Part L Building Regulations

On the 6th April 2006 new versions of Part F (Ventilation) and part L (Conservation of fuel and power) of the Building Regulations came into force. The revisions in these new regulations include measures to reduce the energy consumption of new and refurbished buildings, while also ensuring adequate ventilation.

The new part L is a direct outcome of the Government’s Energy White Paper commitment to raise the energy performance of buildings by;

  • Limiting heat losses through the building fabric and from pipes and ducts.
  • Limiting excessive solar gains in buildings.
  • Ensuring that energy efficient, properly commissioned fixed building services with effective controls are installed.
  • Ensuring that the owner is provided with the information to operate  and maintain the building and its services.

Part L states that, for any works which affect the energy status of a building, Local Building Control must be notified. This means that the following situations are notifiable:

  • New and replacement heating systems
  • New and replacement Ventilation systems.
  • New and replacement air-conditioning systems
  • Extension of existing systems
  • Recommissioning of existing systems

We’re members of the Besca competent persons scheme. This means we can self-certify that our work complies with building regulations without the need to directly notify building control. As a result, our customers can relax in the knowledge that our installations are being installed to the latest building regulations.


It is rare to find a contractor committed to this level of service.

Andrew Shaw Group Engineering Manager(Mechanical) Lloyds plc