How much does it cost to change locks?
Changing locks often costs $150 - $500 per lock when new hardware and labor are included. Basic replacement is cheaper; high-security, smart, keypad, mortise, or misaligned exterior-door work costs more.
Do not replace locks just because old keys exist. If the hardware works well, rekeying usually solves that problem for less.
What changes lock replacement cost
Basic knob or deadbolt replacement
$150 - $250 per lockHow to tellSame type of hardware, existing holes line up, door is square
The fixRemove old hardware and install new hardware in existing prep
Exterior door hardware set
$250 - $500+How to tellHandleset, deadbolt, trim, latch, and strike need fit and alignment
The fixInstall hardware, align latch/deadbolt, adjust strike plates
Smart or keypad lock
$200 - $600+ with hardwareHow to tellBattery, keypad, app, Wi-Fi bridge, or auto-lock features
The fixInstall hardware, align deadbolt, set access codes, test app if included
Door or frame problem
Adds labor or carpentryHow to tellDoor rubs, deadbolt will not throw, frame is loose, or strike plate is wrong
The fixDoor adjustment, strike reinforcement, or frame repair before hardware works correctly
Before replacing locks
- Ask if rekeying the current locks would solve the security issue.
- Check whether the door closes cleanly. A new lock will not fix a sagging door by itself.
- Choose hardware grade and finish before the appointment so the locksmith can price parts accurately.
- Ask whether strike plate reinforcement and longer screws are included for exterior doors.
Unlock the hiring checklist
Use this before you call a locksmith, so you know what to ask and what to avoid.
Call a pro when…
- Existing hardware is worn, damaged, loose, or low security
- A deadbolt will not line up or throw fully
- You want keypad or smart access installed correctly
- A rental, turnover, or security event requires fast access control
Rekey or change locks?
Rekey when the existing lock is good and you only need a new key. Change the lock when the hardware is damaged, ugly, unreliable, insecure, incompatible, or missing features you need. For exterior doors, the door/frame alignment matters as much as the lock itself.
Need a cleaner scope before you call around?
Use the locksmith checklist to compare the same work, questions, cleanup, and warranty before choosing a local company.
Related questions
Is changing locks better than rekeying?
Only when the hardware itself needs improvement. If the lock works and the goal is old-key control, rekeying is usually enough.
Can I change locks myself?
Many standard knob and deadbolt swaps are DIY if the holes line up and the door is square. Use a pro for smart locks, exterior security hardware, stuck doors, or anything that requires drilling.
Why does a new lock still not latch?
The door may be sagging, the frame may have shifted, or the strike plate may be misaligned. Hardware replacement does not solve every door-fit problem.
Should I replace all locks after moving?
Not always. Rekey all working exterior locks first; replace only weak, worn, incompatible, or missing hardware.