Smart locks and cameras: what's worth the money and what's marketing

Smart security is sold as one product — the secure, monitored, app-wrapped home. It's actually three purchases wearing one box: locks, cameras, and monitoring. Two of them earn their keep in ordinary households. The third is mostly a recurring-revenue business. Here's the honest sorting, with the catch that almost nobody mentions until their insurer does.

Smart locks: the genuinely useful one

What a good smart lock actually delivers: no keys to lose, copy or hide under the mat (the mat-spare-key habit is on every police list); codes for people you trust — cleaners, dog walkers, visiting relatives — created and revoked in seconds; auto-lock for the household member who has never once locked the door; and the remote check, from a taxi, that the door is locked at all. That's a real quality-of-life upgrade, and the safety logic is defensible: fewer spare keys in the world is fewer ways in. The honest limitations: it's another powered device (batteries die — put the change on a schedule), another app that needs updates and eventually support (the twelve-year software question applies), and — the catch — insurers specify standards, and in the UK that usually means BS 3621: a keyed lock. Replacing the mortice deadlock with a smart lock can technically leave your policy's security condition unmet; the workable pattern most households land on is smart on the night latch, standard five-lever deadlock staying in the door. Check your policy wording before, not after.

Cameras and doorbells: useful, bounded

The video doorbell is the honest success story of the category: it answers the door from anywhere, keeps the parcel footage that resolves disputes, and — police guidance is broadly positive here — adds deterrence and evidence at the entry point, which is where opportunistic crime happens. Fixed cameras covering your own boundaries add the same for the driveway and garden. The limits: footage is for evidence and awareness, not prevention of the determined; battery models need charging like everything else; and privacy law has teeth — in the UK, cameras covering pavement, road or a neighbour's property pull you into data-protection obligations, and footage of shared space can be contested. Aim your camera at your own property; the law and your neighbours both simplify.

The monitoring subscription: the actual product being sold

The kit is the advertisement; the subscription is the business. Professional monitoring (a service that calls you and, at the top tier, the police when an alarm triggers) has a real use case — households frequently away, vulnerable residents, insurance discounts that offset the fee. For most households, self-monitoring — the app notifying you, you deciding what's real — does the meaningful work at zero monthly cost. The pattern to recognise: kit priced cheap against a contract that carries the margin, features paywalled behind tiers, and hardware that degrades when the subscription lapses (the same compounding logic, in a billing costume). Price the total over five years, not the doorbell.

The verdict, in the shape this desk uses

Worth it: keyless entry with codes, the video doorbell, one or two well-aimed cameras, self-monitoring, and — the cheapest security on this page — the locked-doors-and-sightlines habits police publish for free. Be sceptical of: multi-year monitoring contracts, feature-gated basics, any lock that removes the insurer's specified standard, and the general implication that gadgets substitute for habits. The house that's hard to enter is hard to enter because of what its people do nightly; the gadgets document and remind — they don't replace.

Sources: UK police door/window prevention guidance; insurer lock-standard conventions (BS 3621); UK data-protection guidance on domestic cameras (ICO household CCTV guidance). Reviewed September 2026 · general information — your insurer's wording and your jurisdiction's camera rules are the authorities.