How Does Rekeying a House Work? A locksmith changes the internal keying of an existing lock cylinder so the old key no longer operates it, then provides a key that matches the new configuration. The lock itself can usually stay on the door. For Ottawa homeowners, rekeying is often a practical choice after moving, losing control of spare keys, or wanting several compatible locks to operate with one key.
The important distinction is that rekeying changes which key opens a lock; it does not automatically replace worn, damaged, or outdated door hardware. A locksmith will normally inspect the locks first, determine whether they can be rekeyed, and recommend replacement only where the condition or compatibility of the hardware makes that the better option.
How Does Rekeying a House Work Step by Step?
Most conventional residential locks contain a cylinder with small internal components that must align correctly before the plug can rotate. In a common pin-tumbler cylinder, the cuts on the key position pins at the shear line. If the key does not create the correct alignment, the cylinder cannot turn.
Rekeying changes that internal combination rather than changing the whole lock. For a typical compatible cylinder, the process generally looks like this:
- The locksmith checks the doors and identifies the lock brands, cylinder types, condition, and keyways.
- The relevant cylinder is accessed or removed from the lock hardware.
- The cylinder is disassembled sufficiently to change its keying components.
- New components are matched to the cuts of the new key.
- The cylinder is reassembled and tested with the new key.
- The lock is checked from both sides of the door to confirm normal locking and unlocking.
- Where compatible locks are being keyed alike, the same process is completed on the other cylinders.
Once the work is complete, a correctly rekeyed cylinder responds to the new key while the previous key no longer operates that cylinder. Ottawa homeowners who want this done professionally can find more detail about residential rekey services in Ottawa.
What Parts of the Lock Actually Change?
The answer depends on the lock design. With a standard pin-tumbler lock, a locksmith typically changes or rearranges the pins inside the cylinder so they correspond to a different key. Other rekeyable lock designs may use different internal components or manufacturer-specific procedures.
The exterior lock body, handles, deadbolt housing, strike and much of the existing hardware can often remain in place. That is one reason rekeying can make sense when the locks are mechanically sound and the goal is simply to make old keys unusable.
This is also why rekeying should not be treated as a repair for every lock problem. A loose deadbolt, heavily worn cylinder, damaged latch or unsuitable door hardware may need repair or replacement instead. Homeowners dealing with those issues can compare the situation with a residential lock change, where the hardware itself is replaced rather than merely given a new key combination.
When Does Rekeying a Home Make Sense?
A recent move is probably the most familiar example. Even if the seller gives you every key in their possession, there is rarely a practical way to know whether an older copy remains with a former resident, contractor, cleaner, neighbour, family member, or anyone else who previously had authorized access. Rekeying establishes a new starting point for physical key control without necessarily throwing away serviceable locks.
The same reasoning applies after a tenant change in a rental property, after household circumstances change, or whenever keys have circulated beyond the people who should currently have access. A lost key can create a similar question. The relevant issue is not simply that the key is missing, but whether somebody could connect it to your home. Our guide on whether to rekey or replace locks after losing house keys explains that decision in more detail.
Rekeying can also simplify an awkward collection of household keys. If compatible door locks share a suitable keyway, a locksmith may be able to key them alike. Instead of carrying one key for the front door and another for the side or back entrance, the homeowner can use a single key for several locks.
Can Every Lock in a House Be Rekeyed to the Same Key?
No. Keying several locks alike depends on compatibility. Locks generally need compatible cylinders and keyways, and hardware from different manufacturers or product families may not accept the same key. A locksmith needs to inspect what is actually installed rather than assuming every cylinder in the house can be put on one key.
There are also exceptions within modern residential hardware. Some products have user-rekeyable features, while electronic and smart locks may rely on PIN codes, electronic credentials, a mechanical backup cylinder, or a combination of these. Changing a digital access code is not necessarily the same procedure as mechanically rekeying a cylinder.
If an Ottawa home has a mixture of conventional locks and electronic hardware, a residential locksmith can assess the door hardware together instead of treating each lock as an isolated component. This is useful when the broader goal is consistent access across the home.
Rekeying vs. Replacing a Lock
Rekeying and lock replacement solve different problems. Rekey when the existing hardware works properly and the main objective is to invalidate old keys. Replace the lock when the hardware itself is damaged, badly worn, unsuitable for the door, incompatible with the desired key setup, or when you want to upgrade the locking hardware.
Consider an otherwise solid front-door deadbolt after a house purchase. If its condition is good, changing the internal keying may be all that is needed to establish new key control. If that same deadbolt sticks badly, has excessive movement, or is physically damaged, rekeying alone does not correct those mechanical issues.
An upgrade can also change the answer. Someone who wants to add or replace a deadbolt may be better served by deadbolt installation rather than retaining the existing configuration. The decision should follow the condition of the door and lock, not a blanket rule that rekeying is always preferable to replacement.
What Should Ottawa Homeowners Expect During a Rekey Appointment?
