A doorbell lock is not one product. It is two decisions. A video doorbell shows you who is at the door. A smart lock controls whether they can open it. Most buying guides mix them up, list ten items and never mention the two things that decide whether any of it works for you in Britain.
Those two things are: will it physically fit a UK door, and will your insurer still pay out. On top of that there is a law most buyers have never heard of. Since 29 April 2024, every internet-connected product sold in the UK must publish how long it will receive security updates. That one line tells you more than any star rating.
Last updated: 18 October 2026. Legal requirements verified against legislation.gov.uk and gov.uk guidance on this date.
Read this before you buy anything
Most smart locks sold online are built for American doors, which use a single deadbolt. A typical British uPVC or composite front door uses a multipoint lock on a euro cylinder. A US deadbolt lock will not fit it. Check the format before you spend, and check what your home insurance policy requires.
What actually matters when buying
- Door format: UK multipoint and euro cylinder, not a US deadbolt
- Insurance standard: BS 3621 on timber; TS007 3-star cylinder on uPVC
- Independent testing: Sold Secure rating or Secured by Design accreditation
- Security updates: legally published since 29 April 2024 — go and read it
- Default password: banned by law; if a product still has one, walk away
- Privacy: film past your boundary and UK GDPR applies to you
- Power failure: insist on a key override or emergency power contact
What this article covers
Will It Fit a British Door?
This is where most money gets wasted, and almost no guide written for a UK audience says it plainly.
American smart locks are designed to replace a deadbolt: a single bolt turned by a thumb-turn on the inside. That is the standard American front door. A typical British uPVC or composite front door is completely different. It uses a multipoint lock — you lift the handle and several bolts engage up and down the frame — driven by a euro cylinder.
| Your door | What you need | What will not fit |
|---|---|---|
| uPVC or composite, lift-handle | A euro cylinder smart lock, or a motor unit that turns the existing cylinder | Any US deadbolt-format lock |
| Timber door with a mortice lock | A smart lock rated to BS 3621, or keep the mortice and add a smart nightlatch | Most deadbolt-format smart locks |
| Timber door with a nightlatch only | A smart nightlatch, plus a BS 3621 mortice for insurance | Nothing — but a nightlatch alone rarely satisfies a policy |
| Flat entrance door, communal building | Check the lease first; many forbid changes | Anything needing drilling into a fire door |
Door formats as used in UK housing stock. Always measure your existing cylinder before ordering.
The practical rule: if a product description says “deadbolt” and shows a round thumb-turn, it is almost certainly built for a North American door. If it says euro cylinder or “replaces your existing cylinder”, it is built for ours. If you are improving a property more broadly, see our guide to adding value to a property.
What Your Insurer Actually Requires
Home insurance policies specify locks, and the wording is not decoration. Fit something that falls short and a theft claim can be refused.
| Standard | What it covers | Where it applies |
|---|---|---|
| BS 3621 | Mortice deadlock, key-operated from both sides, tested against drilling and picking | Timber doors. The most commonly specified standard in UK policies |
| TS007 3-star | Euro cylinder tested against snapping, bumping, drilling and picking | uPVC and composite doors. Look for the three-star kitemark |
| Sold Secure (Bronze to Diamond) | Independent attack testing by the Master Locksmiths Association | Voluntary, but strong evidence of real security |
| Secured by Design | UK police-backed accreditation for products and homes | Some insurers offer a discount for accredited products |
Standards as published by Sold Secure and Secured by Design. Check your own policy wording, which overrides any general guidance.
Two things to do before you buy, and they take ten minutes between them. Read the “Security” or “Minimum security requirements” clause in your policy document. Then ring the insurer, describe the exact lock, and ask them to confirm in writing that it satisfies the policy. If they will not, buy a different lock.
Cylinder snapping is the specific risk. It is the most common forced entry method on uPVC doors in the UK, and it is why TS007 3-star exists. A smart lock that is clever about phones but weak about snapping has solved the wrong problem.
The Law Nobody Mentions
This is the part that is genuinely new, and it is in your favour as a buyer.
