Choosing a lock for your front door sounds straightforward until you're standing in the hardware aisle looking at twenty different options with no real way to tell which ones are worth buying and which ones will fail when it actually matters. The front door is the primary entry point to your home, and the lock on it is your first line of defence. Getting that choice right is worth more than most people realise.

This guide walks through what to look for when choosing a front door lock, the different types available, what the grades and ratings actually mean, and when it makes sense to call a locksmith rather than going it alone.

Why Your Front Door Lock Matters More Than You Think

Most residential break-ins in Australia don't involve sophisticated techniques. Opportunistic entry — a door forced open, a lock picked because it's cheap, or a cylinder drilled through because it has no hardened steel insert — accounts for the overwhelming majority of home intrusions. The quality of your front door lock is often the deciding factor between a burglar moving on and one getting through.

The other thing most homeowners don't consider is that the lock on a front door is used multiple times a day, every day, for years. A lock that isn't built for that kind of wear starts to develop mechanical problems — stiffness, inconsistency, sluggish operation — that don't just become annoying but become a security risk over time. A failing lock is an exploitable lock.

Understanding Lock Types: What's Actually on the Market

Deadbolts

A deadbolt is the most common and most recommended lock for residential front doors. Unlike a spring latch, which can be slipped with a card or thin tool, a deadbolt extends a solid steel bolt into the door frame that cannot be retracted without the correct key or interior turn. Single-cylinder deadbolts are operated by key from the outside and thumb turn from the inside. Double-cylinder deadbolts require a key on both sides, which adds security but creates a safety concern in emergencies — worth thinking through carefully before choosing this type.

Knob and lever locks

Knob and lever handle locks are common on interior doors and lightweight exterior doors, but they're not appropriate as the sole lock on a front door. The cylinder mechanism sits inside the knob, which means the knob can be physically removed or broken off to access the mechanism directly. If your front door has only a knob or lever lock, adding a deadbolt above it should be a priority.

Deadlatch locks

A deadlatch — sometimes called a slam lock — combines elements of a spring latch and a deadbolt. The latch automatically engages when the door closes, but the small plunger beside the latch bolt deadlocks it when pressed against the striker plate, preventing it from being pushed back. These are common in Australian homes and offer reasonable security for everyday use, but most locksmiths will recommend pairing one with a deadbolt for a front entry door.

Mortise locks

Mortise locks are installed within a pocket cut into the door itself rather than surface-mounted. They're more robust than most rim-mounted locks and offer more locking points, which is why they're common in older Melbourne homes and period properties. They require more involved installation and replacement, but the added security and durability make them worth considering for a quality front door setup.

Smart locks and electronic locks

Keypad, Bluetooth, and app-controlled locks are becoming increasingly common in Melbourne homes. They offer genuine convenience — keyless entry, the ability to grant temporary access, and audit trails of who's entered and when. The security consideration is that many smart locks are overlay systems that sit over an existing cylinder, which means the underlying lock quality still matters. An electronic lock with a low-grade cylinder beneath it is only as strong as that cylinder.

What Lock Grades and Ratings Tell You

Not all locks carry graded ratings, but where they exist, they're one of the most reliable indicators of quality. In Australia, look for locks that meet or exceed Australian Standard AS 4145, which covers mechanical lock sets and sets requirements for resistance to attack, key security, and operational durability.

Within that standard, locks are rated by grade — Grade 1 being the highest for residential use. A Grade 1-rated lock has been tested against forced entry, drilling, picking, and cylinder attack to a standard that budget locks simply don't meet.

When you're comparing locks and the price difference between two options seems significant, the rating is almost always the explanation. A lock rated to AS 4145 Grade 1 and priced accordingly reflects the engineering and materials required to meet that standard. A cheap alternative that looks similar from the outside hasn't been put through the same testing.

The Cylinder Is Where Most Locks Succeed or Fail

The lock cylinder — the part the key goes into — is the component that gets attacked most often, and it's where the difference between a quality lock and a poor one is most apparent. A cylinder without hardened steel anti-drill pins can be defeated with a basic drill in under a minute. A cylinder without anti-pick security pins is vulnerable to picking with widely available tools. A cylinder without anti-bump protection can be opened in seconds with a bump key.

When evaluating any lock for a front door, check what security features the cylinder includes. Hardened steel anti-drill pins, security pins for pick resistance, and a reinforced face plate are all features worth prioritising. Euro cylinders — the oval-shaped cylinders common on many modern locks — should also have anti-snap protection, as cylinder snapping is a known method of attack that bypasses the lock body entirely.

If you're unsure what's currently in your front door or whether your existing cylinder offers these protections, a licensed locksmith can assess it quickly during a service call and advise honestly on whether an upgrade is warranted.

Getting the Installation Right

The best lock in the world is compromised by a poor installation. A few things that matter beyond the lock itself:

The strike plate and fixing screws

The strike plate — the metal plate on the door frame that the bolt engages with — is often the weakest point in an otherwise solid door lock setup. A standard strike plate held in by short screws offers very little resistance to a forced entry kick. Upgrading to a heavy-duty strike plate fixed with 75mm or longer screws that reach the structural timber behind the frame makes a significant difference to how much force the door can resist.

Door and frame condition

A quality lock installed on a warped, damaged, or hollow-core door is only as strong as the door itself. If the door flexes when you push on it, or the frame around the lock area has existing damage, those issues need to be addressed alongside or before a lock upgrade.

Correct backset and sizing

Locks are manufactured to specific backset measurements — the distance from the edge of the door to the centre of the cylinder. Getting this wrong means the lock won't fit properly, the bolt won't engage cleanly with the strike plate, and the lock will wear faster. A locksmith will measure this before recommending or fitting a replacement, which is one of the practical reasons to use a professional for installation rather than attempting it without experience.

Rekeying vs. Replacing When You Move In

If you've recently moved into a property in Melbourne, the question isn't just what lock to choose — it's whether the existing lock needs to be changed at all. Previous owners, real estate agents, tradespeople, and anyone else who held a key during the sale or tenancy period may still have copies. Rekeying the existing lock changes the internal pin configuration so that old keys no longer work while keeping the lock hardware in place. It's a cost-effective way to restore key security without replacing the entire lock, provided the lock itself is in good condition and meets an adequate security standard.

If the lock is worn, cheap, or doesn't meet a reasonable security grade, a full replacement is the better outcome. True Locksmith provides both rekeying and lock change services across Melbourne's Bayside and Southeast suburbs, and can advise which option makes sense for the specific lock currently on your door.

When to Call a Locksmith



Choosing a lock involves more variables than most hardware store staff are equipped to advise on — door type, frame condition, cylinder grade, existing hardware compatibility, and local security considerations all affect the right answer for your specific situation. A licensed locksmith can assess what you have, explain what it offers, and recommend a replacement that suits your door and your budget without overselling hardware you don't need.

True Locksmith works with homeowners across Brighton, Hampton, Sandringham, Cheltenham, Moorabbin, Bentleigh, Beaumaris, Elwood, Heatherton, Highett, Parkdale, Mordialloc, McKinnon, Mentone, and surrounding suburbs. Whether you need a lock assessment, a full change locks service, or advice on upgrading an existing setup, our team attends residential jobs across Bayside and Southeast Melbourne and can provide an honest appraisal on the spot.

To speak with a licensed locksmith about your front door lock, call 0421-767-767. For more on our lock change and rekeying services, visit our Change Locks and Re-Key Locks pages.