1. You Don’t Know Who Has Keys

The previous owner, tenants, real estate agents, contractors, cleaners — any number of people could still have copies of your keys.
Rekeying ensures you’re the only one with access going forward.

2. It’s More Affordable Than Replacing Locks

Rekeying is usually much less expensive than replacing all the lock hardware — because it only involves changing the pins inside the lock to fit a new key.
You keep your existing locks but gain security.

3. Peace of Mind

Even if the previous owner promises no one else has keys, you simply can’t verify it. Rekeying eliminates any doubt and lets you sleep better at night.

4. Match All Your Locks to One Key

If your new home has several locks that use different keys, a locksmith can rekey them all to use a single key — making life easier and more secure.

5. Protect Against “Hidden” Spare Keys

Some people hide spare keys around their property (under mats, in fake rocks, etc.) and forget to remove them. Rekeying makes all old keys useless, even if a hidden spare is found.

 Bonus Tip:

If your locks are old or low-quality, you might also consider upgrading to high-security locks at the same time you rekey — for even more protection.