Apply for building regulations

Work that needs approval

These are the most common proposals that require building regulations approval.

If you're still unsure whether you need approval, please contact our Building Control Team.

  • The majority of house extensions.
  • New houses and apartments.
  • Conversions of buildings to houses or apartments.
  • Garage or outbuilding conversions to form a room.
  • Loft conversions.
  • Installation of roof lights or dormer windows.
  • Internal structural alterations, such as removal of a load-bearing wall or chimney breast.
  • Some electrical work to domestic properties.
  • Internal plastering and re-rendering works where more than 25 per cent of the wall area is affected.
  • A new opening or widening of an opening in a load-bearing wall.
  • Installing new baths, showers, sinks or toilets which involve new drainage or waste plumbing.
  • Altering the position of a staircase.
  • Window and door replacement (Unless installed by FENSA, CERTASS or BSI approved installer).
  • Construction of new chimneys, flues or the replacement of flue linings
  • Underpinning of existing foundations.
  • Re-roofing.
  • Installation of a septic tank (Existing septic tanks that discharge to a surface water source must be replaced with a package treatment plant or similar before January 2020. A Planning Application is also required for this work).
  • Cavity wall insulation.
  • Installation of new heating (other than electric and subject to certain exceptions).
  • The majority of work relating to non-domestic buildings, or conversions to non-domestic buildings.