How do you determine right or left lock handle location?

To determine the right or left lock handle location, stand facing the door from the outside. If the handle is on your right side, it is a right-hand door; if it's on your left, it is a left-hand door. Additionally, you can check the door's hinge placement: right-hand doors hinge on the right side when viewed from the outside, while left-hand doors hinge on the left side. This method is commonly used in both residential and commercial door installations.