How to Change a Door Lock
Changing a door lock improves your home security or updates worn hardware. This guide will help you replace a standard door lock quickly and correctly.
How to Change a Door Lock: Step-by-Step
Gather Your Tools and Materials
New door lock set (ensure it fits your door thickness)
Screwdriver (usually Phillips or flathead)
Tape measure (optional)
Pencil (optional)
Remove the Old Lock
Unscrew the interior and exterior handles or knobs.
Remove the screws holding the lock mechanism and faceplate.
Pull the lock cylinder and latch assembly out from the door.
Prepare for the New Lock
Check that the new lock fits the existing holes.
If necessary, mark and drill new holes using the template provided with the lock.
Install the New Lock
Insert the latch into the edge of the door and secure it with screws.
Attach the exterior knob or handle, then the interior one, aligning the spindle through the latch.
Screw all parts tightly but avoid overtightening.
Test the Lock
Turn the knob and lock to ensure smooth operation.
Close the door and check that the latch fits properly into the strike plate on the door frame.
Tips for Changing a Door Lock
Helpful Tips
Choose a lock that matches your door’s thickness and backset.
Keep all screws organized to avoid losing them during installation.
Lubricate the latch with graphite or silicone spray if it feels stiff.
Always follow the manufacturer’s instructions included with your lock.
Consider upgrading to a deadbolt for added security.