Most rekeying calls come in right after a move, when the boxes are still stacked by the wall and the question of who still has a key becomes hard to ignore. We handle that at the door, on the property, because this is mobile work and there's no shop to visit. If you're settling into a place in Glen Mills, near West Chester, or anywhere in our service area, we can change the pinning inside your existing locks so old keys stop working and the hardware stays in place.
Rekeying makes sense when a tenant moved out, a contractor had access, a key went missing, or you just want the front door and back door to open with one key instead of a handful. We work with the lock you already have when it's in good shape, and we'll tell you plainly if a lock needs repair or replacement instead. The process is a good fit for most homes because it keeps your doors the way they are while changing who can get in. That means less disruption for you and a clean reset for the people who should still have access.
We bring the parts and tools with us and do the work where you are, whether that's a house, townhouse, or rental property. We can rekey deadbolts, knob locks, and matching sets, and we can also set up more than one lock to work from the same key when that's the right answer for the place. If you've just moved in, lost track of extra copies, or want to hand a property over with a fresh key setup, this is usually the first job to take care of.
When you actually need this
Rekeying is the answer whenever the hardware is sound and the problem is who holds a key.
The clearest case is a house that has just changed hands. The keys handed over at closing are the keys somebody chose to hand over - not a complete set, and nobody involved can tell you what a complete set would be. Previous owners, their families, contractors from a renovation nobody mentioned, cleaners, dog walkers, agents. None of them are necessarily a threat; the point is that the number is unknowable.
The same logic covers a tenant moving out, a relationship ending, a contractor who never returned a key, or a key simply lost - particularly if it was lost with anything identifying the address.
It is not the answer when the lock itself is the problem. A cylinder that sticks, drags or has corroded from years of weather will still stick after rekeying, because nothing about its condition has changed. Neither is it the answer where there is no deadbolt at all, or where a builder-grade unit was never up to an exterior door.
The useful question is not how old the lock is. It is whether that lock, working perfectly, would be the right lock for that door.
How the work is done
The cylinder comes out of the lock. Inside it sits a stack of small pins of varying heights, and their particular arrangement is what decides which key shape will turn it and which will not.
Those pins are removed and replaced with a different combination. A key is cut to match that new combination, the cylinder is reassembled and goes back into the door.
That is the whole of it, and the significance is in what does not happen. The lock body stays. The handle, the finish, the strike and the door itself are untouched. Nothing is drilled and on most types nothing is even unscrewed from the door face. The lock is exactly as secure as it was, because its construction has not changed - only the combination it answers to.
Where several doors are being done, the pinning can be chosen so that one key operates all of them, provided the cylinders are compatible types.
When the work is finished, every key that used to open those doors is scrap metal, and the only keys that work are the ones now in your hand. That is the entire point of the exercise, and it is why it is quicker and less invasive than replacement.
What it takes to do it properly
Less exotic equipment than most locksmithing, and more care than it looks.
The pinning has to be right. Pins are supplied in graded sizes and the combination has to be assembled deliberately, not approximately - a stack that is close but not correct produces a lock that turns today and starts sticking within months, and the customer blames the rekey rather than the pinning.
The cylinder has to be sound before it is reassembled. If the plug is loose in its housing, the keyway is rounding off, or the internals no longer hold tolerances, rekeying it is putting a new combination into a lock that is already failing. A locksmith who notices that and says so is saving you a second visit.
Where doors are being keyed alike, the compatibility has to be checked rather than assumed. Different manufacturers and different keyways sometimes make it impossible on part of a house - that is a hardware fact, and the honest answer is either to swap one or two cylinders to bring everything onto a single system, or to tell you plainly which doors cannot join it.
And every key gets tested in every lock before anyone leaves.
Getting it right the first time
The most common failure is not technical at all - it is a door that got missed. The front door always gets done. The side door into the garage, the door from the garage into the house, the basement door, the shed and the gate frequently do not. One back door left on the old key undoes the whole exercise, because the key you were trying to retire still opens something.
The fix is to walk the outside of the property and count every lock before deciding scope, including the ones that are not on doors. The mailbox belongs on that list too - it is where new cards and account documents arrive.
The second failure is thinking only about keys. A rekey does nothing to a garage door remote, a keypad code somebody still knows, or a lockbox left hanging on a spigot from the sale. Those outlive the rekey and almost nobody thinks of them on the day.
The third is rekeying a lock that needed replacing. If a cylinder was stiff beforehand it will be stiff afterward, and the visit will have to happen again.
All three are avoided by looking at the whole property once, deliberately, before starting.
What to have ready
A count of the doors, including the ones that are easy to forget - garage, side, basement, shed, gate. If you are not certain, we will walk it with you when we arrive, but knowing in advance means the right number of pins and blanks travels.
Every key currently in existence, including ones you believe are dead. Knowing what is in circulation shapes what we recommend, and a key you cannot account for is itself an argument for doing this.
A decision on keying alike. One key for the whole house is convenient and it is what most households want; it also means a single lost key exposes everything. Neither answer is wrong, but it is better decided deliberately than discovered afterward.
If you rent, your landlord's agreement. Many leases require it, and usually require a key being provided to them.
On the day the household carries on around the work. Doors are done in sequence so the property is never standing open, and the door, frame and finish are meant to look exactly as they did. Before we leave, you test the keys yourself in every lock - not because we have not, but because you should see it work.
Related services
Lock Rekeying rarely stands entirely on its own. These are the jobs most often booked alongside it, all under residential locksmith services.
- Lock Replacement — Worn, outdated or compromised locks swapped for solid modern hardware.
- Deadbolt Installation — A grade-rated deadbolt fitted properly, with the strike and strike screws that actually make it hold.
- Lock Repair — Sticking, loose or misaligned locks diagnosed and fixed instead of needlessly replaced.
- Smart Lock Installation — Keypad and app-controlled smart locks installed, aligned and set up so they work every single time.
- Door Lock Repair — Door hardware realigned and repaired so the latch catches smoothly again instead of being shouldered shut.
- Mailbox Lock Replacement — New mailbox locks and keys, including cluster-box units in condos and apartment communities.
- High-Security Lock Installation — Pick-resistant, drill-resistant locks with restricted keyways, so nobody copies your key at a kiosk.