Lock Replacement Services in Sydney

Emergency Lock Replacement in Sydney 24/7
We provide 24/7 emergency locksmith services across Sydney and the surrounding areas, ensuring help is always available when you need it most. Our locksmiths are ready around the clock to handle urgent lock replacements, simply call 0482095238 for immediate assistance.
Break-ins can leave your locks damaged and your property exposed, requiring prompt replacement to restore security. Broken keys stuck inside locks, lost or stolen keys, and damaged locks all pose risks to your safety. In these situations, swift lock replacement is essential to protect your home or business.




In emergencies, we prioritise reaching you as quickly as possible. Our fully equipped mobile service allows us to replace your locks on the spot, day or night, with no call-out fee. Our locksmiths work efficiently to secure your property with new, reliable locks.
Damaged locks can put your property’s security at risk and require immediate attention. Faulty mechanisms might leave you locked out of your home or business, while signs of tampering indicate the need for urgent replacement. Additionally, old locks that suddenly fail should be replaced promptly to ensure your safety.
What Types of Door Lock Do We Provide Replacement Services in Sydney?
Selecting the right lock replacement is key to maintaining your property’s security. Each type of lock provides unique features designed to suit different security requirements. Here are the locks we commonly replace across Sydney:
- Deadbolt Locks: Single-cylinder and double-cylinder deadbolts require consistent maintenance to ensure reliable performance. The bolt should move effortlessly in and out to secure your door properly. We carefully align the strike plate with the door frame for optimal functionality. As deadbolts often serve as the primary security lock, our locksmiths ensure they remain in top working condition.
- Smart Locks: Smart locks rely on a combination of mechanical and electronic components, making regular maintenance essential for smooth and reliable operation. Our locksmiths ensure batteries and power connections are in top condition to prevent unexpected lockouts. We clean and lubricate the mechanical parts, just as we would with traditional locks, to keep everything working seamlessly. In addition, we update settings and test all smart features to ensure your lock remains secure and fully functional.
- Mechanical Keypad Locks: Mechanical keypad locks blend button-based access with internal mechanisms, requiring proper care to maintain performance. Our locksmiths clean the keypad to ensure the buttons function reliably and lubricate the internal components for smooth operation. We also check the battery life and test the backup key system, giving you confidence in your lock's functionality and security.
- Mortise Locks: Mortise locks are intricate systems with multiple moving parts embedded within your door. Our locksmiths carefully maintain the lock body, handles, and internal components to ensure smooth operation. We apply precise lubrication for balanced functionality and check that both the latch and deadbolt align perfectly with the strike plate for secure and reliable performance.
- Master Key Systems: Master key systems require meticulous care to ensure all access levels function seamlessly. Our locksmiths maintain the intricate pins and springs that make these systems effective, carefully checking each lock to guarantee consistent operation. Detailed maintenance records are kept to monitor the system’s performance and ensure its long-term reliability.
- Knob and Lever Locks: Knobs and levers endure constant daily use, making regular maintenance essential. Our locksmiths inspect the springs to ensure smooth and proper return to position. Internal components are cleaned and lubricated to maintain functionality. We also check that the latch operates freely and securely engages for reliable performance.
Residential Lock Replacement in Sydney
Residential lock replacement enhances your home's security with reliable, high-quality locks tailored to your needs. Old or damaged locks can compromise your family’s safety, which is why our locksmiths carefully remove the existing locks and install new ones that match your home’s style and provide optimal protection.
For front doors, we recommend strong deadbolts to ensure maximum security. Back and side doors are best fitted with durable knob or lever locks, while sliding doors require specialised locks designed for their unique structure. Internal doors, such as those in bedrooms and bathrooms, often benefit from simple privacy locks. For garages and gates, weather-resistant locks are essential to withstand outdoor conditions and provide long-lasting security.
We offer a variety of lock options for your home, including:
- Strong deadbolts for exterior doors
- Simple knob locks for interior rooms
- Mechanical keypad locks for keyless entry
- Smart locks that connect to your phone
- Gate and garage locks that resist weather




Commercial Lock Replacement in Sydney
Commercial lock replacement addresses the specific security demands of your business. With locks enduring frequent use by staff and customers, we install durable, high-performance options designed to handle daily wear while maintaining reliable security.
Front entrances are best secured with heavy-duty deadbolts or mortise locks for robust protection. Back doors and storage areas require strong security locks to safeguard valuable inventory. Internal offices benefit from master key systems that allow controlled access, while staff areas need reliable lever handles for convenient and efficient entry. Emergency exits are fitted with specialised locks that comply with safety regulations, ensuring secure and accessible escape routes.
We offer a range of lock options for businesses, including:
- Master key systems for controlled access
- High-security deadbolts for main entries
- Mortise locks for heavy-use doors
- Mechanical keypad locks for secure areas
- Panic bars for emergency exits


Welcome to
Lost Key Locksmiths
Lost Key Locksmiths are Sydney's trusted experts in all types of locksmith services. Our locksmiths are ready to help you with any lock or key issue, big or small - all with our $0 call out fee.