The idea in one sentence
A lock is a small puzzle, and the key is the one answer that solves it. Rekeying keeps the same lock body but changes the puzzle inside, so the old answer no longer works and a new key becomes the only one that does. Anyone who was holding an old key suddenly finds that it slides in but will not turn.
That is the whole point. You are not changing the door, the handle, or the finish. You are changing who is allowed through. A household, landlord, or business can end a period of uncertainty about keys without paying for new hardware, and without anyone noticing a difference on the outside of the door.
Because the change happens inside the cylinder, it feels invisible. The lock looks the same, sounds the same, and sits in the same place. What has changed is the pattern it recognizes. This is why locksmiths often describe rekeying as a reset button for who has access, rather than as an upgrade of the lock itself.
If you want a broader overview of the service, the rekeying service page describes what is typically involved and when people ask for it. This guide focuses on the most important question: whose key works before the job, and whose key works after.
Think of it like changing the combination on a gym locker rather than buying a new locker. The metal box stays, the door stays, the place on the wall stays, but the secret that opens it is different. That comparison is imperfect, since a key is physical, but it captures the feeling of the change well.
What is happening inside the cylinder
Most residential locks are pin tumbler cylinders. Inside is a column of small pins of different lengths, sitting in holes above a rotating plug. When the correct key goes in, its cuts lift each pin to exactly the right height, creating a clean line that lets the plug turn. A wrong key leaves some pins sticking across that line, and the plug stays put.
Rekeying means opening the cylinder, removing the existing pins, and replacing them with a different set that matches a new key. The cylinder is put back together and tested. The old key now lifts the pins to the wrong heights, so it feels the same on the way in but cannot turn the plug. For a deeper picture, read how a pin tumbler lock works in plain words.
There is no need to understand each pin to appreciate the result. What matters is that the physical match between key and lock is a pattern, and that pattern can be changed on purpose. The locksmith picks a new pattern, cuts keys to suit, and verifies that both the new keys work and the old ones are rejected.
The locksmith chooses the new pin heights so that the new key has its own pattern of cuts. Cutting the key is a matter of following that pattern precisely, which is why a properly cut key slides in smoothly and turns without force. If a new key ever feels stiff, say so right away, because a small adjustment at the time costs far less effort than living with a rough key.
Tell the dispatcher the Orlando area, what happened and what you are standing in front of, whether a door, a vehicle or a gate.
CallWho loses access and who keeps it
After a rekey, every key cut to the old pattern stops working in that lock. That includes keys held by family, past roommates, former tenants, cleaners, contractors, neighbors, and anyone who borrowed one and copied it without telling you. It also includes keys you lost years ago and forgot about. All of them become useless in that door.
People who receive the new keys keep access. This is where you decide who should be on the list. A household might give one to each adult, a landlord might give one to the tenant and keep one on file, and a small business might hand them to staff on a plan. Treat the new set as a fresh start and allocate keys on purpose.
Remember that a rekey affects only the locks that were actually changed. If you rekey the front door but leave the back door alone, old keys that fit the back door still work there. Think through every entrance, including side doors, garage entries, and storage rooms, before you assume that old keys have been neutralized.
If you rent out a home, keep in mind that a rekey between tenants is one of the most common uses of the service. It lets the next resident start with a clean set while the owner decides how many keys are in circulation.
- Old keys for the rekeyed lock stop turning, even if they still slide in.
- New keys work in the rekeyed lock and nowhere else you did not change.
- Doors you did not rekey still accept their original keys.
- Copies made from old keys also stop working in the rekeyed lock.
- Digital codes and smart lock users are handled separately from physical keys.
A comparison with changing the whole lock
Replacing a lock gives you new hardware and new keys at the same time. Rekeying gives you new keys and an unchanged lock. The access result is the same: old keys are out. The difference lies in what else you want. If the lock is worn, damaged, or no longer meets your needs, replacement makes sense. If it is in good shape, rekeying keeps it.
Many people compare the two based on cost and appearance, but there are other factors. A replacement lets you upgrade to a stronger grade or add a smart feature. A rekey keeps matching hardware across several doors and avoids mixing finishes. Our guide on lock replacement or rekeying lays out the thinking in detail.
