Third party certification schemes for domestic electrical work

Find out how you can join a third party certification scheme for domestic electrical work.

Applies to England


All electrical work in dwelling must be carried out in line with Part P of the Building Regulations. From 6 April 2014 a person who is registered with a third party certification scheme for electrical installations in dwellings will be able to check domestic electrical work that is undertaken by others and certify that it is compliant with the building regulations.

Another way of demonstrating that electrical work is compliant with Part P is either:

Current schemes

Contact the relevant body below for details about joining. The bodies that have been authorised to operate third party certification schemes are listed alphabetically in the table below. Please note that if you are already registered with one of them for self-certification of your own work, you will need to apply for separate registration in order to offer third party certification of other people’s work.

Scheme full name Short name Website Contact number
NAPIT Registration Limited NAPIT 0845 543 0330
Stroma Certification Limited Stroma 0845 621 1111

Minimum technical competence (MTC) requirements for third party certification schemes

In order to be registered with a third party certification scheme, electricians will need to demonstrate that they meet the relevant minimum technical competence requirements (see below).

Minimum technical competence for third party certification schemes for electrical installations in dwellings

This file may not be suitable for users of assistive technology.

Request an accessible format.
If you use assistive technology (such as a screen reader) and need a version of this document in a more accessible format, please email Please tell us what format you need. It will help us if you say what assistive technology you use.

How schemes are authorised

The Department for Communities and Local Government (DCLG) is in charge of authorising third party certification schemes. To make sure that the standards are consistent, there are conditions that scheme operators must meet (see below).

Published 21 March 2014
Last updated 14 May 2014 + show all updates
  1. Removed BSI Assurance UK Limited (BSI) as a certified scheme.

  2. First published.