Rekey or Replace? How to Decide When You Move Into a New Brisbane Home

Congratulations. The contract's settled, the removalists are booked, and a fat envelope of keys has just landed in your hand. Before you get lost in boxes, there's one job worth doing in the first week: dealing with those locks. Because here's the uncomfortable truth about a set of keys handed over at settlement, you have no idea how many copies of them are out there.

The question almost every new homeowner asks is the same: should you rekey the existing locks or replace them entirely? Both make you the only person who can open your doors, but they solve the problem in different ways, at different costs, and suit different situations. Here's how a locksmith thinks it through, so you can make the call with confidence.

Why change the locks when you move into a new home at all?

Think about the journey those keys have taken. The previous owners almost certainly cut spares, for kids, parents, the cleaner, the dog walker, or a neighbour who waters the plants. Real estate agents, property managers, tradespeople and past tenants may all have had a copy at some point. None of those people are necessarily a threat, but you can't account for a single one of them, and you can't un-cut a key that's already out there. Changing your locks on the way in is the one moment you get to reset that completely and know, for certain, that the only keys that work are the ones in your pocket.

What's the actual difference between rekeying and replacing?

They sound interchangeable, but mechanically they're very different jobs. Understanding what's happening inside the lock makes the decision much clearer.

What does rekeying a lock actually involve?

Rekeying changes what key opens the lock without changing the lock itself. Inside every standard pin-tumbler cylinder is a row of small spring-loaded pins, each cut to a specific height. When the right key slides in, it pushes every pin to exactly the height that lets the cylinder turn. To rekey, a locksmith removes the cylinder, takes out the old pins and drops in a new combination matched to a brand-new key. The old key now pushes the pins to the wrong heights and simply won't turn. The lock body, the handle and the bolt all stay exactly where they are; only the internal code has changed. It's quick, it's economical, and it's why rekeying is the default recommendation for most house moves.

What does replacing a lock involve?

Replacing means removing the entire lock (cylinder, body, hardware and all) and fitting a brand-new unit in its place. You're paying for the new hardware as well as the labour, so it's a bigger job than a rekey, but you also end up with a lock that's new from the ground up. That matters when the existing hardware is worn out, damaged, outdated, or simply not up to the security standard you want. It's also your chance to change the type of lock entirely, stepping up from a basic knob to a proper deadbolt, or from a tired old mortice lock to a modern high-security cylinder that resists picking and bumping. In a coastal, humid city like Brisbane, a fresh, well-sealed lock also gives you a clean starting point before the salt air and moisture start their slow work again.

When does rekeying make the most sense?

For a lot of new Brisbane homeowners, rekeying is the smart, efficient choice. It's usually the right call when:

• The existing locks are good quality, work smoothly, and are only a few years old.
• Your priority is simply making sure no old keys work anymore.
• You want several doors brought onto one key without buying all-new hardware.
• The house has a lot of doors and you'd rather spend on security than on identical new locksets.
• The hardware suits the look of the home and you're happy to keep it.

When should you replace the locks instead?

Sometimes a fresh start is the better investment. Lean towards replacement when:

• Locks are stiff, sticking, corroded or clearly past their best, which is common on older Brisbane homes exposed to humidity and salt air.
• The hardware is dated or doesn't meet current security standards, with no real deadbolt on an external door.
• A lock is already damaged, has been forced, or the key is hard to turn.
• You're upgrading anyway, moving to keyless entry, a smart lock, or a higher-security cylinder.
• The style no longer suits a renovation, and you want the security upgrade and the new look in one go.

What about putting everything on one key?

One of the quiet perks of dealing with your locks at move-in is keyed-alike convenience. Whether you rekey or replace, a locksmith can set compatible locks so a single key opens your front, back, laundry and garage doors. Fewer keys means you're far more likely to actually lock every door every time, which is a security win as much as a convenience. It also means no more standing at the back door in the dark trying four near-identical keys before you find the right one. Larger properties, or those with a granny flat or a separate studio, can go a step further with master keying, where one key runs everything and other keys open only certain doors, which is handy if you ever rent out a room or want tradespeople limited to a single entrance.

Should you do the whole house in one go?

Generally, yes, and it's cheaper to do it together than to call someone back twice. A half-secured house isn't secured at all; there's little point rekeying the front door if the back door, the laundry and the internal garage door still take an old key. A locksmith will typically work through every external lock in a single visit, get them onto a common key if you want, and flag any that are better replaced than rekeyed while they're at it. Whether the answer for your place is rekeying or replacing your locks, doing it as one job means you walk away knowing the entire perimeter is on keys only you hold.

Can you just do this yourself?

You'll find rekeying kits and cheap locksets at the hardware store, and for a confident DIYer a single like-for-like lock swap is achievable. But there are good reasons most people hand a whole-house job to a professional. Rekeying involves small pins and springs that are easy to lose or mis-seat, and a lock that's reassembled slightly wrong can jam you out of your own home. Matching multiple doors to one key, fitting a deadbolt into a door that never had one, and making sure everything aligns and throws properly is fiddly, tool-heavy work. A residential locksmith does the lot in a single visit, guarantees it works, and can tell you on the spot which locks are worth keeping and which have had their day, advice a hardware-shop kit can't give you.

Sorting your locks is the first move, and it's worth thinking about the rest of the house too. Our locksmith's checklist for burglar-proofing your Brisbane home covers the strike plates, sliding doors and windows that decide how secure your new place really is.

Just moved in and want the peace of mind that comes from knowing every key is accounted for? UrgentKey Services rekeys and replaces locks across Brisbane, brings your doors onto one key, and gives you a straight answer on what each lock needs. Get in touch for a free quote and make your new home properly yours.