The first part is usually an assessment. It helps to show the locksmith every exterior door that should be included, along with any keys currently used for those locks. The locksmith can identify which cylinders are rekeyable, whether the locks are compatible with one another, and whether any hardware condition needs attention.
For several doors, it is worth deciding in advance who should have keys and whether compatible locks should operate from the same key. That conversation is much easier before the cylinders are configured than after the job is finished.
The physical work is generally localized to the lock cylinders. There should not normally be a need to replace the whole door simply to rekey an otherwise suitable lock. Afterward, each affected lock should be tested. The new key should operate smoothly and the old key should no longer unlock the rekeyed cylinders.
Homeowners should also remember that a lock is only one part of a secure entrance. Door condition, frame integrity, strike alignment, glazing and the way keys are managed all matter. The Ottawa Police Service home security guidance provides broader crime-prevention considerations that can complement decisions about locks and keys.
How Long Does It Take to Rekey a House?
There is no reliable one-size-fits-all time because houses vary. The number of cylinders, lock types, condition of the hardware, compatibility between doors and whether problems are discovered during inspection all affect the job. A straightforward home with a few conventional, compatible locks is different from a property with mixed manufacturers, older hardware and electronic locks.
If timing matters, tell the locksmith how many exterior locks you want addressed and, where possible, what types of locks are installed. An on-site inspection is still the best way to establish what work is actually required.
How Much Does House Rekeying Cost in Ottawa?
Cost likewise depends on the property rather than simply the number of doors. A locksmith may need to account for the number and type of cylinders, compatibility, key requirements and any hardware problems that fall outside ordinary rekeying. Asking for the scope of work to be explained before proceeding makes it easier to understand what the quoted service covers.
If an inspection shows that one lock should be replaced while others can be rekeyed, the job does not have to be all-or-nothing. A mixed approach can be reasonable: retain and rekey suitable hardware, while replacing only components that are worn, damaged or incompatible.
What Should You Do With Old Keys After Rekeying?
Once you have confirmed that the old keys no longer work in the rekeyed locks, separate or discard keys that are no longer useful so they are not confused with the new set. More importantly, decide who actually needs copies of the new key.
Rekeying gives a household a fresh point of control, but making unnecessary copies immediately recreates the uncertainty the service was intended to address. Keep track of keys provided to family members, caregivers, contractors or other authorized people. If access needs change later, you will have a much clearer idea of which keys are in circulation.
A Few Details Worth Checking Before the Locksmith Leaves
Try each new key in every cylinder that was supposed to be included. A properly operating key should insert and turn normally without needing unusual force or a particular wiggle. Check the lock with the door both open and closed, because resistance that occurs only when the door is closed may point to door or strike alignment rather than the rekey itself.
Confirm which locks are keyed alike, if that was part of the plan, and identify any garage, shed or secondary entrance that was intentionally left on a different key. This simple check avoids uncertainty later. If a lock remains stiff or has another mechanical problem, address that separately rather than assuming a new key configuration will correct worn hardware.
Frequently Asked Questions About House Rekeying
Does rekeying mean my old house keys will stop working?
Yes, for the cylinders that have been successfully rekeyed. Their internal configuration is changed to operate with a different key, so the former key should no longer unlock them. Test both the new and old keys after the work is completed.
Should I rekey my locks after buying a house in Ottawa?
It is a sensible option when the existing locks are in good condition but you cannot account for every previous key copy. Rekeying gives the new household control over a fresh set of keys without automatically requiring complete lock replacement.
Is it cheaper to rekey or replace a house lock?
The answer depends on the hardware and the work required. Rekeying retains suitable existing hardware, while replacement includes new hardware and installation. A locksmith should first determine whether the existing cylinder is rekeyable and whether the lock is in good enough condition to keep.
Can one new key open my front, side and back doors?
Potentially. The locks need compatible keyways and suitable cylinders. If the doors use incompatible hardware, they may not all be keyed alike without changing some components.
Can smart locks be rekeyed?
Some smart locks have a mechanical key cylinder that can be rekeyed, while others use different access systems or manufacturer-specific features. Changing a PIN or electronic credential is not the same as rekeying a conventional cylinder. If upgrading is the goal, smart lock installation options can be assessed separately.
Will rekeying fix a lock that is sticking?
Not necessarily. Rekeying changes which key operates the cylinder; it is not automatically a repair for damaged parts, door misalignment or worn hardware. A sticking lock should be diagnosed so the underlying cause can be addressed.
Planning a House Rekey in Ottawa?
How Does Rekeying a House Work in practice? It starts with identifying which locks are worth keeping, confirming their compatibility, and changing the relevant cylinders so previous keys no longer provide access. For many homeowners, that is a straightforward way to regain control of household keys without replacing serviceable hardware.
If you have moved into an Ottawa home, lost track of spare keys, or want compatible exterior locks keyed alike, S.O.S Locksmith Ottawa can inspect the existing hardware and explain whether rekeying, replacement, or a combination of the two makes sense for your doors. Contact the team to discuss your residential rekey needs and the locks currently installed in your home.