If you are unsure, ask the locksmith to look at the lock and explain what condition it is in. A lock with loose parts, rough turning, or damage might be better replaced. A smooth, solid lock is a good rekey candidate. The decision should come from the state of the hardware and your goals, not from a standard answer.
Another practical consideration is matching. If several doors are rekeyed to the same pattern, one key can open all of them, which many households find convenient. Others prefer separate keys for separate doors, for example so a visitor can reach a guest room without access to the main house. Either approach is possible, and it is worth deciding before the work begins.
Moments when a rekey makes sense
The most common moment is a move. When you take over a home or apartment, you cannot know how many keys exist or who holds them. Previous owners, tenants, agents, and contractors may all have copies. Rekeying on or before move in resets that count to the keys you hold. The move in lock changes page covers this scenario.
Another moment is after a loss. If a wallet, purse, or key ring went missing along with an address, the person who found it may have both a key and a place to use it. Rekeying after losing a wallet or purse explains why this step is worth considering even when nothing has happened yet.
Changes in a household also matter: a breakup, a roommate leaving, a divorce, or a staff member ending employment. Rekeying avoids relying on someone to return a key honestly. Read replacing locks after a roommate leaves for related advice. In each case, you remove uncertainty rather than wait for a problem.
One more caution: some people assume that rekeying has solved a security worry that really lies elsewhere. Do not stop after changing the keys if you also have an unlit entry, a hollow door, or a missing strike plate screw. Treat the rekey as one piece of a wider picture, and use it as a prompt to look at the rest.
What rekeying does not do
It is worth being realistic. Rekeying changes which keys work, but it does not make a weak door strong. If the frame is cracked, the strike plate is held by short screws, or the lock is a low grade model, a new key pattern will not fix those weaknesses. A rekey answers the question of who has keys, not the question of how tough the door is.
It also does not undo what has already happened. If someone entered before the rekey, the rekey does not reverse that. After a break in, you may want more than a rekey: repair of damage, a stronger strike plate, and a fresh look at the doors. See is rekeying enough after a break in for a measured discussion.
Finally, rekeying does not affect electronic access that lives outside the cylinder. A keypad code, a phone app credential, or a fob stored in someone else's pocket is a different channel. If your door has both a key and a digital method, remember to update the digital side as well, or you will have closed only one of two entrances.
If you are a tenant, put the request in writing where possible and keep a copy. Mention the reason, such as a lost key or a recent move, and ask what the rules say. A calm written request tends to produce a clear answer and a record you can point to later if there is any disagreement about who authorized the change.
Master keys and shared systems
Some buildings use master key systems, where several locks each have their own key and one higher key opens many of them. Rekeying one lock in such a system can interact with that structure. The locksmith needs to know how the system is arranged, who is responsible for it, and whether the rekeyed lock should remain part of it.
In an apartment complex or office, changing a lock without informing the manager can create confusion, and it may breach the terms of a lease or building policy. Requirements vary from place to place, so ask the landlord, property manager, or association before authorizing any change. Tenants especially should confirm what is allowed.
If you manage a business, the topic expands into key control. Master key terms: change key, master key, and control key gives vocabulary that helps you talk about a system clearly.
It is perfectly fine to ask questions during the work. Ask how many pins were changed, whether anything looked worn, and whether you should expect the lock to feel different. A professional expects these questions and answers them in ordinary language. If the lock does feel different, tell them before they leave, so adjustments can be made while everything is still open.
What the work looks like from your side
The process is straightforward. You call and describe the doors and the reason for the change. Before the locksmith rekeys anything, authority is checked: you may be asked to show identification and something tying you to the property. The work and the price are explained before work begins, and nothing starts until you agree.
For each lock, the locksmith opens the cylinder, changes the internal pattern, cuts new keys, and tests them. When the job is finished, the result is tested with you, so you can try each key and confirm that it operates smoothly. It is reasonable to ask to try an old key to see that it no longer turns, if you have one handy.
Bring every key you have to the visit, including spares, and decide beforehand how many new keys you want. It is simpler to cut the right number at the time than to return later, and it forces a useful conversation about who actually needs access to each door.
