Rekeying cost depends mainly on how many locks need new keying, not how many doors you have — a front door with a deadbolt and knob counts as two. Standard pin-tumbler locks are the most economical; high-security cylinders cost more.
Rekeying keeps the existing lock bodies in place and changes only the internal keying. You can also ask to have the rekeyed doors keyed alike.
Rekey or replace?
Rekey when the hardware is in good shape and you want old keys to stop working — new home, tenant change, lost keys. Replace when locks are worn, damaged or outdated. Contact HSI Locksmith with your lock count for service information.