Most smart locks are built for a standard deadbolt opening, so installation is usually a careful screwdriver job rather than a door-drilling project. The important part is alignment: the deadbolt must move freely before the electronics are added.
These steps apply to common deadbolt-replacement smart locks from August, Schlage, Yale, Kwikset, and similar brands on a standard U.S. door.
Does this affect you?
Use this guide if your door already has a deadbolt and you want to replace it with a keypad, Bluetooth, Wi-Fi, Z-Wave, Zigbee, or app-controlled smart lock. Most installs take about 20 to 30 minutes when the existing door hardware is standard.
Remove the old deadbolt and install the smart lock
The exact screws and plates vary by brand, but the basic order is the same on most doors.
- Open the door and leave it open while you work.
- Remove the two screws on the inside thumb-turn part of the old deadbolt.
- Pull the interior and exterior lock pieces away from the door.
- Measure the backset, which is the distance from the door edge to the center of the lock hole. Most doors are either 2 3/8 inches or 2 3/4 inches.
- Adjust the new latch to match that backset if your smart lock includes an adjustable latch.
- If the existing latch is compatible, you may be able to reuse it. If not, remove the two edge screws and install the latch supplied with the smart lock.
- Feed the cable or spindle through the latch as directed by the lock manual.
- Install the interior mounting plate and tighten the long screws evenly.
- Attach the exterior keypad or outside lock body, then connect it to the interior assembly.
- Before inserting batteries, turn the deadbolt by hand several times and confirm it extends and retracts smoothly.
Do not force the motor to overcome a stiff bolt. Smart lock motors are small, and a binding door will quickly cause failed locking, battery drain, and calibration errors.
Fix common fit issues
If the lock does not sit flush or the bolt scrapes, pause and correct the mechanical fit before finishing app setup.
- If the bolt feels tight, loosen the strike plate screws slightly, move the bolt in and out a few times, then retighten once it lines up cleanly.
- If the backset does not match, check the lock maker’s compatibility page or adapter options instead of forcing the latch into position.
- If the lock halves will not sit flat, confirm the latch face is fully seated in the recessed mortise on the door edge.
- If the door is unusually thick or thin, check the supported thickness range in the manual. Many locks cover roughly 1 3/8 to 2 inches, with extension kits available for some models.
Many smart locks need a separate bridge, Wi-Fi adapter, gateway, Echo, Ring hub, SmartThings hub, or Apple home hub for remote control away from home. Bluetooth-only locks may work from your phone nearby but not from across town unless that extra bridge is present.
After installation, open the lock app and create separate codes for each person instead of sharing one master code. Use temporary or scheduled codes for guests, cleaners, dog walkers, or contractors so they can be removed without changing everyone’s access.
If the lock includes a physical keyway, test it during setup. It is much better to discover a bad backup key while the door is open than during a real lockout.
Sources
- Schlage Support – Installing your Schlage smart lock (2025)
- Yale Home Support – Assure Lock installation guide (2025)
- August Support – Installing your August Smart Lock (2025)