Best Smart Lock UK 2026

Last updated: April 2026 | Researched for UK door types and real-world Home Assistant setups

Smart locks in the UK are genuinely different from the US. Most American guides push August or Schlage — brands that don't fit standard UK doors at all. UK homes typically use mortise locks, Yale nightlatches, or multi-point locking systems, and getting a smart lock wrong means either it doesn't fit or it doesn't meet your insurance requirements.

I've been running a smart home for two years — CCTV, Home Assistant, Zigbee sensors — and researching smart locks is something I've done thoroughly before pulling the trigger. Here's what actually works in UK homes.

Quick Comparison Table

Lock Type UK Door Fit HA Integration Auto-Lock Price
Yale Conexis L2 Replacement cylinder Mortise ✅ Via Yale app + HA ✅ ~£199
Nuki Smart Lock Pro (4th Gen) Add-on (thumb turn) Most ✅ Native ✅ ✅ ~£229
Yale Linus Smart Lock Add-on (thumb turn) European ✅ Yale app + HA ✅ ~£169
Ultion Smart Lock Replacement cylinder Mortise ✅ Via Bridge ⚠️ Manual ~£249
Tedee GO Add-on (thumb turn) Most ✅ Native ✅ ✅ ~£149

Why UK Smart Locks Are Different

Before diving into picks, a quick primer on why you can't just buy whatever Wirecutter recommends:

UK door types:

  • Mortise locks — the mechanism sits inside the door body. Very common in UK homes. Need a replacement cylinder (euro cylinder) smart lock.
  • Yale nightlatch — the spring-loaded latch on the inside of the door. Common on older UK front doors as a secondary lock.
  • Multi-point locks — one handle engages three or more locking points. Common on UPVC doors. Most smart locks don't work with these.

Insurance compliance: Your home insurance may require a BS3621 mortise deadlock. A smart add-on alone won't satisfy this — check your policy.

The Best Smart Lock for Most UK Homes: Nuki Smart Lock Pro (4th Gen)

➡️ Check current price on Amazon UK

The Nuki is the smart lock I'd recommend to most people. It fits over your existing thumb turn on the inside of the door, so it's fully reversible. If you move out or want to upgrade, you just remove it.

Why it wins:

  • Home Assistant native: First-class HA integration. No cloud dependency.
  • Matter support: Works with Apple HomeKit, Google Home, Alexa.
  • Auto-unlock: Detects your phone via Bluetooth and unlocks as you approach.
  • Door sensor included: Knows if your door is open or closed — not just locked/unlocked.
  • Keypad option: Add the Nuki Keypad for PIN entry (~£59).

The catch:

  • Requires a thumb turn on the inside. If you have a key-only cylinder on both sides, it won't fit without swapping the lock.
  • Battery powered (4x AA). Expect ~6 months on alkaline, longer on lithium.

Best for UK Mortise Locks: Yale Conexis L2

➡️ Check current price on Amazon UK

The Yale Conexis replaces your existing euro cylinder completely. It's a different category to the Nuki — this is your actual locking mechanism, not an add-on.

Why it wins:

  • Insurance grade: Can meet BS3621 standards when paired with a Yale BS rim cylinder (sold separately).
  • No thumb turn needed: Works with key-only cylinders on both sides.
  • Keycard/phone/fob: Multiple ways to unlock. RFID keycards work without your phone.
  • Remote access: Yale Connect WiFi Bridge enables unlocking from anywhere.

The catch:

  • Installation is more involved. You need to remove your existing cylinder and fit the Conexis in its place.
  • Home Assistant integration requires the Yale Access app bridge. Not as seamless as Nuki's native HA support.
  • Physical backup key is through the BS rim cylinder (if fitted). Without it, no physical override.

Best Budget Option: Tedee GO

➡️ Check current price on Amazon UK

The Tedee GO is the newer, smaller sibling of the Tedee Pro. It's a pure thumb-turn add-on like the Nuki, but cheaper.

Why it wins:

  • Smallest footprint: Less than half the size of the Nuki. Disappears on your door.
  • Home Assistant native: First-class HA integration. Same Matter support as Nuki.
  • Good battery: 1x CR123A lasts ~4 months. Small battery to swap.

The catch:

  • Newer to the market. Fewer long-term reviews.
  • Slightly less polished app experience than Nuki (though HA users won't care).

