If you just moved into a new home, had a break-in, lost a key, or ended a relationship with someone who had a copy of your house key — the first question is always the same: do I rekey my locks or replace them entirely?
Most people default to replacing because it feels more thorough. But in many cases, rekeying is the smarter and cheaper move. Here’s how to know which one you actually need.
What Is Rekeying?
Rekeying means a locksmith changes the internal pins inside your existing lock cylinder so that your old key no longer works and a new key does. The lock hardware stays exactly the same. Only the internal configuration changes.
It costs significantly less than replacing a lock — typically $20–$50 per lock for the labor, plus a small charge for new keys. If you have five locks on your home, rekeying all of them costs a fraction of buying five new deadbolts and having them installed.
Rekeying makes sense when:
- You just moved into a new home or apartment
- You lost a key and don’t know where it is
- You gave a key to a contractor, housekeeper, or ex and want to cancel their access
- Your locks are in good working condition and you like the hardware
What Is Lock Replacement?
Lock replacement means removing your existing lock hardware entirely and installing a new one. This gives you a new cylinder, new keys, and often a stronger or more modern mechanism.
Replacement makes sense when:
- Your lock is old, worn, or sticking
- You want to upgrade to a higher security rating (like ANSI Grade 1)
- You want to switch to a smart lock or keyless entry system
- Your door frame or lock was damaged in a break-in attempt
- You’re standardizing all your locks to one key (master keying)
What Happens During a Break-In Attempt?
This is important. If someone tried to force or pick your lock — even unsuccessfully — the internal pins may be damaged or misaligned. In that case, rekeying alone isn’t enough because the mechanical integrity of the lock is compromised. You need a full replacement.
For homes in San Antonio that have experienced a break-in or attempted entry, the Texas Department of Insurance recommends upgrading to deadbolts that meet ANSI/BHMA Grade 1 standards — the highest residential security rating available.
How Much Does It Cost in San Antonio?
Here’s a rough breakdown:
| Service | Typical Cost |
|---|---|
| Rekey one lock | $20–$50 |
| Rekey whole home (3–5 locks) | $75–$150 |
| Replace one deadbolt (hardware included) | $100–$200 |
| Replace and upgrade to smart lock | $150–$300 per lock |
Prices vary based on lock brand, number of locks, and whether you supply the hardware yourself. At RoadRunner Locksmith AKA we give you a quote before we start — no surprise charges at the end.
Should You Rekey After Moving Into a New Home in San Antonio?
Yes. Always. You have no way of knowing how many copies of the previous owner’s key exist. Real estate agents, contractors, cleaners, neighbors, and family members may all have had copies made over the years. Rekeying on move-in day is one of the cheapest security decisions you can make.
San Antonio has seen steady population growth, with new residents moving into both established neighborhoods like Alamo Heights and Stone Oak and newer developments on the North Side (78248, 78258, 78260). If you’re one of the thousands moving into a new home this year, rekeying should be on your move-in day checklist alongside changing the utilities.
Can You Rekey Your Own Locks?
Technically yes — rekey kits are available at hardware stores. But it requires disassembling the lock, ordering the right pin kit for your specific lock brand, and reassembling everything correctly. One wrong pin and your lock won’t work at all. For a job that a licensed locksmith completes in 10–15 minutes per lock, most homeowners find the DIY route isn’t worth the risk.
What About Smart Locks?
Smart locks — brands like Schlage Encode, August, and Kwikset Halo — give you keyless entry via a code or your phone. They’re popular for Airbnb hosts, people who lose keys frequently, and homeowners who want to give temporary access to housecleaners or dog walkers without making a physical key copy.
If you’re considering a smart lock upgrade for your San Antonio home, our team can advise on which models work best with your existing door hardware and handle the installation. Visit our Residential Locksmith Services page for more.
The Bottom Line
- Just moved in or lost a key? Rekey.
- Lock is damaged, old, or you want an upgrade? Replace.
- Had a break-in attempt? Replace and upgrade.
- Want keyless entry? Replace with a smart lock.
If you’re not sure which one applies to your situation, call us and we’ll tell you honestly. Sometimes a $25 rekey is all you need. We’re not going to sell you a $200 lock replacement if it isn’t necessary.
Book a Rekey or Lock Replacement in San Antonio
RoadRunner Locksmith AKA serves all of San Antonio and surrounding areas including Laredo, McAllen, Edinburg, and Pharr. Call us at (210) 630-3993) or contact us here. We’re available 24/7 for emergencies and offer free consultations.
See our full list of residential locksmith services or check if we cover your area on our locations page.
RoadRunner Locksmith AKA — Lic. #B30828401 — San Antonio · Laredo · McAllen · Edinburg · Pharr