Use the correct key
Turn the key in the lock
Turn the handle or knob
Push or pull the door
Check for a latch or deadbolt
Retract the deadbolt if present
Make sure the door is not stuck
Contact a locksmith if you cannot open it
Use the correct key
Turn the key in the lock
Turn the handle or knob
Push or pull the door
Check for a latch or deadbolt
Retract the deadbolt if present
Make sure the door is not stuck
Contact a locksmith if you cannot open it