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Additional storeys/Extending upwards

Building regulations: energy efficiency

There are a number of different considerations around the subject of energy efficiency, including whether or not an application for Building Regulations approval might be required for specific projects. More information about the range of energy efficiency measures possible can be found on the Energy Saving Trust's (EST) website1.


Internal lights

Fixed internal lighting will need to have reasonable provision made to obtain the benefits of efficient electric lighting whenever:

  • A dwelling is extended
  • An existing lighting system is being replaced as part of re-wiring works.

A way of making your internal lighting more energy efficient is to provide lighting fittings (including lamp, control gear and appropriate housing, reflector, shade or diffuser or other device for controlling the output light) that only take lamps having a luminous efficacy greater than 75 lumens per circuit watt.

The type of light fittings that would meet the above requirements, are fluorescent and compact fluorescent light fittings. Fittings for GLS tungsten lamps with bayonet cap or Edison screw bases, or tungsten halogen lamps would not.

A general way of meeting these requirements is to provide one fitting for every:

  • 25m2 of dwelling floor area (excluding garages); or
  • One per four fixed light fittings.

Lighting fittings in less used areas such as cupboards and other storage areas would not count towards a fitting. If constructing an extension, it may be more appropriate to install the energy efficient light fitting in a location that is not part of the building work. e.g. to replace the fitting in the hall or landing when creating a new room - depending on the likely extent of use of the new room light compared to the hall or landing.


Insulation

Installing insulation requires an application for approval under the Building Regulations, but this can be included as part of any application for the overall project. Care should be taken not to block any ventilation.


Radiators

Any new radiator installed will require a thermostatic radiator valve (TRV) to be installed. A TRV gives better control over the individual room temperatures. It is also encouraged to place TRV's on existing radiators.


Pipe lagging

This does not normally require Building Regulations approval.


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Useful links

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    1. https://energysavingtrust.org.uk/

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    The Planning Portal is delivered by PortalPlanQuest Limited which is a joint venture between TerraQuest Solutions Limited and the Department for Levelling Up, Housing and Communities (DLUHC). All content © 2024 Planning Portal.