Rekeying vs. Changing Locks: Which One Do You Need?

By Locksmith.contact · Published 2022-06-08 · Updated 2026-09-19

Rekeying changes which key operates a compatible lock while retaining the lock hardware. Replacement changes the hardware itself. Ask about rekeying when the concern is an old or missing key; ask for an inspection when the lock or door is damaged, unreliable or unsuitable for your needs.

What can stay when a lock is rekeyed?

For compatible locks, the locking hardware remains while its key configuration changes. The method depends on the product. For example, Kwikset's rekeying support distinguishes its SmartKey procedure and compatibility requirements. Follow the instructions for your exact product rather than a generic procedure.

When to ask about rekeying

• You have taken possession of a home and do not know who retains keys.
• A key was lost or was not returned by an authorized former user.
• You want compatible locks evaluated for operation with one key.

Confirm that you have authority to change access. A tenancy or shared-occupancy dispute needs a separate legal check; see the Florida rental guide.

When replacement may be appropriate

Ask about replacement for a damaged cylinder, worn mechanism, incompatible key system or a deliberate change to electronic access. A sticking lock can also involve door alignment, so describe the symptom instead of assuming new hardware is the only answer. Compare actual products and installation requirements using our smart lock and mechanical lock checklist.

Compare itemized options

Have the provider count the cylinders and quote rekeying and replacement separately where both are suitable. Include the visit, labor, new keys, hardware and any door work. Do not compare a per-cylinder figure with a whole-visit quote. Ask for the reason if a provider recommends replacing functional hardware, then decide based on condition, compatibility and the written total.

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