder will be able to help you with this, but it is important that you know when approval is needed.
Building regulations differ between England, Wales, Scotland and Northern Ireland. More information can be found on your local authority building control’s website.