Types of Door Locks: A Complete Guide

Choosing the right door lock is one of the most practical things you can do to protect your home. Australia has a wide range of lock types available, from basic knob locks to app-controlled smart locks, and the price difference between installation options is significant. Understanding what each lock does, and what it costs to have a locksmith fit or change it, helps you make an informed decision without overspending.

To give you a clear baseline, here is a cost comparison of common locksmith services related to door locks in Australia in 2026:

Emergency callouts consistently cost two to three times the standard rate. Reddit reports from Australian homeowners include a $550 charge for an after-hours lockout in Parramatta and a $522.50 bill for a job under 30 minutes. Getting work done during business hours saves considerably.

Deadbolts and Deadlocks

A deadbolt is the most recommended lock type for external doors in Australia. Police and home security advisors consistently favour deadbolts because they cannot be forced back with a credit card or basic tool, unlike spring latches. Single-cylinder deadbolts use a key outside and a thumb-turn inside. Double-cylinder models require a key on both sides, which improves security but creates a fire egress risk.

Look for deadbolts rated to Australian Standard AS 4145.2, which sets minimum pick, drill, and forced-entry resistance requirements. Brands like Lockwood, Abloy, and Kaba produce AS-rated deadbolts widely available through Australian locksmiths and hardware stores.

Mortice Locks

A mortice lock is fitted inside a pocket (the mortice) cut into the door edge. This makes the lock body much harder to attack because it is concealed within the door itself. Mortice locks are common on older Australian homes and timber doors. A quality five-lever mortice lock, such as those in the Lockwood 3582 or ERA Fortress range, offers strong resistance to picking and forcing.

Installation requires precise chiselling and drilling. A professional locksmith typically charges $150 to $300 to install a mortice lock during standard hours.

Euro Cylinder Locks

Euro profile cylinders are the barrel-shaped inserts found in many European-style doors and some Australian aluminium door systems. The cylinder can be replaced without changing the whole lock body, making rekeying and upgrades straightforward. However, standard euro cylinders are vulnerable to snap attacks, where the cylinder is snapped in two with a specific tool. Upgrade to anti-snap cylinders such as the Mul-T-Lock MT5+ or ASSA Abloy Protec2 if your door uses this format.

Night Latches and Rim Locks

A night latch, sometimes called a rim lock, sits on the surface of the door rather than inside it. The classic Yale-style latch is the most familiar example. These are generally used as a secondary lock rather than a primary security measure, as they offer limited forced-entry resistance on their own. Paired with a deadbolt, they are a practical combination for front doors.

Lever Handle and Knob Locks

Lever handle sets and knob locks are common on internal doors and some external entry doors. They include a latch mechanism operated by the handle, often combined with a privacy pin or key cylinder. Knob locks on external doors are not recommended as a sole security measure. The knob itself can be snapped off or gripped with pliers to defeat the lock. Use them as a secondary function combined with a proper deadbolt on any external door.

Smart Locks and Digital Locks

Smart locks replace or overlay traditional cylinder locks and allow entry via PIN code, fingerprint, Bluetooth, or smartphone app. Popular models in Australia include the Schlage Encode, Yale Assure, and Lockwood 001 series. Some retrofit over existing deadbolts; others require a full replacement.

Supply and installation of a digital lock typically costs $150 to $350 during standard hours. Battery life is an important consideration. Most quality smart locks run six to twelve months on AA batteries, and they should alert you before the battery dies. Always check that the lock has a mechanical key override in case of power failure or connectivity issues.

All-in-One Entrance Sets

An entrance set combines a latch, deadbolt, and handle into a single integrated unit. These are common on new Australian homes and provide a tidy, coordinated look. Brands like Gainsborough, Lockwood, and Cowdroy supply entrance sets that meet AS 4145 requirements. The security rating varies significantly between budget and premium models, so check the product specification before purchasing.

For most Australian homes, the best approach is a layered one. A deadbolt rated to AS 4145.2, combined with a solid strike plate using 75mm or longer screws into the door frame stud, gives you a strong baseline. If your door uses a euro cylinder, upgrade to an anti-snap cylinder. If you have a mortice lock on an older home, check the lever count. A five-lever mortice lock provides substantially better security than a two or three-lever version.

Smart locks add convenience and can improve security through audit trails and temporary access codes, but they do not replace physical security. A smart lock on a flimsy door or without a deadbolt-grade latch provides little real-world protection.

Police across Australian states generally recommend deadbolts on all external entry points, security screen doors with a separate lock, and key-operated window locks. The Victorian Police and NSW Police both publish home security checklists that align with this advice.

With over 700 licensed locksmith businesses operating across Australia, finding qualified help is straightforward in most metro areas. Melbourne has the highest concentration with 216 listings, followed by Sydney with 179. In regional areas, 82% of businesses offer 24/7 emergency service, though emergency rates apply outside standard hours.

Highly rated businesses like Tas Mobile Locksmith (5.0 stars, 1591 reviews) and Express Locksmith Gold Coast and Tweed (5.0 stars, 1375 reviews) demonstrate the quality available across the country. Terry's Locksmiths and Sheehan Locksmiths both carry near-perfect ratings with thousands of reviews, which gives a reliable signal of consistent service.

When getting a quote, ask specifically for the supply and labour cost broken down separately. This lets you compare the lock brand being supplied and ensure you are not paying inflated prices for a budget product. Also confirm the locksmith holds a current licence for your state, as licensing requirements differ between New South Wales, Victoria, Queensland, and other states.