Smart Locks a Locksmith Recommends | The Ones Worth Fitting
Danny Whelan, Sunderland locksmith, names the smart locks worth fitting and the ones that cause expensive problems. Real brands, real failure modes.
A customer in Fulwell called me last spring. She'd bought a smart lock from a well-known tech brand, fitted it herself on a Saturday afternoon, and by Monday morning she was locked out because the app had lost connection and the backup keyway was so thin I'd have snapped a pick in it. Smart lock, dumb outcome.
I get asked about these fairly regularly now, usually by landlords managing properties across SR2 to SR5, or homeowners who've seen an advert and want to know whether it's worth the money. So here's my honest take: some are genuinely good, a few are excellent, and a surprising number are gadgets dressed up as security.
What I'm Actually Testing Them Against
Before I name names, here's the criteria I care about. Not how slick the app looks.
- Does it leave the multipoint locking mechanism intact and working?
- Does it carry a TS007 3-star cylinder rating, or at minimum work with one?
- Is there a physical backup key entry that isn't embarrassingly weak?
- Will your insurer accept it? Most home policies quote BS3621 or BS8621 as minimum standards for deadlocks. Anything that replaces your cylinder without meeting those standards could void a claim.
- What happens when the battery dies, the Wi-Fi drops, or the app server goes offline?
That last one matters more than people expect. I've attended callouts caused by all three.
Retrofit Smart Cylinders: The Sensible Route
For most homes in Sunderland, particularly the semi-detached and terraced stock you see across Roker, Silksworth and Pennywell, the door is a uPVC multipoint. You can't just bolt a full smart lock onto the front. The multipoint handle mechanism still needs to work, which rules out most American-style deadbolt replacements that dominate the market.
The retrofit cylinder is the answer for these doors. You swap only the euro cylinder, keep everything else, and gain smart access through the cylinder itself or a thumb-turn motor on the inside.
Ultion Smart is the one I'd fit at home. The mechanical cylinder behind it is a genuine Ultion, which is TS007 3-star rated and anti-snap as standard. The smart module clips on the inside. Physical keys still work. The app is stable. If the battery goes, you use the key. Simple. It'll cost around £180 to £220 supplied and fitted, which is fair for what you're getting.
Avocet ABS Smart is worth a mention too. The ABS cylinder has a strong track record for anti-snap performance and the smart version keeps that mechanical integrity. Slightly cheaper than Ultion at around £150 to £190 fitted. I've put a few of these into rental properties in Hendon and had no complaints.
Yale Conexis L1 is popular and the marketing budget behind it is enormous. I'm less enthusiastic. The cylinder it ships with is not independently 3-star rated, and I've seen the door handle tag fail to communicate after a firmware update. Yale will tell you there's a key card backup. That's true. But a key card is not the same as a proper keyed cylinder, and I wouldn't rely on it as my only backup.
Full Smart Lock Replacements: When They Make Sense
If you have a timber door with a traditional mortice deadlock, a full smart lock replacement is genuinely viable. A solid composite or timber door in a property in Ryhope, Seaham or out towards Boldon is often a better candidate than a uPVC multipoint.
Mul-T-Lock's smart range is what I'd reach for here. The mechanical pedigree is well established, the cylinders carry proper anti-pick and anti-drill ratings, and they sit comfortably within insurer requirements when specified correctly. Expensive, yes. Around £350 to £500 fitted depending on configuration. But it's a serious piece of kit.
Danalock V3 is a decent retrofit motor that sits over an existing euro cylinder, leaving your existing high-security cylinder in place. If you've already got an Ultion or Avocet ABS fitted, this is a cost-effective way to add smart access without touching the cylinder. Around £120 to £160 for the motor plus fitting. Works on Bluetooth and Z-Wave, no cloud dependency for basic operation, which I consider a plus.
The Ones I Won't Fit
I'll be direct. A number of brands sold through major retailers, and I won't name them all because the market changes fast, are essentially electronic deadbolts that replace the entire locking mechanism with something I wouldn't trust against a determined kick. No anti-snap. No insurance-grade certification. No proper physical backup.
If a smart lock doesn't specify TS007 3-star or SS312 Diamond standard compliance anywhere in its documentation, treat that as a red flag. These are consumer tech products that happen to have a lock function, not security products.
Side-by-Side: My Current Picks
| Product | Best For | Security Standard | Backup Entry | Approx. Fitted Cost |
|---|---|---|---|---|
| Ultion Smart | uPVC multipoint, any tenure | TS007 3-star | Physical key | £180 to £220 |
| Avocet ABS Smart | uPVC multipoint, rental properties | TS007 3-star | Physical key | £150 to £190 |
| Danalock V3 (with existing cylinder) | Adding smart to existing high-sec cylinder | Depends on existing cylinder | Physical key via existing cylinder | £120 to £160 |
| Mul-T-Lock Smart | Timber/composite mortice doors | High-security rated | Physical key | £350 to £500 |
| Yale Conexis L1 | Low-risk convenience use only | Not independently 3-star | Key card only | £150 to £200 |
A Note for Landlords
If you're managing rental properties across SR4, SR5 or further out towards Houghton-le-Spring or Washington, smart locks are genuinely useful for access management between tenancies. I'd still fit the Ultion Smart or Avocet ABS Smart as my default. Both let you hand a physical key to a tenant while you retain app-based access for maintenance visits, and neither compromises the multipoint. Check your buildings insurance policy wording before you fit anything. Some insurers specifically require the lock to appear on their approved products list, and a few mention Sold Secure or SS312 Diamond standards by name.
What Actually Decides It
Three questions cut through the noise.
First, what type of door do you have? uPVC multipoint needs a retrofit cylinder approach. Don't let anyone sell you a full surface-mounted lock for a uPVC door.
Second, what does your insurance policy require? Pull out the schedule and check the wording. If it says BS3621 deadlock as minimum, your smart lock needs to meet or exceed that, not replace it with something unrated.
Third, how paranoid are you about app dependency? If the idea of your lock needing a working internet connection makes you uncomfortable, stick to Bluetooth-based products like Danalock that operate locally. Cloud-dependent locks are fine until the company changes its pricing model, gets acquired, or just stops maintaining the server.
My recommendation for the majority of Sunderland homes: Ultion Smart, fitted properly, with the original handle and multipoint untouched. You get the convenience without gambling on the security. Everything else on that list above has a valid use case in the right situation, but if someone asks me what I'd put on my own front door, that's my answer.
If you're not sure what you've currently got, or you want someone to look at whether a smart lock will actually work with your door setup, give Locks Local a ring. We cover Sunderland and all the SR postcodes, we're usually with you in under 30 minutes for a callout, and we'll tell you honestly on the phone whether it's worth a visit or something you can sort yourself.
Lorraine Jessop, Security and standards specialist
Lorraine is the one who reads the test reports, and handles the survey work, the insurance questions and anything where the British Standard actually matters. Will happily explain why the number on the box is not the number that counts.
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