Why You Should Change Your Locks After Moving Into a New House

You Don't Know Who Has a Key

The single biggest reason: a previous owner, tenant, real estate agent, contractor, or house-sitter may still have a working copy of your front door key. You have no way to know how many copies exist or where they've gone.

• This applies even to brand-new construction - builders, subcontractors, and inspectors often hold keys during the build
• The risk isn't hypothetical: it's the most common reason locksmiths get called right after a move

Rekey or Replace - Which Do You Need?

Two options solve the same problem differently:

• Rekey ($20-$40/lock, $150-$300 whole-house): keeps your existing hardware, just changes the internal pins so old keys stop working. Fastest and cheapest option if your current locks are in good condition.
• Replace ($80-$200/lock): worth it if the hardware is worn, you're upgrading to Grade 1 security, or adding a smart lock. See our rekey vs. replace guide for the complete breakdown.

It's a Good Time to Upgrade, Not Just Reset

Since a locksmith is already at your door, moving day is a natural point to fix any pre-existing weak spots:

• Swap builder-grade Grade 3 hardware for Grade 1 deadbolts
• Add a smart lock if you want keyless entry or remote access
• Reinforce the door frame strike plate - often the actual weak point, not the lock itself

Peace of Mind, Not Just Security

Beyond the practical risk, there's a simple psychological benefit: knowing every key to your home is one you personally control, cut by a locksmith you verified, removes a low-grade worry that otherwise lingers for months.

Frequently Asked Questions