When your home security needs a refresh, you have two main options: rekeying your existing locks or replacing them with new hardware. Both accomplish the goal of making old keys stop working, but they differ in cost, time, and the level of security upgrade you get. Here is how to decide which approach makes the most sense for your situation.

What Does Rekeying Mean?

Rekeying is the process of changing the internal pins inside your lock cylinder so that the old key no longer works. A locksmith removes the lock from the door, takes apart the cylinder, replaces the pin tumblers, and reassembles everything. You get new keys that work with the same physical lock hardware.

From the outside, nothing looks different. The lock body, finish, and handle all stay the same. Only the internal mechanism changes.

What Does Replacing Locks Mean?

Replacing locks means removing the entire lock assembly and installing brand-new hardware. This includes a new lock body, cylinder, strike plate, and keys. You can choose a completely different style, brand, or security level.

When Rekeying Is the Better Choice

Rekeying makes sense when your locks are in good physical condition and you simply need to change who has access. Here are the most common scenarios.

After moving into a new home. You have no idea how many copies of the existing keys are floating around. Previous owners, their friends, old contractors, and real estate agents may all have copies. Rekeying every exterior lock gives you a fresh start at a fraction of the cost of full replacement.

After a roommate or tenant moves out. If someone who had a key to your home is no longer welcome, rekeying is the fastest and cheapest way to secure your space.

When you want all locks on one key. If your front door, back door, and garage entry all use different keys, a locksmith can rekey them all to work with a single key. This is convenient and costs far less than buying matching new locks.

When the lock hardware is still in good shape. If your deadbolts and knobs are sturdy, functioning smoothly, and you like the way they look, there is no reason to replace them just to change the key.

When Replacing Is the Better Choice

Full lock replacement is worth the investment in these situations.

Your locks are old, worn, or damaged. If keys stick, the deadbolt does not throw smoothly, or the lock feels loose in the door, replacing it is the right call. Worn locks are easier to pick and force open.

After a break-in or attempted break-in. If someone has physically damaged your lock, a rekey will not fix the structural compromise. You need new hardware, and this is a good opportunity to upgrade to a higher-security option.

You want to upgrade your security level. Standard residential locks come in different grades. If you currently have Grade 3 builder-grade hardware and want to step up to a Grade 1 deadbolt or a smart lock system, replacement is the way to go.

The lock style is outdated. If you are renovating or simply want your entry hardware to match your home’s updated look, replacing gives you full control over the style and finish.

Cost Comparison

Here is a realistic cost comparison for a home with three exterior doors in the Austell, GA, area.

Rekeying three locks: $50 to $90 total. This includes labor and new keys. Rekeying is straightforward work that a locksmith can complete in 30 minutes or less.

Replacing three locks: $225 to $600 total. This includes new lock hardware and installation. The cost depends heavily on the brand and security grade you choose. A basic Kwikset deadbolt costs less than a Medeco high-security lock.

The bottom line: rekeying costs roughly one-third to one-quarter of a full replacement.

Can You Rekey Locks Yourself?

Some hardware stores sell rekey kits for specific lock brands. However, rekeying requires precision. If the pins are not set correctly, the lock may jam, fail to latch, or become easier to pick. A professional locksmith handles this quickly and guarantees the work.

The Best of Both Worlds

In many cases, homeowners benefit from a combination approach. Replace the locks that are worn out or inadequate, and rekey the ones that are still solid. A residential locksmith can assess each lock and recommend the most cost-effective plan for your home.

Let BBN Locksmith Help You Decide

Not sure whether to rekey or replace? BBN Locksmith offers free on-site assessments for homeowners in Austell, GA, and the surrounding communities. We will inspect your locks, explain your options, and give you an honest recommendation based on your security needs and budget.

Call (470) 280-6544 to schedule your assessment or get immediate service. We are here 24/7.