Building regulations are minimum standards for design, construction and alterations to virtually every building. The regualtions are developed by the UK government and approved by Parliament.
The Building Regulations 2010 cover the construction and extension of buildings and these regualtions are supported by Approved Documents. Approved Documents set out detailed practical guidance on compliance with the regulations.
Building regulations approval is different from planning permission and you might need both for your project.
You can apply to any local authority building control department or Approved Inspector for building regulations approval.