How To Change A Door Lock

Changing a door lock may seem like a daunting task, but it can actually be quite simple. Whether you’re replacing a damaged lock or upgrading your security, learning how to change a door lock can give you peace of mind. In this article, we will guide you through the process of changing a door lock step by step.

Gather Your Tools

Before you start changing your door lock, you need to gather the necessary tools. You will need a screwdriver, a drill, a hole saw, a chisel, a hammer, and of course, the new lockset. Make sure you have everything before you begin.

Remove the Old Lock

The first step in changing a door lock is to remove the old one. You can do this by unscrewing the screws on the old lock with a screwdriver. Once the screws are removed, you should be able to pull the old lock out of the door.

Measure the Hole Size

Before you install the new lock, you need to measure the size of the hole in the door. This will help you choose the right size lockset for your door. You can use a tape measure or a ruler to measure the diameter of the hole.

Choose the Right Lockset

Once you know the size of the hole, you can choose the right lockset for your door. Make sure you choose a lockset that fits your door and your security needs. Some locksets have different features, such as keyless entry or deadbolts, so choose the one that suits you best.

Install the New Lock

Now it’s time to install the new lockset. Start by inserting the latch into the hole in the door. Then, insert the lockset into the hole, and screw it in place with the screws provided. Make sure the lockset is secure and flush against the door.

Install the Strike Plate

The next step is to install the strike plate. This is the metal plate that attaches to the door frame and holds the latch in place. Use a chisel and a hammer to create a mortise for the strike plate, then screw it into place.

Test the New Lock

Once the lockset and strike plate are installed, test the new lock to make sure it works properly. Test the latch and the deadbolt if you have one. Make sure the lock is secure and functions correctly.


Q: Do I need to hire a locksmith to change a door lock?

No, you can change a door lock yourself with the right tools and knowledge. However, if you are unsure about the process or have a complicated lock, it may be best to hire a professional.

Q: How long does it take to change a door lock?

It depends on the complexity of the lock and your experience with changing locks. Generally, it can take anywhere from 30 minutes to an hour to change a door lock.

Q: Can I use the same key for my new lock?

If your new lock is the same brand and model as your old lock, you may be able to use the same key. However, if you are upgrading to a different lockset, you will need a new key.


Changing a door lock may seem intimidating, but it’s a simple process if you have the right tools and knowledge. With this guide, you can change a door lock yourself and improve your home’s security. Remember to choose the right lockset for your needs and to test the lock before you finish the job.