What This Requirement Covers
Adding sockets, switches, or light fittings to an existing circuit is common electrical work in dwellings. Whether it requires Building Regulations notification depends on the location of the work.
Key Requirements
Non-Notifiable Work (No Building Control needed)
- Adding sockets, switches, or light fittings to an existing circuit in rooms that are NOT kitchens, bathrooms, or outdoors
- Replacing existing sockets, switches, or light fittings on a like-for-like basis (anywhere in the dwelling)
- Replacing a damaged length of cable in an existing circuit
Notifiable Work (Building Control or competent person scheme required)
- Adding sockets, switches, or light fittings to an existing circuit in a kitchen, bathroom, or outdoors
- Installing a new circuit anywhere in the dwelling
- Installing a new consumer unit
- Any electrical work associated with a kitchen or bathroom renovation
Good Practice for All Work
- Even non-notifiable work must comply with BS 7671
- Do not overload existing circuits; check the circuit can accommodate the additional load
- Use the correct cable size for the circuit type (2.5 mm² for ring finals, 1.5 mm² for lighting)
- Ensure connections are made in accessible junction boxes or accessory back boxes
- Test the circuit after completing the work to verify it is safe
Practical Compliance Tips
- If in doubt about whether work is notifiable, use a competent person scheme electrician; they self-certify all work
- Do not add more than one spur per socket on a ring final circuit; excessive spurs can overload the circuit
- Ensure all connections are properly made and mechanically secure; loose connections are a fire risk
- Issue a Minor Works Certificate for any electrical alterations (even non-notifiable work, as best practice)
- For kitchen and bathroom work, the electrical installation is typically part of a larger project; coordinate with the electrician early
- LED lighting draws much less current than traditional lighting; this makes it easier to add fittings without overloading circuits
- Keep all electrical certificates for future reference and property sales