The Product Security and Telecommunications Infrastructure Act 2022, together with regulations made in 2023, came into force on 29 April 2024. It applies to every “connectable” consumer product sold in the UK — which is exactly what a video doorbell and a smart lock are. It applies at the point of sale, so it covers stock manufactured before the rules started.
| What the law requires | What it means for you |
|---|---|
| No universal default passwords | Passwords must be unique per device or set by you. If a product still ships with “admin/admin”, it should not legally be on sale. |
| A published way to report vulnerabilities | The manufacturer must publish contact details and act on reports. A company with no disclosure page is a company not watching for problems. |
| A published minimum security update period | This is the one to check. They must tell you how long the device will get security updates. A doorbell with eighteen months left is a doorbell with eighteen months left. |
| A statement of compliance with the product | Ask for it. Manufacturers and importers must keep one. |
Source: gov.uk guidance on consumer connectable product security and SI 2023/1007. Penalties for non-compliance reach £10 million or 4% of worldwide turnover.
So here is the single best question to ask before buying any smart doorbell or lock: “How long will this receive security updates?” The answer is legally required to be published. If a seller cannot point you to it in under a minute, that tells you something. More on the regime is set out in the government’s published product security framework.
The Ten Products, Assessed
The list below is the one this page has always carried, now with the thing that was missing: whether each one is actually relevant to a British front door.
| Product | Type | Fits a typical UK door? |
|---|---|---|
| Ultion Nuki Plus | Smart lock, euro cylinder | Yes — built for UK multipoint doors. The most relevant lock here |
| Yale Assure Lock SL (Z-Wave) | Smart deadbolt | Generally no — US deadbolt format. Yale’s UK range differs |
| Schlage Encode Smart WiFi Deadbolt | Smart deadbolt | No — US deadbolt format |
| August Smart Lock Pro | Retrofit over a deadbolt | No — needs a US thumb-turn deadbolt |
| Ring Video Doorbell Pro 2 | Video doorbell | Yes — doorbell only, no lock function |
| Google Nest Doorbell (Battery) | Video doorbell | Yes — battery, no wiring needed |
| Eufy Security Wi-Fi Video Doorbell | Video doorbell | Yes — local storage option |
| Arlo Video Doorbell | Video doorbell | Yes |
| Honeywell Home 3 Series | Wireless chime | Yes — but it is a doorbell chime, not security |
| GE Wireless Doorbell Kit | Wireless chime | Yes — chime only, no camera and no lock |
Assessment of door format compatibility based on the locking mechanism each product is designed to replace. Always check the current specification with the seller, as ranges change.
Notice what that table shows. Of the four smart locks on this list, only one is designed for the kind of door most British homes actually have. Four of the other entries are cameras, and two are just chimes. A “top 10 doorbell locks” list is rarely ten comparable things.
Video Doorbells and the Law
A video doorbell that only sees your own doorstep is your business. One that sees the pavement, your neighbour’s door or their garden is not just your business any more.
Government guidance on domestic CCTV is clear: if your camera captures images of people beyond your own property boundary, UK GDPR and the Data Protection Act 2018 apply to you. You become a data controller. That does not make you a lawbreaker, but it does give you duties.
- Put up a sign saying recording is taking place, including audio if it records sound.
- Point it at your own door. Use privacy masking or activity zones for anything past the boundary.
- Delete footage regularly. Keep it no longer than you actually need it.
- Respond to requests. Someone you have recorded can ask for a copy of their footage.
- Do not post clips on social media. This is where most disputes start.
- Audio is the risky part. Microphones reach much further than people expect, and recording a neighbour’s conversation is far harder to justify than recording your own doorstep.
Neighbour disputes over doorbell cameras have reached the county courts in England, and the usual trigger is a camera or microphone covering someone else’s property. Angling the camera down at your own step, and turning audio off if you do not need it, prevents almost all of this. Our guide to staying safe online covers the account security side.
When the Battery or Wi-Fi Fails
Every smart device fails eventually. The question is what happens when it does.
| Failure | What a good product does | What to check before buying |
|---|---|---|
| Battery flat | Warns for weeks, then accepts a physical key or emergency power | Is there a key override? If not, do not buy it |
| Wi-Fi down | Lock still works by key, keypad or Bluetooth | Does any core function depend on the internet? |
| Power cut | Battery-powered units carry on; wired ones need a backup | Battery or wired? Wired doorbells usually stop |
| Company stops supporting it | Lock keeps working mechanically | Check the published update period — it is a legal requirement |
| Phone lost or broken | Keypad code or physical key still opens it | Never rely on one method of entry |
Practical failure modes. The last row is where the PSTI support period becomes useful.
Always keep a conventional key, and leave a spare with someone you trust. A smart lock that can only be opened by a phone is one dead battery away from a locksmith’s bill.
