Search “best smart lock” and you’ll get a dozen lists recommending deadbolts built for American doors — a bored cylinder hole, a specific backset measurement, sometimes a full lock replacement. Install one of those in a typical Australian rental with a nightlatch or mortice lock, and it either won’t fit at all, or it’ll mean drilling into a door you don’t own. Neither is what a renter actually needs.
This isn’t a top-10 list of whatever’s popular on Amazon. It’s organized around the one thing that actually matters for renters and Airbnb hosts here: does it require permanently modifying the door, or not.
The Real Divide: Retrofit vs. Replacement
Retrofit locks clip or clamp over your existing lock’s thumbturn — the little lever you twist by hand to lock the door. A small motor turns it for you. Nothing about the original lock changes. You can remove it in under a minute and the door goes back to exactly how it was.
Replacement locks (most of the big-name “smart deadbolts”) physically swap out your existing lock hardware for a new unit — which in Australia usually means drilling a new bore hole, because our doors aren’t pre-cut for the US-style deadbolts most of these products are designed around.
For a renter, that difference is the whole decision.
Smart Locks That Actually Work Without Modifying the Door
Nuki Smart Lock — the one genuinely renter-friendly option with confirmed Australian availability and support. It fits over your existing lock’s interior thumbturn (not the cylinder itself), so there’s no drilling and no change to the lock mechanism a landlord would ever notice. Installation is a few minutes with no tools beyond what’s in the box. It runs on four AA batteries rather than a rechargeable pack — worth knowing, since replacement cost adds up over time. Sold directly through Nuki and via Amazon Australia; the lock on its own runs around $199, with the bridge (needed for remote/app control away from home) pushing a bundle closer to $549.
SwitchBot Lock is the other well-known retrofit option internationally, using the same clip-over-the-thumbturn approach. Availability and pricing through Australian resellers is inconsistent enough that we’d recommend checking current stock and AU warranty coverage directly before buying, rather than relying on overseas pricing.
What to Skip If You’re Renting
Based on actual Australian retailer listings, these require a genuine lock swap — not a drop-in option for a renter:
- Schlage Encode — a US-style bored deadbolt; Australian sellers themselves note it’s “not a drop-in swap” for a typical nightlatch or mortice setup
- Lockly Secure Pro Zeno — requires a bored opening matched to the unit’s specs
- Aqara Smart Lock U100 — needs a 54mm door hole, which means drilling
- Yale ByYou Pro — a mortice lock replacement; the lock body sits inside the door edge, a real installation job, not a weekend swap
- Lockwood 001 Touch Plus — ASSA ABLOY’s own documentation says it needs “additional fixing holes and modifications to the door frame”
Any of these might make sense if you own the property. For a rental, they’re the wrong category entirely.
Do You Need Landlord Permission for a Retrofit Lock?
This genuinely depends on your state, and it’s worth treating carefully — lock changes sit in a slightly different category from other minor modifications (see our full state-by-state breakdown of modification rights).
In Western Australia specifically, tenants generally need written landlord consent to alter the premises, including locks — with narrow safety exceptions (an immediate threat after a break-in, or a landlord failing to fix a reported security defect urgently). Where a lock change is allowed, tenants are expected to give the landlord a copy of any new key as soon as reasonably possible. Other states have their own versions of this rule.
A retrofit lock like Nuki is a genuinely strong argument in your favour here: you’re not changing the physical lock at all, only adding a device that turns the existing thumbturn — the landlord’s original key still works exactly as before, and nothing about the lock itself is altered. That said, “clearly not a modification” and “definitely won’t need to mention it” aren’t the same thing — a quick written heads-up to your property manager costs nothing and avoids any ambiguity later.
For Airbnb Hosts: The Detail Most Guides Miss
If you’re setting up self check-in for an Airbnb in Australia, know this before you buy: Airbnb’s built-in smart lock integration — the feature that automatically generates a unique code for each guest, active only during their stay — is currently limited to listings in the US and Canada. It isn’t available for Australian listings.
That doesn’t mean a smart lock is useless for an AU host — it just means you’re managing codes through the lock’s own app (Nuki’s app lets you create and schedule time-limited codes or digital keys directly) rather than through Airbnb automatically syncing it for you. A few practical adjustments that follow from this:
- Set codes manually before each guest’s check-in window, and deactivate or change them after checkout — it’s an extra step, not a dealbreaker, but budget the time
- Always list a backup entry method in your check-in instructions (a lockbox with a physical key is still the simplest fallback) — this is Airbnb’s own advice even for hosts who do have the native integration, and it matters more without it
- Property management tools like Hostfully or similar platforms can sometimes bridge this gap with their own code automation — worth checking if you’re managing more than one listing
A Quick Checklist Before Buying
- Confirm your current lock type (nightlatch, mortice, or deadlatch) — most retrofit locks are designed around a standard thumbturn, so check compatibility before ordering
- Check your state’s rules on landlord consent for lock changes, even for a retrofit device
- If renting, send a quick written note to your property manager before installing anything — costs nothing, prevents disputes
- For Airbnb hosts: plan your code-management process manually, since Airbnb’s auto-code feature isn’t available for AU listings yet
- Keep the original lock hardware — retrofit devices are removable, and you’ll want everything back to original condition at move-out
The Bottom Line
Most smart lock recommendations online are written for a market where doors are drilled for a deadbolt by default — that’s not the Australian rental reality. If you’re renting or hosting here, a retrofit device like Nuki that works with your existing lock is the only category that avoids the drilling, the landlord conversation, and the move-out headache altogether. Everything else on the popular “best of” lists is built for homeowners, not renters.
Prices and product availability were checked in October 2026 and may have changed — always confirm current pricing and Australian warranty coverage directly with the retailer before buying. This article isn’t sponsored by any lock manufacturer. This is general information, not legal advice — always confirm modification and consent rules with your relevant state tenancy regulator.