Shed, Summer House
& Garden Room
Electrics

For a fixed, safe and compliant supply, no. An extension lead trailed across the garden is a trip and shock hazard and isn’t weatherproof or RCD-protected at the right point. A proper buried SWA submain to a garden sub-board is the correct, certifiable solution and is notifiable under Part P.

Accepted best practice is at least 450mm deep in beds and lawns, and 600mm under driveways or anywhere subject to deep digging, with marker tape laid above the cable. The cable is steel-wire-armoured (SWA) — we don’t bury standard twin-and-earth, even in conduit. Where digging isn’t possible we run surface SWA in clipped conduit along walls and fences.

For anything beyond a single light, yes — a small garden consumer unit (sub-board) with its own main switch and RCBO protection. It means the building is independently protected and can be isolated, and it gives you room for sockets, lighting and heating circuits.

Yes. Once the submain and sub-board are in, we can add socket-outlets, electric heating, lighting and a network point for a garden office, or a dedicated weatherproof supply for a hot tub sited nearby. We size the submain at the survey so there’s capacity for what you plan to run.

It’s quoted to the cable run, the building’s load and the access, with VAT at 20% shown separately. As a rough guide a powered garden room/outbuilding submain starts from around £680; a simple shed light-and-socket job is less, a fully fitted summer house or office more. You get a fixed written quote after a free survey — no day rates.