One of the most common questions we get from homeowners in Pleasant Hill and across Contra Costa County is: should I rekey my locks or replace them entirely? The answer depends on the condition of your hardware, your security goals, and your budget. Here's how to decide.
What Is Rekeying?
Rekeying changes the internal pin configuration of your existing lock cylinder so that old keys no longer work. A locksmith removes the cylinder, replaces the pins, and gives you new keys — all without touching the hardware on your door. It typically takes 10–15 minutes per lock and costs $25–$35 per lock.
What Is Lock Replacement?
Lock replacement means removing the entire lock mechanism and installing a new one. This makes sense when your hardware is worn, damaged, outdated, or you want to upgrade to a higher security level or smart lock. Replacement costs $75–$150 per lock including labor.
When to Rekey
- Moving into a new home
- After a breakup or roommate change
- Lost or stolen key
- Re-key multiple locks to one key
- Hardware is in good condition
When to Replace
- Lock is worn, damaged, or stiff
- Upgrading to a deadbolt or smart lock
- Older low-security hardware
- Home renovation or remodel
- Want a different brand or finish
When to Rekey
Rekeying is the right choice in most situations: moving into a new home, after a breakup or roommate change, after losing a key, or when you want to re-key multiple locks to one key. The lock hardware is in good condition and you just want to make sure no old keys work.
When to Replace
Replace your locks when the hardware is worn or damaged, when you want to upgrade to a deadbolt or smart lock, when the lock is an older low-security model, or when you're doing a full home renovation. Replacing also makes sense if you want a different brand or finish.
Cost Comparison
Rekeying a 3-lock home costs roughly $100–$150 total. Replacing those same 3 locks with mid-grade hardware runs $300–$600+. For most homeowners, rekeying delivers the same security outcome at a fraction of the cost.
2024 Pricing Guide — Contra Costa County
- Rekey (per lock)$25–$35
- Rekey (3-lock home, all-in)$100–$150
- Lock replacement (per lock, labor only)$50–$100
- Lock replacement (per lock, hardware included)$75–$150
- Smart lock installation (hardware included)$150–$300+
- Deadbolt upgrade (hardware included)$100–$200
All prices include labor. Hardware costs vary by brand and grade. We provide upfront pricing before starting any work.
We serve homeowners across Pleasant Hill, Concord, Walnut Creek, Lafayette, Danville, and all of Contra Costa County. See our residential locksmith services.
Rekeying & Lock Replacement Near You
We provide rekeying and lock replacement services throughout Contra Costa and Alameda Counties.
Frequently Asked Questions
How long does rekeying take?
Rekeying a single lock takes about 10–15 minutes. A full home with 3–4 locks typically takes 30–45 minutes. We carry all common pin sizes on our van so there's no waiting for parts.
Can a locksmith make a key from a lock?
Yes — a skilled locksmith can decode a lock and cut a new key from the lock itself, even without an existing key. This is called "key by code" or "impressioning" and is a standard service.
Is rekeying as secure as replacing?
Yes, when done by a licensed locksmith. Rekeying changes the internal pins so old keys are completely useless. The security level of the lock itself doesn't change — only who can open it.
Can I rekey my own locks?
DIY rekey kits exist for some Kwikset and Schlage locks, but they require the correct tools and technique. An improper rekey can leave the lock vulnerable or inoperable. Professional rekeying is inexpensive and guaranteed.