Should You Replace or Rekey Locks?

On February 25, 2026 By newsroom Topic: Home Services

1. Rekeying Locks

What It Is: Adjusting the existing lock to work with a new key by changing its internal pins/tumblers.
When to Rekey:
Multiple keys for different locks are inconvenient.
After moving into a new home.
Lost keys or changing concierge services (e.g., babysitter, pet sitter).
Cost:
Professional rekeying: $20–$50 per lock (labor-focused).
DIY rekey kits: $10–$25 (match kit to lock manufacturer).
Pros:
Affordable and quick.
Retains current lock hardware.
Great for high-quality locks.
DIY Feasibility:
Easy with a rekey kit.
Ensure you have the original key; otherwise, picking the lock costs extra.

2. Changing Locks

What It Is: Replacing the entire lock and key system with new hardware.
When to Replace:
Upgrading to keyless or master key systems.
Existing locks are low-quality, rusted, or broken.
You want a new aesthetic (e.g., matching hardware finishes).
Cost:
Professional installation: $75/hour + hardware costs.
DIY hardware kits: Varies, starting around $20–$150.
Pros:
Modernization options, like keyless entry.
New aesthetic or improved security.
DIY Feasibility:
Manageable for modern standard locks.
Older or specialty locks may require a locksmith.

Comparison: Rekeying vs. Replacing

| Feature | Rekeying | Replacing |
|-----------------------|------------------------|-----------------------|
| Cost | $20–$50/lock | $75/hour + hardware |
| Time | Quick | Longer for installation |
| DIY Feasibility | Easy with kit | Moderate (standard locks) |
| Best Use Case | Updating keys only | Hardware upgrade |

Deciding Factors

Budget-Friendly? Rekey.
Upgrading Aesthetics or Security? Replace.
Existing Locks High-Quality? Rekey.
Old, Rusty Locks? Replace.
Adding a Master Key or Keyless System? Replace.

Pro Tip:

Hire a locksmith if you're unsure about compatibility, security needs, or complex installations. They can also recommend whether rekeying or replacing is the best fit for your situation.