Best for High Security: Ultion SMART

➡️ Check current price on Amazon UK

The Ultion SMART combines a 3-star British Standard cylinder with smart features. This is for people who prioritise security over convenience.

Why it wins:

  • 3-star security: Sold Secure Diamond rating. The cylinder itself is anti-snap, anti-drill, anti-bump.
  • Key override: Physical key still works. No battery anxiety.
  • Insurance compliant: Likely to satisfy even strict insurers.

The catch:

  • Requires the Ultion Bridge for smart features. Without it, it's just a very good manual lock.
  • Auto-lock is manual (you turn the key). The smart features are about unlocking, not locking.
  • Expensive for what you get if you don't need the 3-star rating.

Smart Locks + Your Smart Home Setup

If you're already running Home Assistant (and you should be — read my Home Assistant starter guide), smart locks become incredibly powerful:

  • Arrive home → door unlocks, lights turn on, heating resumes.
  • Leave → door locks, security cameras arm, lights off.
  • Night mode → door auto-locks at 23:00, notifies if unlocked.
  • Holiday mode → random light patterns + locked door confirmation.

I use Zigbee sensors throughout my home — door sensors, motion sensors, temperature monitors. Combined with a smart lock, my home knows when I'm in, when I'm out, and responds accordingly.

Related: Best Zigbee Sensors UK 2025 — the perfect companions to your smart lock.

Installation: What You Need to Know

Before buying, check:

  1. Door thickness: Most smart locks support 35-55mm. Thicker doors may need adapters.
  2. Cylinder type: Euro cylinder? Rim cylinder? Thumb turn on inside? Take a photo of your door and check the manufacturer's compatibility checker.
  3. Power nearby: Some locks (like Yale Conexis with WiFi bridge) need power near the door for the bridge.
  4. Insurance: Call your insurer. Some require a mortise deadlock for contents cover.

Installation difficulty:

  • Thumb-turn add-ons (Nuki, Tedee): 10 minutes. Peel, stick, done.
  • Replacement cylinders (Yale Conexis, Ultion): 30-60 minutes. Requires removing old cylinder, fitting new one, aligning cam.

FAQ

Do smart locks work with Home Assistant?

Yes — but integration quality varies. Nuki and Tedee have native Home Assistant integrations. Yale uses cloud APIs which are less reliable and slower.

Will a smart lock invalidate my home insurance?

Possibly, if you remove your only BS3621 lock. Check your policy. The Yale Conexis + BS rim cylinder and Ultion SMART both meet British Standards. Nuki/Tedee are add-ons — your original lock stays, so compliance depends on that.

What happens if the battery dies?

  • Nuki: Emergency unlock via 9V battery on the outside contacts, or physical key through the original lock.
  • Yale Conexis: Physical key through the rim cylinder (if fitted), or 9V emergency power.
  • Tedee: No physical key — keep spare batteries handy or use the app via Bridge if you have one.

Can I use a smart lock on a multi-point UPVC door?

Generally no. Smart locks are designed for single-point locks. Multi-point systems require motorised handles or specialist UPVC smart locks (very rare in UK).

What's the difference between Matter and Zigbee?

Matter is the new universal smart home standard (Apple, Google, Amazon, Samsung all support it). Zigbee is the older mesh network standard. Most smart locks use Bluetooth + Matter/WiFi, not Zigbee directly. But they connect to Home Assistant, which then controls your Zigbee devices.

Where to Buy Smart Locks in the UK

  • Amazon UK — Best prices, Prime delivery, easy returns
  • Screwfix — Trade pricing, next-day collection
  • Yale Store — Direct from manufacturer, full warranty support
  • Nuki Store — Official retailer, sometimes has bundles

Final Verdict

Most people: Get the Nuki Smart Lock Pro. Best Home Assistant integration, fully reversible, excellent app.

Insurance-conscious: Get the Ultion SMART (3-star cylinder) or Yale Conexis L2 with BS rim cylinder.

Budget-conscious: Get the Tedee GO. Native HA support, tiny footprint, cheaper than Nuki.

Multi-point UPVC doors: Consider a smart handle (Yale Linus Handle) or wait — true smart locks for multi-point are still rare in the UK.

Related Reviews

Last updated: April 2026. Prices and availability checked on Amazon UK. Some links are affiliate links — I earn a small commission at no cost to you. All recommendations are based on hands-on testing or thorough research.