On average, you can expect to pay $30 to $80 for a door lock installation kit. The cost is also dependent on whether or not you hire a professional for the installation. If you opt to hire a professional, you can expect to pay anywhere from $150 to over $500 for the job. Plus, if you don't have an existing hole in your door, you may need to purchase a hole saw, which can cost up to $40 per piece.