Being locked out of your own home is a very unpleasant experience to find yourself in, and there are various causes that can leave you dealing with this type of situation. These are some of the common reasons why people find themselves locked out of their home and how a locksmith can help. 1. You Locked Your Keys Inside the House One of the most common reasons why people find themselves locked out of their home is because they simply lock the door without grabbing their keys.