Rekeying vs. Replacing Locks: Which Is Right for You?

When you move into a new home, lose a key, or want to upgrade security, you have two main options: rekeying existing locks or replacing them entirely. Understanding the difference can save you money while ensuring your property is secure.

What Is Rekeying?

Rekeying changes the internal pins of your existing lock so that old keys no longer work. Your lock stays the same, but a new key is created. This is possible because lock cylinders contain spring-loaded pins that must align at a specific height (determined by the key) to allow the lock to open.

What Is Lock Replacement?

Lock replacement means removing the entire lock mechanism and installing a brand new one. This gives you new hardware, a new cylinder, and new keys.

When to Choose Rekeying

Rekeying is often the better choice when:

• Moving into a new home: You don't know who has copies of existing keys
• After a breakup or roommate change: Regain control of who has access
• Lost keys: Prevent found keys from being used
• Employee turnover: Maintain business security
• Your locks are in good condition: No need to replace working hardware
• You want one key for multiple locks: We can key all locks alike
• Budget is a concern: Rekeying costs less than replacement

When to Choose Replacement

Full lock replacement makes sense when:

• Locks are old or worn: Sticky, hard to turn, or unreliable
• Security upgrade needed: Moving to high-security locks
• Aesthetic change: Updating to match new hardware finishes
• After a break-in: Locks may be damaged even if not visibly
• Smart lock installation: Requires new hardware
• Lock is damaged: Can't be rekeyed reliably
• Changing lock type: From knob to deadbolt, for example

Cost Comparison

Here's a general comparison for Phoenix area pricing:

Rekeying:	$15-30 per lock
Basic lock replacement:	$50-100 per lock (including hardware)
High-security lock replacement:	$150-300 per lock
Smart lock installation:	$200-400 per lock

The Process

Rekeying Process

1. Remove the lock cylinder from the door
2. Disassemble the cylinder
3. Replace the pins to match a new key
4. Reassemble and test
5. Time: 10-15 minutes per lock

Replacement Process

1. Remove old lock hardware
2. Prepare door if needed for new lock
3. Install new lock mechanism
4. Adjust strike plate and alignment
5. Test operation
6. Time: 20-45 minutes per lock

Our Recommendation

For most situations, rekeying is the practical choice. It's faster, more affordable, and equally secure. However, if your locks are more than 10 years old, showing wear, or you want upgraded security features, replacement is worth the investment.

Not sure which option is right for you? Call Alcatraz Lock & Key at (602) 677-5045 for a free consultation. We'll assess your locks and recommend the most cost-effective solution for your security needs.