Lock Rekey vs Replace: Which Is Better for Your Home?

You just moved into a new home. Or maybe a spare key is missing. Or a contractor who had access no longer works with you. Whatever the reason, you are now thinking about whether to rekey or replace your locks. Both options solve the same core problem but in different ways and at different costs. Understanding the difference helps you make the right call without spending more than you need to.

What Is Lock Rekeying and How Does It Work?

When a locksmith rekeys a lock, they open the lock cylinder and replace the internal pins. After that, the old key no longer works, and only the new key opens it. The lock hardware itself stays in place. Nothing gets swapped out on the door or the frame.

Lock rekeying in Philadelphia is the go-to option when the lock itself is in good condition, but you want to cut off access for someone who had a key. It is faster, costs less, and gets the job done without any installation work.

When Rekeying Makes Sense

• You just bought or rented a property and want the old keys voided
• A roommate, tenant, or employee left and still has a key.
• You lost a key and are not sure if someone found it.
• You want all your door locks to operate on one key.

Rekeying typically costs between $20 and $50 per lock for the service, according to industry averages across the US. If you have multiple locks, the cost stays low because the hardware stays the same.

What Is Lock Replacement and When Do You Need It?

Lock replacement means the entire lock hardware gets removed and a new one goes in. This includes the cylinder, the bolt mechanism, and, in some cases, the strike plate as well. The locksmith removes the old unit and installs a new one from scratch.

Lock replacement in Philadelphia makes sense when the lock itself has a problem that rekeying cannot fix. A damaged lock, an outdated mechanism, or a security upgrade all call for replacement rather than rekeying.

When Replacement Makes More Sense

• The lock is old, worn, or does not turn properly
• The lock was damaged during a break-in attempt
• You want to upgrade to a higher-grade deadbolt or smart lock
• The current lock brand or grade does not meet your security standard

Lock replacement costs more because of the hardware. A basic deadbolt runs from $30 to $100 or more, depending on the brand and grade, plus the labour for installation.

Read More: How Mobile Locksmiths Are Equipped for Any Emergency

The Cost Difference Between Rekeying and Replacing

This is where most homeowners make their decision. If your lock works fine and you just need access control, rekeying is the cheaper path. If the hardware needs to go, replacement is the only option regardless of cost.

Here is a straightforward comparison:

If you have five locks in the house and all you need is to void old keys, rekeying all five will cost a fraction of replacing them.

What About Security Grade? Does Rekeying Change It?

Rekeying does not upgrade the security grade of a lock. If you have a Grade 3 residential lock and you rekey it, you still have a Grade 3 lock. The pins change, but the hardware stays the same.

The American National Standards Institute grades locks from Grade 1 to Grade 3, with Grade 1 being the most resistant to forced entry. If your home currently has lower-grade hardware on exterior doors, a deadbolt installation with a Grade 1 or Grade 2 lock is worth looking at alongside whatever access control decision you make.

Can You Rekey Locks Yourself?

Rekeying kits are sold at hardware stores, and some homeowners do try this. The process requires a specific tool called a follower and the right replacement pins for the lock brand. One wrong pin size and the lock jams. Most people find it is not worth the risk on an exterior door lock, especially if they have not done it before.

A locksmith gets it done in minutes per lock, and you know it works correctly the first time.

What Philadelphia Homeowners Often Overlook

Many homeowners rekey or replace the front door lock but forget about the back door, the garage entry door, or a basement entry point. A home lockout situation often reveals that secondary entry points were never given the same attention as the front door.

If you are going through the process of changing access after a move or a key loss, check every exterior entry point while you are at it.

Kingstone Locksmith Philadelphia handles both rekeying and lock replacement for homes across the city. If you are not sure which option fits your situation, contact us, and we will take a look at what you have and give you a straight answer on the best path forward.