Most smart-lock comparisons are written by people selling smart locks, and it shows: long on app screenshots, silent on the question that decides everything for a British home, will it work with your door at all? The majority of UK front doors are uPVC or composite with multipoint locking, and the majority of smart locks you will see advertised were designed for a different kind of door entirely. As locksmiths, we fit smart locks, we like good ones — and we also attend the failures. This is the comparison we give customers at the kitchen table.
The famous deadbolt-style smart locks come from North America, where doors take a single round deadbolt. A British multipoint door has no deadbolt to replace, it has a strip of hooks driven by a euro cylinder, engaged by lifting the handle. For these doors, realistic smart options are: a smart euro cylinder (replacing the cylinder itself), a handle-mounted unit that turns the cylinder for you, or a full smart multipoint conversion. Each still depends on the door's mechanics: a smart motor cannot lift a stiff handle, and a dropped door that needs a shoulder will defeat a gadget that a service visit would have saved.
Timber doors are more permissive, smart nightlatches and retrofit units fit more readily, but the rule stands either way: the door must work flawlessly by hand before anything smart goes near it.
Where traditional wins. A mechanical lock cannot run flat, crash, or be phished. Its certifications are mature and insurer-recognised: Kitemarked BS3621 on timber, TS007 three-star or SS312 Diamond cylinders on multipoint doors. A burglar facing good mechanical hardware needs noise, time and risk, the three things they hate.
Where smart locks win. They remove the human errors that cause real burglaries: doors left unlocked (auto-locking closes them), keys under plant pots (revocable codes replace them), keys with cleaners and trades (time-limited access instead), and the lost-keys problem (revoke, not re-key).
Where smart locks lose, in practice. Our call-outs tell the story: flat batteries on units without a decent mechanical override; apps that update badly at midnight; motors straining against misaligned doors until something gives; and cheap imports whose underlying cylinder is the snappable kind our anti-snap guide warns about, a computer bolted to a weak lock is a weak lock with notifications.
Policy wording was written for keys: "key-operated locks", "five-lever mortice deadlock", "multi-point locking". A keyless installation can drift outside that wording without anyone noticing until claim time. Two protections: choose smart hardware whose mechanical core is itself certified (smart cylinders with TS007 ratings exist, and BSI now assesses smart locks under TS621), and tell your insurer in writing what is fitted. Boring, five minutes, decisive.
This is rarely an either/or. The setup that earns its keep in real homes is smart convenience layered over certified mechanical security: a rated anti-snap cylinder (or Kitemarked mortice lock) doing the resisting, with the smart layer handling access — and always, always a physical key override that lives outside the house. Smart features expire with batteries and firmware; a three-star cylinder is as strong in ten years as the day it was fitted.
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Answer those five honestly and either choice, smart, traditional or the hybrid, will serve you well — and when you want specific models, our smart locks and video doorbells buying guide names names. Skip them and no amount of technology, old or new, will compensate.
Real 2026 UK numbers from inside the trade: a full price table, hourly rates by time of day, VAT explained, and the call-out fee trap that catches people out.
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Honest 2026 numbers, lock by lock and for the whole house. What each door costs, the cylinder-only saving most people miss, and whether rekeying beats replacing.
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