New-Build Homes in London: Electrical Snagging Checks Before You Move In

Buying a new-build flat or house in London usually means a snagging list: small defects the developer should fix before or soon after you move in. Electrical snags are easy to miss because most of the wiring is hidden, but a few simple checks can catch common problems early, while the developer is still responsible for putting them right. This guide covers what to look for. It is general information, not legal advice.

Paperwork to ask for

• The Electrical Installation Certificate for the property.
• Building Regulations completion for the electrical work, usually handled by the developer.
• Manuals for the consumer unit, smoke and heat alarms, extractor fans and any heating controls.
• Details of any EV charger, solar panels or heat pump fitted, with their certificates.

Keep these with your house papers; you will need them when you sell. See our guide to the electrical certificates your solicitor will ask for.

Simple checks you can do yourself

• Every light switch works and controls the right light.
• Every socket works; a cheap plug-in socket tester can show basic wiring faults.
• Faceplates are straight, fixed firmly and not cracked or loose.
• Extractor fans in the kitchen and bathrooms run and clear steam.
• Smoke and heat alarms are fitted, linked together, and sound when tested.
• Outdoor lights and sockets work and their covers close properly.

The consumer unit

Open the cover of the consumer unit and check every circuit is clearly labelled. Press the test button on each RCD; it should trip and reset. A missing or unclear circuit chart is a common snag. See our guide on consumer unit labelling.

Plan changes before you decorate

New builds often have fewer sockets than you need, and few outdoor sockets. If you want extra sockets, data points or an EV charger, it is easier to add them before you decorate. Check whether your warranty or lease has rules about alterations. See our guide on adding sockets.

Report snags in writing

List every defect, with photos, and send it to the developer in writing within the period set out in your contract. Keep copies of everything. If you are unsure whether something is safe, an independent electrician can inspect it and give you a written report to support your snagging list.

Book an independent inspection

Energy North Ltd inspects new-build homes across North, East and West London with City & Guilds certified electricians. EICR from £100. See our EICR service.