If a roommate has moved out or a relationship has ended and you're not completely certain every copy of your key is accounted for, rekey the home. This isn't about assuming the worst of anyone. It's about the simple fact that once a key has existed outside your control, you genuinely don't know how many copies were made, who has one, or where they are now.
This situation is more common than most homeowners think about until they're in it, and it comes with a level of urgency that a routine lock upgrade doesn't. You're not planning ahead. You're trying to feel safe in your own home right now, today, and that's a completely reasonable thing to want.
This guide covers when rekeying makes sense, why it beats a full lock replacement in nearly every case, what to do about garage codes and smart lock access, the legal line when both names are on the title or lease, and how quickly this can actually get done.
Rekey any time someone who had a key to your home no longer lives there and you can't say with certainty that every copy has been returned or destroyed. That includes an amicable roommate departure, not just a difficult one, since even a friendly ex-roommate might have made a spare copy months ago and forgotten to mention it.
The instinct to skip rekeying because the person left on good terms is understandable but doesn't actually address the risk. A key doesn't know whether the relationship ended well. Once it exists, it works in the lock regardless of anyone's intentions, and the only way to guarantee it stops working is to change what the lock accepts.
Some situations call for rekeying immediately rather than on your own schedule: if the departure was contentious, if you don't know how many keys were ever cut, if a key was given to someone briefly and you're unsure it came back, or if you simply want to feel settled and secure in your space again. None of these require you to justify the decision to anyone. Wanting control over who can enter your own home is reason enough on its own.
Rekeying changes the internal pins inside your existing lock so old keys stop working, while keeping the same lock body, handle, and exterior hardware. It accomplishes exactly what you need, invalidating every key that used to work, without the cost or time of replacing hardware that isn't actually broken.
A locksmith removes the lock cylinder, replaces the small internal pins with a new combination, and cuts you a fresh set of keys that match only the new pin arrangement. Every previous key, no matter who has it or how many copies exist, simply stops working the moment that's done. The lock itself, the deadbolt, the strike plate, the exterior finish, none of that needs to change.
Full replacement makes sense when the hardware itself is outdated, damaged, or you want to upgrade to a different lock grade or brand, which our guide on rekeying versus replacing locks in Calgary covers in more detail. But if your current locks are in good working condition, rekeying gets you the same security outcome for meaningfully less money and less time in your day.
A physical key rekey doesn't touch electronic access, so if your home has a garage door code, a smart lock with a saved user list, or an app that grants entry remotely, each of those needs to be changed separately and specifically. This is the step people forget most often, and it's just as important as the physical lock.
Garage door keypad codes are usually simple to reset yourself through the opener's settings, and it's worth doing the same day as any physical rekey, since a garage often provides direct access into the home itself. If you're not sure how to reset your specific opener model, the manufacturer's instructions are typically inside the garage on the unit itself or in the manual that came with the house.
Smart locks require more attention than a mechanical rekey, since they don't have pins to change, they have a stored list of authorized users, codes, or paired devices. Go into the lock's app or its physical keypad settings and remove every user profile you don't personally recognize as current, then reset the master code if the lock has one. Our guide on smart lock installation and use in Calgary covers how these systems handle user management if you're not familiar with your specific model.
Don't stop at the front door. Check any shared apps tied to your home, security system access, video doorbell sharing, a garage app, or a smart lock app, and remove access for anyone who shouldn't have it anymore. A physical key is often just one of several ways someone could still get in, and all of them deserve the same attention.
If both names are legally on the title or lease, you cannot unilaterally lock the other person out of a home they have a legal right to access, and doing so can create real legal exposure for you regardless of how the relationship ended. This is genuinely different from a roommate situation without shared legal ownership, and it deserves a straight answer rather than a vague one.
Locks and legal rights are two separate things. Rekeying changes who has a working key, but it doesn't change who legally owns or has a right to occupy the property. If someone with a legitimate ownership or tenancy claim is locked out, they may have legal recourse, and depending on the specifics of your situation, changing locks unilaterally could complicate a separation, divorce, or tenancy dispute rather than resolve it.
This is exactly the kind of situation where a family lawyer, not a locksmith, needs to weigh in before you act. We can rekey a lock in under an hour. We can't tell you whether you're legally allowed to exclude someone from a home you jointly own or lease, and neither can a locksmith anywhere in Calgary, regardless of what they tell you on the phone. If you're in this situation, a short conversation with a lawyer before the locks change can save you a much longer and more expensive problem afterward.
If you're the sole name on title or lease and the other person's legal right to the property has genuinely ended, rekeying is straightforwardly yours to decide, and there's no ambiguity to navigate.
Same-day rekeying is available in most of Calgary, and for a standard home with one or two exterior doors, the actual work typically takes under an hour once a locksmith arrives. You don't need to plan this days in advance or wait for a convenient slot next week if today is when you need it done.
Have your ID and something showing your address, a piece of mail, a utility bill, or your lease, ready when the locksmith arrives. This isn't a bureaucratic hurdle, it's the same safeguard that protects you: a locksmith rekeying a home confirms the person requesting the work actually has the right to authorize it, which matters most in exactly the kind of situation this guide is about.
If you're locked out entirely and dealing with this at the same time, our guide on what to do during a house lockout in Calgary covers getting back in safely first, and a rekey can typically happen in the same visit once you're inside.
Wanting to feel secure in your own home after a roommate leaves or a relationship ends is entirely reasonable, and it's one of the more common reasons Calgary homeowners call us. You don't need a dramatic reason to justify it, and you don't need to wait.
Key And Lock Solutions provides same-day residential rekeying across Calgary, with straightforward pricing and no judgment about the reason behind the call. Our full residential locksmith services cover rekeying, lock replacement, and smart lock setup for exactly this kind of situation, and if you're weighing whether to rekey or fully replace your hardware, our rekey or replace guide can help you decide.
If you need your home rekeyed today, contact us and we'll get someone out to you.
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We’re proud to be trusted by homeowners, businesses, and drivers across Calgary. Here’s what our customers have to say about their experience with Key And Lock Solutions.
★ ★ ★ ★ ★
A quick call and he booked me for same day service. Amazing person to work with, came equipped with everything I needed, was fast and efficient. Great dude with an amazing personality! 100% recommended! Thank You
Rich Potter
★ ★ ★ ★ ★
They were amazing. They immediately dispacthed a technician when I asked for help, no questions asked. He was knowledgeable, explained what he was doing and offered a much better solution to the problem I was having with my lock. I will be calling Key And Lock Solutions for all my lock needs. 10 out of 10.
Stacey Sailer
★ ★ ★ ★ ★
First a locksmith from a different company came and couldn’t get the job done (I locked myself out, stupid secure Schlage locks being good at their jobs lol!!) soooo the locksmith recommended Key And Lock Solutions which I am so thankful for because I got Gill and he saved the day along with my sanity.
Rhiannon Bullock
Whether you’re locked out, need new keys, or want to improve your property’s security, our team is here to help. We proudly serve Calgary with fast, reliable locksmith services for residential, commercial, and automotive needs. Reach out today and speak directly with a qualified locksmith.