Installing a bedroom door lock from the outside can provide you with an additional layer of security and privacy. It can also help you control access to specific areas of your home. While it may seem like a challenging task, it can be done with a few tools and some basic knowledge. In this article, we will provide you with a step-by-step guide on how to install a bedroom door lock from the outside.

Tools and Materials Needed:

  • Lockset (deadbolt or knob lock)
  • Screws
  • Screwdriver
  • Tape measure
  • Pencil
  • Drill
  • Hole saw (if installing a deadbolt)
  • Chisel
  • Strike plate

Step 1: Choose Your Lock

Before you begin the installation process, you need to choose the type of lock you want to install. There are two common types of locks: deadbolts and knob locks. Deadbolts are more secure than knob locks because they have a thicker bolt that extends further into the door frame. However, knob locks are easier to install and do not require as much preparation as deadbolts.

Step 2: Measure and Mark

Measure the height of the existing doorknob on the inside of the door and transfer the measurement to the outside of the door using a tape measure and pencil. This will help you ensure that the lock is at the same height on both sides of the door. Next, mark the center of the door for the lock installation.

Step 3: Drill the Hole

Use a drill and hole saw attachment to cut a hole through the door at the center mark. This hole should be large enough to accommodate the lock cylinder.

Step 4: Install the Lock Cylinder

Insert the lock cylinder into the hole you just drilled and make sure it is level. Secure it in place with screws, following the manufacturer’s instructions.

Step 5: Install the Latch

Place the latch on the door edge and mark the position of the latch plate on the door jamb. Chisel out the marked area on the jamb so that the latch plate sits flush with the jamb. Install the latch plate with screws.

Step 6: Install the Deadbolt or Knob Lock

If you are installing a deadbolt, you will need to drill a second hole in the door above the lock cylinder hole to accommodate the bolt. The deadbolt assembly can then be installed, following the manufacturer’s instructions.

If you are installing a knob lock, you will need to remove the existing doorknob and replace it with the knob lock. Follow the manufacturer’s instructions for installation.

Step 7: Install the Strike Plate

The strike plate is the metal plate that goes on the door jamb and receives the latch or bolt. Install the strike plate on the door jamb in the marked position, following the manufacturer’s instructions.

Step 8: Test the Lock

Once the lock is installed, test it to ensure it is functioning correctly. Try locking and unlocking the door from both sides to ensure that the lock is working properly.

Tips for Installing a Bedroom Door Lock from Outside:

  • Always follow the manufacturer’s instructions when installing a lock.
  • Use the right tools for the job, including a drill and drill bits, a chisel, and a screwdriver.
  • Take your time and measure carefully to ensure a proper fit.
  • Be sure to use a lock that is appropriate for the level of security you require.
  • Test the lock thoroughly before considering the installation complete.


Installing a bedroom door lock from outside can provide you with an additional layer of security and privacy. While it may seem daunting at first, with the right tools and some basic knowledge, it can be done with relative ease. Remember to choose the right type of lock, measure carefully, and follow the manufacturer’s instructions to ensure a proper.

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