Re-key, replace, or smart lock? A Gold Coast door and lock guide

Re-key when the lock itself is sound and you only need to change who can open it. Re-keying alters the internal pins so the old keys stop working and a new key takes over. It's the cheaper move after you move house, after a break-up, after a tradie or cleaner has had a key, or when you want several doors running on one key. The hardware stays; only the key changes.

Replace when the lock is worn, sticking, rusted from the salt air, or simply not strong enough for an entry door. Coastal humidity from Coomera down to Kingscliff is hard on cheap hardware, and a lock that's grinding is a lock that will eventually fail at the worst time. Replacing also makes sense when you want to step up to a better grade of deadbolt.

Go smart when you want keyless entry, remote access, or a record of who came and went, for example a holiday let or a place cleaners and trades visit. Smart locks cost more and add a battery or wiring to think about, so choose one because you want the feature, not because it looks modern.

Re-keying is the cheapest way to change who can open a door. A locksmith opens the cylinder, swaps the small pins inside to match a fresh key, and your old keys no longer work. The door furniture you can see doesn't change at all.

It suits two situations in particular. First, after you take over a property and have no idea how many keys are floating around. Second, when you've got a front, back and garage door each on its own key and you'd rather carry one. Several locks of the same brand and type can often be keyed alike so a single key runs the lot.

The limit is condition. Re-keying a tired or damaged lock just gives you a tired lock with a new key. If the mechanism is failing, or the security grade is too low for an entry door, you've reached the point where replacing is the smarter spend.

Most smart locks sold for homes are battery powered. They mount onto your existing door prep, run off replaceable batteries, and don't need a sparky. The trade-off is that you have to change the batteries from time to time, and a flat battery shouldn't leave you stranded, so keep a backup key or mechanical override.

Hardwired smart locks and access-control setups, like the fob or keycard systems on unit blocks, are different. They need 12-volt power run to the door, and that wiring has to be done by a licensed electrician to be safe and compliant. They cost more up front, but there's no battery to worry about, which is why fob and keycard systems are the standard in strata buildings.

So the decision point is simple. Want keyless on a normal house door with the least fuss? A battery smart lock is usually it. Want a wired, always-on system for a building entrance or a serious access-control fit-out? Budget for an electrician as part of the job.

Here's the part that surprises people. Under Queensland's security industry rules, installing, repairing or servicing locks on an existing building is licensed work that needs a security equipment installer licence, the same licence class that covers alarms and access control. Cutting a spare key over the counter doesn't need a licence, and fitting locks while a building is being constructed, repaired or renovated is exempt, but once that work is finished, removing and reinstalling household door locks falls back under the licence requirement. (Sources: Queensland Government; Rechenberg.)

Getting that licence isn't a formality. Applicants are fingerprinted, go through a criminal history check, supply 100 points of ID, can't have a recorded disqualifying conviction in the past 10 years, and the process runs around four to six weeks. That's the point of the rule: the person changing the locks on your home has been checked. (Source: Queensland Government.)

Locks aren't the only trade with a legal line. As a general marker for when a tradie must be licensed in Queensland, a QBCC licence is required once building work tops $3,300 including materials, labour and GST, and some trades, like plumbing, drainage and gas, need a licence at any value. Wet-area waterproofing, for instance, must be done by a QBCC-licensed waterproofer under Australian Standard AS 3740. The takeaway for any property job: check the person doing it holds the right ticket. (Sources: QBCC.)

No Gold Coast-only locksmith price list exists, so treat the following as Australia-wide guidance to sanity-check a quote, not a fixed figure. Your actual price depends on the lock type, how many doors, the hardware grade and whether it's a standard call-out or after hours.

A 2026 trade guide puts re-keying at roughly $80 to $220 per lock, while a budget-end estimate runs nearer $40 to $100; doing a whole home tends to land around $120 to $350 depending on how many locks. Replacing a lock runs a little higher, roughly $120 to $350 per lock in the same 2026 guide. Smart lock installation labour is higher again, with that guide citing around $200 to $600 per lock. (Sources: What's The Damage; Precision Locksmiths; Oneflare; Airtasker.)

Two things move the bill. A standard business-hours call-out is typically quoted around $120 to $300, while after-hours work runs roughly $200 to $500, about 1.5 to 2 times the daytime rate, so a non-urgent lock change is cheaper booked in normal hours. And hardwired smart locks add an electrician's time on top. None of these are our prices; they're the market backdrop. For your door, the only number that counts is a quote on your actual hardware. (Source: What's The Damage.)

A few fundamentals matter more than the brand on the lock. Exterior doors want a deadbolt with a decent throw into the frame, and the strike plate needs long screws driven into the timber stud behind the jamb, not just the thin door casing. A flimsy strike is where a lot of forced entries give way.

Keep a mechanical backup. If you go smart, keep a key or override so a flat battery or a power cut doesn't lock you out. And after anyone has held a key, a cleaner, a previous owner, a former tenant, re-keying is cheap insurance that an unknown copy can't be used.

If you're not sure whether your situation calls for a re-key, a replacement or a smart lock, that's the kind of thing we sort out over one phone call. You ring or message one number, we work out the right fix, dispatch a licensed installer if it's not a job we do ourselves, manage it on site, and send one itemised invoice. Quotes are free and fixed-price, so there's no cost in asking.