Rekeying vs. Replacing Your Locks: Which Do You Need (and What It Costs)?

When you want new keys or better security, you have two options: rekey your existing locks or replace them entirely. They are not the same thing, and choosing the right one saves you money. Here is a clear breakdown.

What rekeying means

Rekeying keeps your existing lock hardware and changes the small internal pins inside the cylinder so it works with a brand-new key — and your old keys stop working completely. The lock looks identical; only the key that opens it changes. It is quick, affordable, and done on site.

What replacing means

Replacing removes the entire lock and installs a new one. You do this when you want different or better hardware — a higher security grade, a new finish, or a smart lock — or when the existing lock is damaged or worn out.

When to rekey (most situations)

• You just moved into a home and do not know who has copies.
• You lost a key or had one stolen.
• A roommate, tenant, or employee left.
• You have too many copies floating around.
• You want several locks to open with one key.

In all of these, the hardware is fine — you just need the keys changed, so rekeying is faster and cheaper.

When to replace

• The lock is damaged, sticking, or worn out.
• You want to upgrade security (for example to a Grade 1 deadbolt).
• You are switching to a smart or keypad lock.
• The style or finish no longer matches and you want new hardware.

What each costs on Staten Island

Rekeying is the budget-friendly option — often starting around $29 per lock since it reuses your hardware. Replacement costs more because you are paying for new hardware plus installation, and the price depends on the lock you choose. We always confirm the total up front with a flat $29 service call.

Not sure which you need?

Tell us the situation and we will recommend the cheaper option that actually solves it. Learn more about our lock rekeying service or our lock installation and replacement service.

Frequently Asked Questions

Is it cheaper to rekey or replace a lock?

Rekeying is almost always cheaper. Rekeying reuses your existing hardware and just changes the internal pins so old keys no longer work, often starting around $29 per lock. Replacing means buying new hardware plus installation, so it costs more. Replace only when you want an upgrade or the lock is damaged.

What is the difference between rekeying and replacing?

Rekeying keeps your existing lock but changes its internal pins so it works with a new key and the old keys stop working. Replacing removes the entire lock and installs a brand-new one. Rekeying changes who can open the lock; replacing changes the lock itself.

When should I rekey instead of replace?

Rekey when the lock is in good shape and you simply want new keys to work — for example after moving into a home, losing a key, a roommate or employee leaving, or when you want several locks to share one key. It is faster and cheaper than replacing.

Can I make all my locks use the same key?

Yes. As long as the locks are the same brand and keyway, a locksmith can rekey them so a single key opens all of them. It is one of the most popular reasons people rekey, and we do it routinely across Staten Island.

Related Rescue Locksmith Services in Staten Island

Need a locksmith now? Rescue Locksmith provides 24/7 emergency lockout service, car key replacement and fob programming, and commercial locksmith services for businesses across Staten Island. Call (347) 472-5008 for fast, licensed, insured help.