// COMMERCIAL & RESIDENTIAL · NICEIC-REGISTERED · FULLY INSURED
Group 3 Engineering provides reactive maintenance and emergency fault response for commercial and residential electrical systems, automated gates, barriers, access control, intruder alarms, CCTV and data networking. Based in Radlett and covering Hertfordshire, North London and Central London.
Eight services. One engineer. Read how we handle each one, or call it in and we'll find the fault, fix it and certify it — whatever the hour.
Tripping breakers, dead sockets, a smell that shouldn't be there — found at the cause, diagnosed, repaired, tested and properly certified.
Stuck open, jammed shut or refusing to move — diagnosed, made safe and repaired on the spot wherever possible, then safety-tested before we go.
Arm stuck up, stuck down, or not responding to control — diagnosed, made safe and repaired on the spot wherever possible, then safety-tested before we go.
Triggering at nothing, blind in one zone, a panel that won't settle — diagnosed, made safe, repaired and the system re-armed on the spot wherever possible.
Readers down, doors that won't lock — or won't release. Access restored as quickly as possible, with the building made secure before we leave.
No picture, no recording, or a camera that's stopped working — diagnosed, repaired on the spot wherever possible, and tested before we go.
Dead ports, WiFi dropouts or a network that's stopped behaving — diagnosed, repaired on the spot wherever possible, and tested before we go.
Planned visits, agreed response times and a single point of contact for multi-site or contract clients — reactive cover built around your business, not the other way round.
Mid-emergency right now? Skip the reading — call 0300 043 3973 and talk to an engineer.
Emergency response isn't a sideline for us. It's the whole business — one team, one number, every system covered.
Same-day attendance targeted, subject to location, engineer availability and the nature of the fault. Your expected response time will be confirmed when the call is booked.
One accountable service partner, with an appropriately qualified engineer assigned for each system.
NICEIC-registered, 18th Edition, fully insured. Every repair is tested and properly certified.
A fixed price before a single tool comes out — no hourly surprises, no padded invoice. What we quote is what you pay.
The same disciplined sequence whether it's a tripping circuit or an alarm panel in fault at 2 a.m.
An engineer answers, not a queue. We'll make things safe over the phone while we head your way.
We chase the cause, not the symptom — then give you one fixed price before a single tool comes out.
Diagnosed and made safe, with repairs completed on the first visit wherever possible. Dead- and live-tested, properly certified, and explained in plain English, not jargon.