When to Rekey vs Change Locks: A Complete Guide
Make the right choice for your home security and budget.
Rekey your locks when the existing hardware is in good condition and you just need new keys - it is cheaper and faster. Change your locks when the hardware is old, damaged, or you want to upgrade security features. Rekeying costs $20-$50 per lock, while replacement costs $75-$200 per lock including hardware.
What Is Rekeying?
Rekeying changes the internal pins of a lock so that old keys no longer work. The locksmith creates a new key configuration without replacing the lock itself. After rekeying:
- Old keys will not open the lock
- You get new keys that work
- The lock looks and functions the same
What Is Lock Replacement?
Lock replacement removes the entire lock mechanism and installs new hardware. This is a more comprehensive change that gives you completely new locks.
When to Rekey Your Locks
- Moving into a new home - Previous owners or tenants may have copies
- Lost or stolen keys - Ensure old keys cannot be used
- Roommate or employee leaves - Revoke their access
- After a break-in attempt - If lock is undamaged
- Want one key for all locks - Match multiple locks to one key
When to Replace Your Locks
- Locks are damaged - Worn, stiff, or malfunctioning
- Locks are outdated - Grade 3 or old technology
- Want better security - Upgrade to high-security or smart locks
- After a successful break-in - Lock may be compromised
- Aesthetic upgrade - Want new finish or style
Cost Comparison
| Factor | Rekey | Replace |
|---|---|---|
| Cost per lock | $20 - $50 | $75 - $200+ |
| Time required | 5-10 minutes/lock | 15-30 minutes/lock |
| New hardware | No | Yes |
| Security upgrade | No | Possible |
Example Scenarios
Scenario 1: Just Bought a House
Best choice: Rekey - If the existing locks are in good condition and relatively modern, rekeying is the cost-effective choice. You can also have all locks keyed alike so one key opens everything.
Scenario 2: Old Locks on Older Home
Best choice: Replace - If the locks are over 10-15 years old or are basic Grade 3 locks, upgrading to modern Grade 2 deadbolts provides better security.
Scenario 3: Rental Property Turnover
Best choice: Rekey - Quick and affordable between tenants. Some landlords use SmartKey locks for DIY rekeying.
Scenario 4: Want Smart Home Integration
Best choice: Replace - You will need to install new smart lock hardware to gain keyless entry and app control features.
Can I Rekey Locks Myself?
Some locks like Kwikset SmartKey allow DIY rekeying with a special tool. However, for most locks, professional rekeying is recommended to ensure it is done correctly. Improper rekeying can damage the lock.
Professional Lock Services in NC
Key Guy Locksmith provides both lock rekeying and lock replacement services:
Not Sure Whether to Rekey or Replace?
Key Guy Locksmith can assess your locks and recommend the best option. Free quotes available.