Many deadbolt-style smart locks are DIY-friendly if your door already has a standard cylindrical lock. Handle-set and mortise replacements are more involved.
Before you buy
- Measure door thickness and existing backset.
- Check handing (left/right) if the product is not reversible.
- Confirm you have room for the interior assembly — some are bulky.
Install day
- Remove the old lock carefully and keep screws organised.
- Fit the latch/deadbolt to the correct backset.
- Align the exterior and interior assemblies; do not overtighten.
- Test mechanical key operation before installing batteries and pairing the app.
- Enrol fingerprints and create a guest code only after the bolt throws cleanly.
When to call a locksmith
Call a professional if the door is warped, the strike plate does not line up, you have a multi-point locking system, or you are replacing a mortise lock. A clean install matters more than any app feature.
