You've just moved into a new home, but you have no idea who has copies of your keys—the previous owners, real estate agents, contractors, or anyone else who passed through during showings. Rekeying your locks is one of the smartest security moves you can make as a new homeowner and costs far less than replacing entire lock systems. This guide walks you through why, when, and how to get your residential locks rekeyed.
Why Rekeying Matters After Moving In
A rekey changes the internal pins inside your existing lock cylinders so old keys stop working, but you keep the same hardware. Unlike a full lock replacement, you don't lose your original fixtures—just the security risk of unknown key holders.
Think of it this way: you wouldn't wear a padlock someone else had the combination to. The same logic applies to your home. Previous owners might have given spare keys to family members, friends, or service providers who never returned them. Real estate agents often hold onto keys longer than you'd expect. Contractors working on the property during inspections or pre-sale repairs could have duplicates floating around.
Rekeying eliminates that uncertainty in one afternoon for $75–$150 per lock, typically.
When to Rekey vs. Replace
Rekey if:
- Your existing locks are in good condition and function smoothly
- The hardware matches your home's aesthetic
- You want to save money and time
- You only need to change who can open the doors
Replace if:
- Locks are damaged, rusted, or difficult to operate
- You're upgrading security (moving to smart locks or high-security cylinders)
- Hardware is severely outdated or compromised
- You're changing the style for aesthetic reasons
Most new homeowners fall into the rekey category. Replacement runs $150–$400 per lock and requires more time, making it overkill for a simple security refresh.
Which Locks to Rekey
Start with entry points first:
- Front door
- Back door
- Garage entry door
- Side yard gates (if lockable)
Then decide on interior locks:
- Master bedroom
- Home office
- Bedroom locks on rental properties
Many homeowners rekey only exterior doors initially, then assess interior needs based on privacy concerns and household setup. Rekeying every single lock in a 4-bedroom house can run $400–$600, while just the three main entry doors costs $225–$450.
Finding and Hiring a Residential Locksmith
What to look for:
- Licensed and insured (verify via your state's licensing board)
- Local business with visible reviews on Google and Yelp
- Transparent pricing without hidden fees
- Availability within 1–2 weeks (rekeying doesn't require emergency pricing)
- Willingness to explain the rekey process and timeline
Ask for a quote over the phone that specifies the number of locks and whether they'll rekey to match one master key (helpful for rental properties) or provide separate keys. You can also use services like Mercoly to compare trusted residential locksmiths in your area and read customer feedback in one place.
Most appointments take 30–60 minutes for 3–4 locks, depending on lock complexity and door condition.
The Rekeying Process
The locksmith will:
- Remove the lock cylinder from your door
- Extract the existing pins and springs
- Install new pins matched to your new key
- Test the lock with both the new key and an old key (to confirm the old key no longer works)
- Reinstall the cylinder and hand you your new keys
The entire job is noninvasive—no drilling, no damage to your door frame or hardware. You'll walk away with new keys that work only on your doors.
What to Expect Cost-Wise
- Single lock rekey: $75–$150
- Three-lock package (typical entry points): $225–$450
- Five-lock package: $375–$600
- Master keying option (multiple locks opening with one key): add $25–$50 per lock
Travel fees ($30–$75) may apply if you live far from the locksmith's home base. Ask upfront.
Frequently Asked Questions
Q: Can I rekey just one door if I share a property with roommates? Yes, rekeying individual locks is standard. You can rekey your bedroom lock while leaving shared entrance locks unchanged.
Q: How long does a rekey last? Do I need to do it again? A rekey is permanent—it lasts the life of the lock hardware, often 10+ years. You only need another rekey if you lose keys, suspect unauthorized copies exist, or change occupancy.
Q: Will rekeying damage my door or frame? No, professional rekeying is completely non-invasive and leaves your door hardware intact.
Start by calling a licensed local locksmith for a quote this week—most can schedule you within days.