Keeping control of the new keys
A rekey is only as good as the habits that follow it. If you hand new keys out freely, copy them without thinking, or leave one in an obvious hiding spot, you slowly rebuild the same uncertainty you just removed. Treat the new keys as a defined set and write down who holds each one.
Think about key copies as well. Some keys are easy to duplicate at any counter, while others are restricted and need authorization. If you want to limit casual copying, ask about that when you rekey. The guide on restricted keyways and why they matter explains the idea in plain terms.
Plan for spares. A single key for a busy household is a lockout waiting to happen. How to plan spare keys for a household offers a sensible framework, and where to keep a spare key safely helps you place them wisely without advertising them.
Weather leaves marks on keys, too. Sweat, moisture, and storm humidity speed up tarnish on brass, and a key that spends all day in a pocket along with coins and other keys picks up scratches that make it a little rougher with time. Having a spare in a drawer, rather than leaving everything on one ring, helps preserve a clean original for future copies.
Heat, humidity, and long term wear
Central Florida weather is hard on hardware. Warm, damp air encourages corrosion, and constant use wears keys and pins. A rekey is a good moment to ask about the condition of the lock. If the cylinder feels gritty or the key drags, the locksmith can tell you whether it will stay reliable with fresh pins or whether the wear runs deeper.
Keys themselves wear too. A new key cut to the new pattern starts crisp, but copies of copies drift away from the original. Always make copies from the original or from a proper code when possible. See how worn keys affect locks for more on why this matters.
Lubrication also plays a part, and the wrong product can attract dust and make things worse. Lubricating a lock the right way describes safe habits. A rekeyed lock that is cared for properly can keep serving for a long time, which is one of the reasons the approach is so popular.
Many people find that after a rekey they feel something simple: relief. Not because the door is stronger, but because the unknowns have been removed. You know exactly which keys exist, who has them, and which ones are retired. That clarity is a quiet benefit that is hard to put a number on, yet easy to appreciate each time you lock up.
Bringing it all together
To summarize: rekeying changes the inside pattern of a lock so old keys stop working and new keys take over. It is a precise way to control who can enter without replacing the hardware. It suits locks in good condition, and it pairs naturally with decisions about spare keys, key copies, and digital access.
If you are deciding whether to do it, ask three questions. Do I know who holds every key? Is the lock in good shape? Have circumstances changed in a way that makes old keys a risk? If the answer to the first is no, or the third is yes, a rekey deserves serious thought.
When you are ready, call and describe your doors and your goal. Reach the team through the contact page to talk about a specific door.
Questions people ask
Will my old keys still fit into the lock after rekeying?
They may still slide into the keyway because the physical shape of the opening is unchanged, but they will not turn the cylinder. The internal pins are set to a new pattern, so the old key lifts them to the wrong heights. A good locksmith can show you this by trying an old key after the work.
Does rekeying also change my digital codes or smart lock access?
No. Rekeying addresses the physical key pattern inside the cylinder. Keypad codes, app credentials, and fobs live separately and must be updated on their own. If your door has both a key and a digital method, ask for both to be handled so that no old access remains.
Can every lock be rekeyed?
Most common residential and many commercial cylinders can be, but not all. Some locks are worn or damaged, and some are built in ways that make replacement more sensible. The locksmith will look at the hardware and explain whether rekeying suits it, and whether replacement would give you a better result.
Do I need to be the owner to have a lock rekeyed?
You need to show authority, which could be ownership, a lease, or permission from the person responsible for the property. Authority is checked before rekeying begins. Tenants should confirm with the landlord or building manager first, since rules about lock changes vary and some places require approval.
Should I rekey every door at once?
Often that is wise, because rekeying only some doors leaves old keys active on the rest. Many people rekey all exterior doors so one new key works throughout. It is also possible to do one door at a time, but think through which old keys still fit which locks.
How many new keys should I ask for?
Think about who truly needs access and add a spare or two for emergencies. Cutting the right number during the visit is simpler than going back later. Avoid handing out extras casually, and keep a written list of who holds each key so you can tell if something goes missing.