Renting comes with a frustrating limitation: you cannot make permanent changes to a property you do not own. Drilling, rewiring and swapping locks are all off the table without a conversation with your landlord, and often the answer is no. That leaves a lot of renters assuming smart home security is not for them. It is, and more of it than you would think requires no permission at all.

The trick is to build a security stack out of things that stick on, plug in and peel off cleanly, so nothing threatens your deposit and everything comes with you when you move. This guide walks through the whole stack, with realistic UK prices, and focuses on the one question most renters actually care about: is my front door locked?

The Renter's Security Challenge

As a renter you face a specific set of constraints. No permanent modifications. A deposit that has to come back intact. A home that is, by nature, temporary, so anything you invest in needs to move with you. The good news is that the market has caught up. There is now a whole category of security kit designed around exactly these rules, and none of it involves a screwdriver near the door frame.

What You Can Do Without Landlord Permission

The Lock Question, and Why It Is Different for Renters

Here is where renting bites hardest. You cannot install a smart lock without landlord permission, because it means removing and replacing the cylinder the landlord owns. Most tenancy agreements forbid altering the locks, and even landlords who are open to it often say no to a motorised device drilled into their door.

But you do not need to replace the lock to solve the actual problem. The problem is not that your lock is bad. It is that you cannot tell, once you have left, whether you turned it. A lock monitor answers that without touching the mechanism. It sits over your existing thumb-turn or cylinder, reads whether it is locked or unlocked, and shows the state on your phone from anywhere. Your key still works exactly as before, and the landlord's lock is untouched.

Never forget to lock your doors again.

Locksure fits over the lock you already have and shows its locked or unlocked state on your phone, from anywhere. No drilling, no lock replacement.

See how it works →

Will Your Landlord Mind? Almost Certainly Not

Because a monitor changes nothing about the lock and leaves no permanent mark, there is genuinely nothing for a landlord to object to. That held up when we asked them directly.

During the Locksure beta we put the question to 40 UK landlords, describing a device that fits over the existing lock with adhesive, adds no drilling, changes nothing about how the door is opened and peels off cleanly. 38 said yes without hesitation. The two who hesitated simply wanted to be told first, which is a reasonable courtesy for anything you add to a rented home. If you want to be thorough, a one-line message saying you are adding a stick-on sensor that does not alter the lock is usually all it takes, and it puts the approval in writing.

Deposit Safety and Removability

Everything in a renter's stack should pass one test: does it come off without a trace? Deposit disputes in the UK frequently come down to marks, holes and "alterations", so the whole approach here is to add capability without adding damage.

• Adhesive, not screws. A lock monitor mounts with adhesive pads. When you move, it lifts off and any residue wipes away, leaving the landlord's lock exactly as it was.
• Nothing structural. No drilling into door, frame or wall, so there is nothing to make good and nothing to declare on the inventory.
• It moves with you. Because it is your device and not a fixture, you unstick it, pack it and re-fit it at the next place in minutes. You are buying security you keep, not an improvement you gift to the landlord.

Building a Renter's Security Stack

You can assemble a genuinely capable, fully portable setup for well under £200. Everything here sticks on or plugs in, and all of it leaves with you.

1. Lock monitor (from £44.99) - know whether your front door is locked, from anywhere. The foundation of the stack.
2. Door open/close detection (optional £9.99 Open/Close Magnet) - adds "is the door open or shut?" to the same monitor, useful for a flat door you want to know stays closed.
3. Portable door and window sensors (£15-£40) - stick-on alarms that chirp if something is opened while you are out.
4. Smart plugs and a lamp (£15-£30) - lights on a schedule so the place looks lived-in when you are away.
5. Door wedge or portable jammer (£10-£25) - a bit of physical reassurance at night, especially in a shared house.

Total investment: comfortably under £200, all portable, all landlord-friendly, all moving with you to the next tenancy.

Matter or Standalone? Pick the Route That Fits Your Flat

Lock monitors come in two flavours, and which one suits you depends on what is already in your home.

• No smart-home hub? Choose the standalone Thumb Turn. The Original Locksure Thumb Turn works on its own over Wi-Fi using the small Display Hub included in the box. There is no Thread router to buy, no ecosystem to join and no subscription. This is the simplest pick for most renters, because it works in any flat with Wi-Fi.
• Already have a HomePod, Nest Hub or Echo? Choose the Matter version. If your place has an Apple HomePod mini, Apple TV 4K, Google Nest Hub or a recent Amazon Echo, it can act as the Thread border router the Matter Lock Sensor needs, and the door then shows up right inside Apple Home or Google Home alongside everything else. No extra hub required.

Either way you are monitoring, not replacing. The lock stays the landlord's, the device stays yours, and the front-door question finally has an answer you can check from the bus.

Frequently Asked Questions

Can I use a smart lock in a rented flat?

Usually not without landlord permission, because a smart lock replaces the cylinder your landlord owns and most tenancies forbid altering the locks. A lock monitor sidesteps this: it reads your existing lock without replacing it, so there is nothing to ask permission for and nothing to reinstate when you leave.

Do I need my landlord's permission for a lock monitor?

Strictly, no, because it changes nothing about the lock and leaves no mark. In our beta, 38 of 40 landlords were happy with it. A quick message letting them know is a sensible courtesy and gives you the approval in writing.

Will it damage the door or risk my deposit?

No. It mounts with adhesive pads over the lock, with no drilling into the door or frame. It lifts off cleanly when you move and any residue wipes away, so there is nothing for a check-out inventory to flag.

Can I take it to my next place?

Yes. It is your device, not a fixture. Unstick it, pack it and re-fit it at the next flat in a few minutes. You are buying portable security, not an improvement you leave behind.

What if I do not have a HomePod or Nest?

Then choose the standalone Thumb Turn, which works on its own over Wi-Fi using the small Display Hub included in the box. You do not need any existing smart-home kit for it to work.