A broken door lock — one that will not lock, unlock, or latch properly — compromises your home security and needs prompt attention. Common issues include a lock that turns but does not engage, a latch that will not retract, a handle that is loose or drooping, or a deadbolt that will not throw. A mobile locksmith can diagnose the fault and repair or replace the lock on the spot, typically carrying a range of replacement locks in their van.
What to do right now
- 1
Identify the specific problem
Determine exactly what is failing: Does the key turn but the bolt not move? Does the handle droop or feel loose? Does the latch not spring back? Does the deadbolt only partially extend? Understanding the symptom helps the locksmith prepare the right parts.
- 2
Secure the door temporarily
If the lock will not engage, use a chain lock, slide bolt, or door wedge from inside. If you are going out, prop a chair under the handle or ask a neighbour to watch the property until the locksmith arrives.
- 3
Do not force the broken lock
Forcing a broken lock with excessive pressure, tools, or repeated slamming can damage the door, the frame, or both — significantly increasing the repair cost. If the lock is not working, stop using it and call a professional.
- 4
Call an emergency locksmith
A locksmith will diagnose whether the lock can be repaired or needs full replacement. They carry common lock brands and types in their van for immediate fitting. Ask about upgrading to a more secure lock while they are there.
When to call an emergency locksmith
- ⚠️The lock will not lock or unlock with the key
- ⚠️The door handle is loose, drooping, or has fallen off
- ⚠️The latch does not spring back and the door will not stay closed
- ⚠️The deadbolt only partially extends or will not retract
- ⚠️The lock makes grinding or clicking noises when operated
- ⚠️You cannot secure your home because the lock has failed
How much does it cost?
Repairing a broken door lock costs $80–$170 during business hours if the lock can be fixed without replacement (e.g., realignment, spring repair, lubrication). Full lock replacement costs $150–$400 depending on the lock type and quality. A basic knob lock costs $80–$150 to supply and fit. A quality deadbolt costs $150–$300 to supply and fit. After-hours repairs add $50–$120 to the total. Always get a quote before work starts.