Rekeying vs. Changing Locks: Which Do You Need?

This is the most common question I get as a locksmith: "Should I rekey my locks or replace them?" The answer depends on your situation, and choosing wrong can cost you unnecessary money.

What's the Difference?

Rekeying

We change the internal pins inside your lock cylinder so that old keys no longer work and you get new keys. The lock body, handle, and hardware stay the same. Think of it like changing the combination on a safe.

Lock Replacement

We remove the entire lock and install a brand new one with new keys. Everything is new — the lock body, cylinder, and hardware.

When to Rekey (Save Money)

• You just moved into a new home and want fresh keys
• You lost your keys and want to eliminate the risk
• A tenant moved out and you need new keys
• You want all your locks to use the same key
• Your locks are in good physical condition
• After a relationship change or roommate leaving

Cost: $20–$40 per lock

When to Replace (Upgrade Security)

• Your locks are old, worn, or damaged
• You have low-security Grade 3 locks and want better
• You want to upgrade to smart locks
• After a break-in where locks were forced
• Your locks don't have a deadbolt (only a knob lock)
• You want high-security locks with restricted keys

Cost: $80–$200+ per lock

The Bottom Line

If your locks are in good shape and you just need new keys → rekey. If your locks are old, damaged, or low-security → replace. A good locksmith will always recommend the option that saves you money while keeping you secure. We'll never push a lock replacement when rekeying will do the job.

Need Help Deciding?

Call Iron Key Security Locks at 416-624-8013. We'll assess your locks and give you honest advice — plus upfront pricing for whichever option you choose. Serving the entire GTA: Toronto, Mississauga, Scarborough, North York, Etobicoke, Brampton, Markham, Vaughan, and beyond.