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Moving Into a New Home? Why Rekeying or Replacing Locks Is Non-Negotiable

When you move into any home in the Inland Empire, you have no way of knowing how many copies of the key exist. Here is exactly what to do, what rekeying costs, and when full replacement makes more sense.

February 18, 20257 min read min readBy Lock Busters Team

Moving into a new home is one of the most significant days of your life. It is also, without exaggeration, a day when your home is at its most vulnerable from a security standpoint.

Here is the reality that most new homeowners in the Inland Empire do not consider until it is too late: at the moment you receive your keys at closing, you have no verifiable knowledge of how many copies of those keys exist in the world.

Who Might Have Keys to Your New Home Right Now

When you close on a resale property, consider who has interacted with that property over the past decade or more:

  • The previous owners and every member of their household
  • Copies made for adult children, elderly parents, neighbors with emergency access
  • Any housekeepers or domestic workers who were given keys
  • Contractors who performed repairs — plumbers, HVAC technicians, roofers, electricians
  • Real estate agents (the listing agent, buyer's agent, and potentially multiple showing agents)
  • Property management companies if the home was ever a rental
  • Previous tenants if there was ever a tenancy
  • Any copies made for those tenants' household members

A realistic estimate for a resale home with a typical ownership and rental history: 5–15 unknown key copies potentially in circulation.

New Construction Is Not Exempt

Many Inland Empire buyers assume new construction is safe from this problem. It is not.

During construction, your builder uses a construction master key — a single key that opens every lock on every home under construction in the development. This key is used by general contractors, subcontractors, building inspectors, and any other party who needs access during the build.

When you move in, every lock in your home still responds to that construction master key. Until you rekey, anyone who ever had a copy of the builder's construction master key can unlock your front door.

A single call to Lock Busters before you start unpacking resolves this entirely.

Rekey vs. Full Lock Replacement: How to Choose

Rekeying is right when:

  • The existing locks are in good working condition mechanically
  • You are satisfied with the security grade of the hardware (Grade 1 or Grade 2 deadbolts)
  • You want to save money — rekeying is significantly cheaper than replacement
  • You want all locks rekeyed to a single key for convenience

Rekeying changes the internal pin configuration of the lock cylinder. The key you received at closing no longer works. New keys are cut to a new pattern. The entire process takes about 20 minutes per lock.

Full lock replacement is right when:

  • The existing hardware is worn, damaged, or low-grade security
  • You want to upgrade to Grade 1 deadbolts from currently installed Grade 2 or lower hardware
  • You want to add smart lock functionality
  • The locks show signs of previous tampering or attempted picking
  • You simply want the psychological clean-break certainty of all-new hardware

What a Full Home Rekey Costs in the Inland Empire

Lock Busters pricing for residential rekeying:

Service Cost
Service call fee $55–$75
Per-lock rekeying $25–$45 per lock
Typical 3BR home (5–6 locks) $200–$345 total
Typical 4BR home (7–8 locks) $265–$435 total
Same-key convenience (all locks to one key) Included

We rekey all locks to a single master key as standard — no charge. No more hunting through a keyring for the right key for each door.

The Full Move-In Security Checklist

Rekeying is the foundation, but a complete move-in security review covers more:

1. Rekey or replace all exterior door locks (front, back, side, patio/slider lock).

2. Reset garage door keypads and change the garage door opener code. If your garage connects to the home's interior, it is effectively another exterior entry point.

3. Check all sliding door and window locks. These are frequently the path of least resistance in older IE homes. We can assess and upgrade secondary entry point hardware during the same appointment.

4. Evaluate door frame and strike plate quality. The most common residential break-in method in the Inland Empire is not lock picking — it is kicking the door frame until the strike plate fails. A Grade 1 strike plate with 3-inch screws into the wall stud dramatically increases resistance.

5. Check for hidden spare key locations. The previous occupant may have left keys hidden outside. Check standard locations: under the doormat, above the door frame, under potted plants, inside fake rocks, in the garage.

6. Update smart lock codes and app access if the home has existing smart lock hardware. Full removal and replacement of smart lock is recommended if you cannot verify the previous owner's account was fully deprovisioned from the lock's app.

Serving New Homeowners Across the Inland Empire

Lock Busters serves new homeowners across all 20 cities in our service area — San Bernardino, Fontana, Rancho Cucamonga, Ontario, Redlands, Loma Linda, Colton, Rialto, Highland, Victorville, Riverside, Corona, Moreno Valley, Upland, Chino, Chino Hills, Yucaipa, Grand Terrace, Muscoy, and Bloomington.

We typically complete a full home rekey in a single appointment lasting 45–90 minutes. Same-day service is available in most of our coverage area.

Call (909) 935-8844 for a free phone quote. Mention you are a new homeowner — we will walk through the full security checklist with you.

Frequently Asked Questions

Why should I rekey after moving into a home?

When you receive keys at closing, you have no way of knowing how many copies exist or who holds them. Previous owners, former tenants, contractors, housekeepers, real estate agents, and neighbors may all have copies. Rekeying immediately eliminates that unknown.

What is the difference between rekeying and replacing a lock?

Rekeying changes the internal pin configuration so the existing key no longer works — new keys are cut to a new pattern. The lock hardware stays. Lock replacement swaps the entire hardware assembly. Rekeying is faster and less expensive when the hardware is in good condition.

How much does rekeying a home cost in the Inland Empire?

Lock Busters charges $25–$45 per lock for rekeying, with a service call fee of $55–$75. A typical 3-bedroom home with 5–6 locks rekeyed to a single key runs $200–$350 total.

Should I also change the garage door code?

Yes. The garage door code and any keypads should be reset immediately when you move in. If the garage connects to the interior of the home, it is as important as the front door lock.

Does a new construction home need rekeying?

Yes. During construction, multiple contractors use a universal "construction master key" for access. All new construction locks should be rekeyed before or immediately after move-in to ensure contractor keys no longer work.

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