Check that you have a standard lock cut-out
Most smart locks fit standard doors — no need to modify the leaf. That matters especially in apartments and offices, where cutting into the door can be a problem. See our electronic door locks range.
Measure the door thickness and handle spacing
Before you buy, measure three things:
- leaf thickness,
- mounting screw spacing,
- distance from the handle axis to the door edge.
This is the number-one reason for bad purchases — and it can be avoided in 2 minutes.
Confirm the door opening side (left or right)
Many locks come in L / R versions. Sometimes you can just switch it in the lock's settings, but it's better to check upfront than after delivery. A wrong-hand lock is a common reason for returns.
Check whether the lock requires drilling
Good news — most smart locks require no drilling:
- reversible installation,
- ideal for rentals,
- no permanent changes to the door.
Make sure the lock is suitable for exterior doors
Not every model is rain- and frost-resistant. If you're mounting it on an exterior front door exposed to the weather, look for information about the IP protection class.
Check how power and emergency mode work
Smart locks run on batteries (AA or AAA):
- the app warns you about low battery,
- many models have an emergency power port (e.g. a power bank over USB),
- some also have an emergency mechanical key.
That removes the fear of "being locked out forever".
See what the app setup looks like
Many models work through apps like TTLock, which let you:
- add users,
- issue time-limited and one-off codes,
- view entry and exit history.
The simpler the app, the better the post-install experience.
Check how long installation actually takes
Installing a smart lock usually takes 30–60 minutes:
- no specialist tools,
- comparable to swapping a handle,
- many models come with step-by-step instructions.
Pick a model that's friendly for a first installation
If this is your first smart lock, pick a model:
- with no hubs or extra modules,
- with several access methods (code, card, fingerprint, app),
- with clear instructions.
A good example is the H15B, which fits standard doors, doesn't require cutting into the leaf, works with card, code, app and fingerprint, and is suitable for exterior doors. Alternatives include the H61B or the flagship S35B — a comparison is in the smart lock ranking 2026. If you'd rather leave the install to specialists, book a professional installation or a free consultation.
