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How to Install a Deadbolt Lock

In this video, we show you how to install a new deadbolt lock step-by-step with tips on how to mark the door and position the drill.

In this how-to video, This Old House general contractor Tom Silva shares his secrets for installing a keyed dead bolt.

For this installation, alignment is key. A deadbolt kit will usually come with a paper template to help you mark the door before you start drilling. In the video above, This Old House general contractor, Tom Silva is adds a deadbolt to a door that is an inch and 34 in thickness.

You’ll need to be comfortable using a drill to install a deadbolt yourself. To ensure proper placement use a speed square to check the drill is square in all directions as you use it, as shown in the video.

How Much Does It Cost to Install a Deadbolt?

Prices for deadbolt locks are typically between $25 to $300 depending on the the quality. Deadbolt installation typically costs between $75 to $400, depending on if you do it yourself or hire a professional to help you.

How to Install a Deadbolt in 15 Steps

  1. Position paper template on door edge; mark center holes on face and edge.
  2. Drill face hole using hole saw; drill from both sides to prevent splintering.
  3. Drill edge hole with spade bit.
  4. Insert deadbolt into edge hole and mark its outline.
  5. Chisel out mortise for deadbolt.
  6. Screw deadbolt to edge of door.
  7. Screw deadbolt mechanism to door, with keyed cylinder on the outside and turn lever on inside.
  8. Mark end of deadbolt with felt-tip pen.
  9. Close the door, throw bolt to leave mark on doorjamb.
  10. Use strike plate to mark deadbolt hole on doorjamb.
  11. Drill deadbolt hole in jamb with spade bit.
  12. Use utility knife to mark mortise outline for strike plate.
  13. Cut strike plate mortise with chisel.
  14. Set strike plate in jamb mortise and secure with long screws.
  15. Close door and test deadbolt.

What Tools Do I Need to Install a Deadbolt?