Greenwich

Guide to building regulations

When you need building control approval

You will need approval to do the following:

  • build extensions and loft conversions
  • convert a garage into a habitable room
  • install fixed heating or cooling appliances and replacement windows
  • certain structural and other alterations
  • install cavity insulation
  • change the use of a property
  • underpinning
  • carry out drainage works

These examples, of when you need building control approval, are a general guide. If you are in any doubt, contact Building Control at the address shown.

Rules for electrical safety in the home

You have to notify the Royal Borough of Greenwich's Building Control team if you are considering carrying out electrical work in:

  • kitchens
  • bathrooms
  • outdoors
  • or adding new electrical circuits to any part of the house.

Minor jobs like replacing sockets and light switches in low risk areas such as bedrooms and living rooms will not be affected.

When approval is not needed

You do not need approval to do the following:

  • construct a low garden or boundary wall
  • construct a small detached building or garage if it is:
    • less than 30 square metres
    • single storey
    • one metre from the boundary or of non-combustible construction
    • not sleeping accommodation.
  • construct a carport open on two sides and less than 30 square metres
  • build a porch less than 30 square metres
  • construct a conservatory less than 30 square metres.

Further advice

These examples are a general guide. If you are in any doubt, contact Building Control or visit the Planning Portal to find out more.

Download Building Control forms and guidance