Options for Renters
You almost certainly cannot change the lock without written permission, and changing it without permission can breach your tenancy agreement.
- Ask in writing and keep the reply. Many landlords agree if you offer to restore the original hardware when you leave.
- Battery doorbells that mount over the existing bell avoid wiring work entirely.
- No-drill mounts and adhesive brackets exist for most popular doorbells.
- Keep every original part. Put the old lock or bell back before you hand the keys over.
- Internal cameras need care too. In a shared house, a camera covering a communal hallway affects your housemates’ privacy, not just yours.
If you are letting a property out rather than renting one, security specification is worth getting right at the start — see our notes on short-term rentals and valuing a property.
Frequently Asked Questions
Do smart locks meet UK insurance requirements?
Not automatically. Many policies require a mortice deadlock to BS 3621 on a timber door, or a euro cylinder to TS007 3-star on a uPVC or composite door. Some smart locks meet these, many do not. Check the standard printed on the lock against the exact wording of your policy before you fit anything.
Can a smart lock invalidate my home insurance?
It can. If your policy requires a particular lock standard and you replace a conforming lock with one that does not meet it, an insurer may refuse a theft claim. Ring your insurer and ask them to confirm in writing before you change a lock.
Will a US smart lock fit a UK door?
Usually not. American smart locks such as Schlage and most August and Yale Assure models are built to replace a single deadbolt. British uPVC and composite doors use a multipoint lock driven by a euro cylinder, so you need a euro cylinder smart lock instead.
What is the PSTI Act and why does it matter for a doorbell?
Since 29 April 2024 every internet-connected consumer product sold in the UK must meet three legal security requirements: no universal default passwords, a published way to report vulnerabilities, and a published minimum period for which security updates will be provided. That last one tells you how long the device will stay safe to use.
How long will my video doorbell get security updates?
The manufacturer must publish this by law. Look for the support period on the product page or in the statement of compliance before you buy. If you cannot find it, that is a reason to buy something else.
Do I need to tell my neighbours about my video doorbell?
If the camera captures anything beyond your own property boundary, UK GDPR and the Data Protection Act 2018 apply to you and you become a data controller. Government guidance says to put up a sign, keep footage no longer than needed, and respond to requests from people you have recorded.
Is it illegal to point a video doorbell at a neighbour’s house?
It is not automatically illegal, but it does bring you under data protection law and can give rise to a nuisance or harassment claim. The safer course is to angle the camera at your own doorstep and use privacy masking for anything beyond it.
What happens to a smart lock if the battery dies?
A well-designed lock warns you for weeks first and keeps a physical key override or an emergency power contact. Never buy a lock that has neither. Keep a conventional key with someone you trust.
Can renters fit a smart doorbell or lock?
You need the landlord’s written permission to change a lock. Battery doorbells that fit over an existing bell, or no-drill mounts, are usually easier to agree. Keep the original hardware so you can put it back.
What is Sold Secure and Secured by Design?
Sold Secure is an independent attack-testing scheme that rates locks Bronze to Diamond. Secured by Design is the UK police-backed accreditation. Both are better evidence of real-world security than any marketing claim.
Conclusion
Buying one of these is simpler than the product lists suggest, once you ask the questions in the right order. Will it fit my door? Does it meet what my insurer requires? How long will it get security updates? Three questions, all answerable before you spend anything.
Get those right and the brand matters far less than the marketing implies. Get them wrong and you can end up with an expensive device that does not fit, does not satisfy your policy and stops receiving updates in a year. For more on improving a home, see our guides to buying a house and property investing for beginners. Background on the technology is on Wikipedia.
Sources
- Product Security and Telecommunications Infrastructure Act 2022 — legislation.gov.uk
- Security Requirements for Relevant Connectable Products Regulations 2023 (SI 2023/1007)
- gov.uk — regulations on consumer connectable product security
- gov.uk — the UK product security regime
- gov.uk — domestic CCTV: using CCTV systems on your property
- Sold Secure — lock testing and ratings
- Secured by Design — police-backed accreditation
- Wikipedia — smart lock
Disclaimer
Legal requirements were checked against legislation.gov.uk and gov.uk guidance on 18 October 2026. Door compatibility notes describe the locking mechanism each product is designed to replace; always confirm the current specification with the seller. Your own insurance policy wording overrides any general guidance here — confirm with your insurer in writing before changing a lock. This article is information, not legal, insurance or security advice. More from The UK Post.
