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How to Put a Door Lock on a Door

This article is a collaborative effort, crafted and edited by a team of dedicated professionals.

Contributors: Muhammad Baballe Ahmad, Mehmet Cavas, Sudhir Chitnis, and Zhen-ya Liu.

✓ Verified & Tested Information

Want to up the security of your home? Learn how to put a door lock on a door with this step-by-step guide.


Before you begin to put a door lock on a door, it’s important to make sure that you have all the necessary supplies. This includes the door lock, a Phillips head screwdriver , a drill, and any other necessary items such as mounting plates. Once you have these items, ensure that the door has a suitable surface to mount the lock. Additionally, make sure that you have a drill bit that is the correct size for the screws. With all these supplies in hand, you’re now ready to put a door lock on a door.

Choose the type of lock you want

When selecting the type of lock you will use for your door, there are various factors to consider including how secure the mechanism is, how it looks, how much it costs, and how easy it is to install. Generally speaking, there are three main types of locks used in residential settings: knobs, deadbolts and handlesets.

Knobs come in a variety of styles, shapes and colors. Knobs are smaller and easier to install than most other types of locks, but they provide less security due to their smaller size. Deadbolts are more secure than knobs and can be either single or double-sided. Handlesets consist of two parts – a knob or lever on the inside along with an exterior trim piece that compliments your home’s decor. Handlesets have the added benefit of being more aesthetically pleasing as well as providing more security through features such as tamper-resistant screws on the interior side knob or lever which make them harder for intruders to breach.

Measure the door and jamb

The first step when installing a door lock is to measure the thickness of the door as well as the width of the jamb. Generally, this measurement will be done using a carpenter’s ruler or calipers. If you are unsure of these measurements, it is best to err on the side of caution by taking bigger measurements rather than smaller ones. Once you have your measurements, check that they are correct by verifying them against a manufacturer’s template; this will ensure that the lock will fit properly when installed. In some cases, you may need to sand or otherwise alter the wood around the door or jamb area in order for it to properly accommodate your chosen door lock. Be sure to wear eye protection whenever working with power tools and follow all safety precautions outlined in any accompanying documentation.

Purchase the necessary supplies

Before you begin the task of installing a door lock, you will need to make sure that you have all the necessary supplies. Purchase a new door lock that fits the measurements and standards of your specific door. You’ll also need to make sure that you have screws and drill bits appropriate for your type of lock. Additionally, many times a door jamb may require reinforcement for the installation of a door lock. If this is the case for your project, you will need to purchase wood or other reinforcements as well. It’s also important that you have access to reliable tools like an electric drill, screwdriver and screwdriver bit set before beginning this project.


Installing a door lock is a relatively easy project that can be done in a short amount of time. However, it is important to make sure that the door lock is properly installed for security reasons. In this article, we will discuss the steps you need to take in order to properly install a door lock on a door.

Remove the old lock

Before you begin the installation of your new door lock, you will need to remove the old lock. Depending on how old your existing door is, the type of lock you have and how it has been attached to the door frame, there can be a wide variety of ways in which it will need to be removed.

The first step is to identify the type of lock that you have installed on your door so that you know what tools and techniques are required for removal. Common types of locks include knob sets, deadbolts, latch-sets and mortise locks.

If it appears that screws are visible as they protrude from either side of the doorknob body or escutcheon plate, then this means that your classic knob set is almost certainly held into place with wood screws. If this is the case then simply unscrew these until they detach from both sides of the knobs.

For deadbolt locks, if screws are visible on the escutcheon plate then those should also be unscrewed first; however there may also be another plate located at the back edge of where handle meets latch inside along with a small hole used for retracting the bolt back into place; in this case an allen key is likely what will be needed for removal.

On latch-sets and mortise locks without visible screws/plates, specialized tools such as flat chisels or screwdrivers will likely be necessary for removal as these types can often require prising away from wooden surfaces using extra force such as tapping with a hammer or mallet before anything will budge.

Install the new lock

Once you have chosen a lock, the next step is to install it. This requires a few basic tools and some patience. To install your new lock, begin by putting the striker plate on the door jamb. The striker plate should be placed at shoulder height and secured with screws or nails. Once the striker plate is secure, place the exterior door latch into the cut out of the faceplate on the exterior side of your door. Align the latch with its counterpart on your jamb for proper fitment. Secure it in place using screws or nails provided with your kit.

Next, move to inside of your door and secure in place 2 sets of screws that will hold in place the interior half of your lock’s latch mechanism. For added security, use wood glue to keep these screws from becoming loose over time. Finally, assemble all remaining components (a latch-backing plate and mounting hardware) as specified by manufacturer instructions included with your kit and attach them to both sides of your door; once fully installed, test each side of your lock’s mechanical operation prior to engaging it fully and locking your doors!

Install the strike plate

Once the door lock is in place it’s time to mount the strike plate. The strike plate is what engages the bolt of the door lock, so its placement is critical. It should be placed directly on the doorjamb and aligned with the hole for the bolt. Once you know where to place it, mark a spot for screws that are 1″ long (or longer). Then, use a drill to make pilot holes at these marks and then insert screws and tighten. If necessary, use a file or saw to slightly enlarge the strike plate’s mortise so that it will seat against the jamb securely when closed.

Finishing Up

Installing a door lock is an easy and straightforward job, but it’s important to do it correctly so you know your door is secure. The final step in the process is to put the finishing touches on it. This includes testing out the lock and making sure it works properly, putting on the exterior plate and the interior faceplate, and attaching the strike plate to the door jamb. Let’s go through each of these steps in detail so you’ll know how to properly finish up the process of installing a door lock.

Test the new lock

Testing the new lock is an important step in making sure it will work properly and provide the security you need for your home. Before beginning, make sure that you have all the necessary tools, such as a flathead screwdriver, a Phillips head screwdriver, and a power drill.

Start by positioning the lock on the door at the required height and make sure it is lined up with the strike plate on the other side of the door. You can then mark where to drill holes with a pencil or marker. To protect against any damage to your doorframe, place a few blocks of wood behind your marks before drilling out those holes using either a wood bit or metal bit depending on material of frame.

To secure the frame in place use screws provided with your lock kit and gently tighten until snug but not too tight as this may also cause warping in frames if done excessively. Lastly insert your key into keyhole to ensure that mechanism works well from both sides of door. If everything works correctly then you’ve successfully installed your new lock!

Secure the screws

Once you have the hardware securely in place, it’s time to attach the screws and secure the door lock. There should be two screws provided with your door lock. These will be used to fasten the cylinder plate of your door lock to your door. Carefully position the screws on either side of the cylinder plate and use a Phillips head screwdriver or bit to tighten or loosen them as necessary until they are flush with the plate’s surface. You should take care not to over-tighten them, as this could cause damage to your components or even strip out the screws altogether. Once properly secured, you have successfully installed your new door lock!

Adjust the latch and strike plate

Once the hole has been cut and the installation brackets have been secured, you can put the latch and strike plate on the door. Make sure they correspond correctly with each other by marking the latch with a pen or chalk so you know which way it needs to match up with the strike plate. Place them in their respective slots, ensuring that all screws are secure and tight.

Next, adjust the latch jaw so that it fits into or partially covers the strike plate. For optimal security and ease of use, there should be no gaps between these two components when they are properly connected. Once all adjustments have been made, insert the cylinder piece into your deadbolt and secure to your door jamb with its corresponding screws.

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