Your locks are one of the first lines of defense for your home, yet most homeowners never think about rekeying them until something goes wrong. If you're not sure whether your locks need attention or how often to rekey them, you're not alone—but the answer matters more than you might think. Let's walk through when and why residential rekeying makes sense.
What Does Rekeying Actually Mean?
Rekeying isn't replacing your locks; it's changing the internal pin configuration so old keys no longer work. A residential locksmith removes the lock cylinder, replaces the springs and pins inside, and cuts or provides new keys that match the updated pins. Your existing lock hardware stays in place. It's a cost-effective alternative to buying and installing entirely new locks—typically running $50 to $150 per lock for labor, plus material costs.
Situations Where You Should Rekey Immediately
After moving into a new home. You never know who has copies of the previous owner's keys. Rekeying all exterior locks (front door, back door, garage entry) before moving your belongings in is standard practice. Most locksmiths charge $100 to $300 for a typical residential front-door rekeying appointment that covers 2–3 locks.
When you lose your keys. Lost keys are a legitimate security risk. Rekeying ensures the missing key won't open your door, even if someone finds it. Don't wait or hope it turns up.
After a break-in or attempted entry. Change the locks immediately. A burglar who gained access might have made a duplicate key or compromised the lock mechanism itself. Have a locksmith assess whether rekeying is sufficient or if you need new locks entirely.
If a tenant or roommate moves out. They had legitimate access to your home—rekeying removes their ability to return unexpectedly. This is especially important if the departure was contentious or if you're unsure how many key copies exist.
Scheduled Maintenance: The Every-3-to-5-Year Rule
Homeowners who haven't experienced any of the above scenarios should still rekey on a schedule. A reasonable baseline is every 3 to 5 years, particularly for frequently-used entry doors. This interval gives you peace of mind that old keys given to contractors, maintenance workers, or forgotten guests no longer function. You'll typically spend $150 to $400 to rekey three entry points.
If you live in a high-turnover rental market or have had multiple people come and go over the years, lean toward the 3-year mark. For owner-occupied homes where access is tightly controlled, every 5 years works fine.
Rekeying vs. New Locks
Not every situation calls for rekeying. Consider buying new locks if:
- Your locks are more than 15 years old and showing physical wear
- You want to upgrade to smart locks or deadbolts with better security ratings
- The rekeying cost approaches 70% of the price of a new lock
- You're concerned the mechanism itself has been compromised (skilled thieves can manipulate some older cylinders)
A quality residential deadbolt runs $30 to $80; labor for installation typically adds another $75 to $150 per lock. If your existing lock is mechanically sound, rekeying is usually the smarter financial move.
How to Hire a Residential Locksmith for Rekeying
Start by getting quotes from at least two local locksmiths. Prices vary based on location, the type of lock, and how many cylinders you're rekeying. Avoid bids that seem suspiciously low—inexperienced locksmiths may damage your locks or provide poor-quality rekeying. Ask whether the locksmith is licensed in your state, carries insurance, and can provide references.
Platforms like Mercoly make it easy to compare and find trusted residential locksmiths in your area, read reviews, and request quotes without calling around endlessly.
Frequently Asked Questions
Q: Will rekeying damage my locks or affect how they function? A: No—rekeying is a routine maintenance procedure that doesn't damage quality locks. Your locks will operate exactly as they did before, just with new keys.
Q: Can I rekey my own locks to save money? A: DIY rekeying kits exist, but they're error-prone and rarely save enough money to justify the risk; if you mess up, you're locked out or forced to call a locksmith anyway. Professional rekeying is worth the investment.
Q: What should I do with the old keys after rekeying? A: Destroy them (cut them in half or throw them away) so no one is tempted to try them, or keep them as backup identification if your locksmith records the pin code.
Get in touch with a certified residential locksmith today to assess your home's security and schedule your next rekeying.