Video doorbells: wired, wireless and what’s legal

Battery or wired: the real difference

Battery models stick or screw to the door frame, need charging every month or three, and talk to a plug-in chime indoors. Wired models replace an existing doorbell and draw power from its transformer: no charging, a slimmer unit and, on many models, continuous recording rather than motion clips.

The catch with wired: the transformer that ran your old ding-dong chime may be too feeble for a camera. Most models want a supply somewhere in the region of 8–24 volts AC; the spec sheet states the exact range, and the transformer’s label states what it gives. If they disagree, the transformer needs upgrading, an electrician’s job because its other side is mains.

The renter-friendly routes

No-drill mounts (adhesive plates and wedge brackets that fit around the door frame) hold battery doorbells perfectly well, and a plug-in chime needs nothing but a socket. Landlord permission is polite for anything stuck on, and required for anything screwed or wired. The locks and security guide covers the rest of the front-door kit.

Swapping onto existing chime wiring

If your home already has a wired chime, a like-for-like swap onto the low-voltage bell wires is a job careful homeowners do take on, with two rules: the power goes off first, and the moment anything looks like mains cable rather than thin bell wire, you stop and call an electrician.

Anything beyond that (a new transformer, a doorbell circuit where none exists, cable hidden in the wall) is small, quick work for an electrician at ordinary rates. If the circuit misbehaves after a swap, run the tripped breaker routine before assuming the worst; the home electrics guide marks where the DIY line sits for jobs like this.

The legal bit: your camera and other people

UK data protection law does not apply to a camera that only records within your own property. The moment it captures beyond the boundary (the pavement, the road, a neighbour’s path) the ICO’s household CCTV guidance applies: still legal, but with responsibilities.

They are manageable: let people know recording happens (a small sign does it), angle the camera and use privacy zones to minimise what you capture of other people’s space, keep footage only as long as you need it, and be ready to share or delete recordings of a person who asks. Audio is the sensitive end (doorbells hear conversation metres away), so switch it off unless you need it. A camera that behaves pairs well with an alarm that behaves.