Guide to Changing the Locks on Your House

One of the most important things to do after buying a home is take steps to keep it safe. For some, that might mean installing security cameras or other safety measures. But something as simple as changing locks on your house can go a long way when it comes to adding an extra layer of security. So, how do you replace the locks in your house? And should you call a professional, or is this a potential DIY project? This Redfin article covers all that and more.

Why should I change the locks on my new house?

While the existing locks on your house probably work just fine, it’s still recommended to replace them after moving in for security reasons. If the previous owner ever lost their keys and kept the same locks, a replica could be floating around, which could be a problem if they ever fell into the wrong hands.

It’s also an opportunity to upgrade — maybe you want a smart lock for convenience or a style that better matches your home’s curb appeal. Once you’ve decided on the type of locks you want, the process for changing them is straightforward. Here’s how to do it:

How to change locks on your house

1. Take an inventory of all the doors that need new locks

Make a note of how many of your house’s doors lead outside. Each of these doors will need new locks, not just the main entrance, so you’ll need to buy a new lock for each.

2. Buy new locks and gather tools

When buying new locks, an important detail to keep in mind is the brand of the old ones. In many cases, different locks from the same brand will fit better than those from another company.

In terms of tools, this is a relatively simple project. You should only need a measuring tape to make sure the new lock fits the opening and a screwdriver to remove the old lock and install the new one.

3. Remove the old locks from the door

To remove the existing locks from your doors, begin by using your screwdriver to remove the screws that are holding them in place. From there, you can remove the outside plate, then open the door and unscrew the plate on the side as well as any other components of the lock.

4. Install the new lock into the door

Once the old lock has been removed, it’s time to install the new one. Be sure to closely follow the instructions on the lock kit, placing the deadbolt and other parts into the proper place before securing them in place with screws.

5. Test the new locks

New locks are great, but it doesn’t matter if they don’t do the job they’re designed to do. Make sure you test out each of the locks after installing them. Defective locks will give you a false sense of security and leave your home vulnerable to intruders. If any components of the lock seem loose or the door doesn’t lock properly, consider reinstalling the lock or calling a professional to check it out.

6. Make extra copies of keys for the new locks

After your new locks have been installed, all that’s left to do is make keys for those locks. Make sure everyone who lives in the house with you has their own copy of the key. 

Pro tips for smoother installation and better security

• Key all locks the same. Have a locksmith or hardware store set your new locks to use a single key. This makes it easier to get in and out without fumbling for the right one, especially if you have multiple exterior doors.
  
• Upgrade the strike plate. Install a heavy-duty plate with 3-inch screws that anchor deep into the wall stud, not just the door frame. This simple upgrade can make it much harder for someone to force the door open.
  
• Keep old locks and keys. Store them in a labeled bag in case you want to reinstall them later. This can come in handy if you move, rent out the property, or need to return the home to its original condition.
  
• Check door alignment first. A poorly aligned door can keep even a new lock from working smoothly. Look for signs like the door sticking, the deadbolt not lining up, or needing extra force to close.
  
• Choose rekey-friendly locks. Some brands let you rekey at home without replacing the entire lock. This is useful if you lose a key, have a tenant move out, or simply want to change keys without buying new hardware.

FAQs about changing the locks on your house

How much does it cost to change locks on a house?

On average, locksmith services like replacing locks and rekeying cost between $130-$320. Keep in mind that hiring a locksmith will also incur labor costs on top of the cost of buying the actual locks. If you can handle home improvement projects on your own, doing it yourself might be the way to go.

When should I call a professional to change a lock?

If you’re not particularly handy when it comes to DIY projects, it’s probably best to leave this to the pros. Additionally, if you’re installing a more complex lock, like a smart lock, self-installation might not be an option.

Should I rekey locks instead of replacing them?

Rekeying locks, or changing the locking mechanism so that a new key unlocks it, is a less expensive alternative to completely changing the locks. This is a solid option if you’re happy with the current condition of your locks. However, if your house’s locks are in poor shape, this might not be the best solution.