When it comes to home or business security, replacing a door lock is often a necessary and practical step. Whether you’ve moved into a new place, lost a set of keys, or experienced a break-in, changing your locks is one of the simplest ways to improve safety and gain peace of mind. But how much does it actually cost to replace a door lock?
Factors Affecting the Cost of Lock Replacement
The cost of replacing a door lock can vary depending on several key factors. These include:
- Type of lock: Deadbolts, knob locks, digital locks, and smart locks all come with different price tags.
- Brand and quality: Higher-end brands or heavy-duty security locks naturally cost more.
- Labour and call-out fees: The service fee from a qualified locksmith can vary depending on the time of day or urgency.
- Installation complexity: Replacing a standard lock is generally cheaper than reconfiguring a smart locking system or dealing with older doors.
Understanding these variables helps give a more realistic picture of what to expect when budgeting for locksmith services in Adelaide or other parts of the country.

Typical Price Ranges
On average, replacing a basic door lock can cost anywhere between $80 to $250, including the hardware and installation. If you choose to upgrade to a high-security lock or smart lock, costs can easily rise to $300 to $500 or more.
Keep in mind that these prices generally reflect daytime, non-emergency services. If you require assistance after hours, during a public holiday, or in urgent situations, you may be looking at additional fees of $50 to $150 depending on the locksmith and your location.
Should You Rekey or Replace?
Not all situations require a full lock replacement. If your existing hardware is still in good condition, a locksmith may recommend rekeying instead. This process changes the internal pins of the lock so that old keys no longer work. It’s more affordable—typically costing $40 to $100 per lock—and just as effective in maintaining security when keys are lost or stolen.
For example, many people searching for a lost keys locksmith service might only need to have their locks rekeyed, especially if there are no signs of tampering or forced entry.
When Replacement is the Better Option
Rekeying is not always suitable. Lock replacement is recommended when:
- The lock is damaged or worn out.
- You’re upgrading to a higher-security option.
- The current lock is outdated or incompatible with modern systems.
- Keys have been copied by previous tenants or staff.
Choosing to replace your lock is an investment in long-term protection and peace of mind.
Importance of Hiring a Professional
DIY lock replacement might seem tempting, but it often leads to misalignment, poor fitting, or compromised security. A licensed locksmith ensures proper installation, compatibility, and compliance with safety standards.
Professional locksmith services in Adelaide not only replace locks efficiently but also offer valuable advice on securing your property based on its layout, access points, and vulnerabilities.
Final Thoughts
The cost to replace a door lock can vary, but the value it brings in terms of security is well worth it. Whether you’re responding to a break-in, updating old hardware, or dealing with a lost key, there’s a solution to fit every budget and need.
Need expert help with your locks? Contact Emergency Locksmith Adelaide today for prompt and reliable assistance.