Open 24/7 · Greater Los Angeles & Ventura County

(323) 997-8867
Crenshaw Lock

Lock Rekeying in Diamond Bar · 24/7 mobile

Lock Rekeying in Diamond Bar, California

Crenshaw Lock Company provides mobile lock rekeying in Diamond Bar, California, so old keys stop working on your existing locks. We are available 24/7 and come to your home or office with the tools to do the work on site. Call (323) 997-8867.

  • Mobile to your Diamond Bar location
  • Available 24/7
  • Price quoted before we start
Call (323) 997-8867or tap to call — we answer 24/7
Lock cylinder opened for rekeying with pins and springs on a workbench
Open now(323) 997-8867

Rekeying changes the inside of a lock so that the keys that used to work no longer do, and a new key takes their place. The lock itself stays on the door. That makes it one of the most practical things to do after buying a home, ending a tenancy, parting ways with a roommate or contractor, or losing a set of keys. In Diamond Bar, where so many houses have changed hands over the decades, it is a sensible first step toward knowing exactly who can open your doors.

Most of Diamond Bar was built out in the 1960s through the 1980s, and many of those two-story tract and semi-custom homes still have original or mid-life deadbolts and knob sets. Some work fine and only need a rekey. Others are worn, sticky, or loose, and we will tell you plainly when a lock is better replaced than rekeyed. Newer electronic and smart deadbolts are increasingly common here too, and many of those can be re-coded or rekeyed for their key cylinder as well.

Crenshaw Lock Company has served Greater Los Angeles and Ventura County since 1987, led by owner and lead technician David Shar. We are fully mobile, which means there is no storefront to drive to. We come to you in Diamond Bar, day or night, and rekey the locks right where they are installed.

How it works in Diamond Bar

  1. 1

    Tell us what needs rekeying

    Call (323) 997-8867 and describe the property: how many exterior doors, whether there is a garage entry, side gate, patio door, or mailbox, and whether you want every lock on one key. Mention the brand if you know it, though we can identify it on arrival.

  2. 2

    We come to you

    We are 24/7 and fully mobile, so we travel to your Diamond Bar address with pinning kits, key blanks, and replacement hardware. Whether you are in a hillside home or a tract house off Diamond Bar Blvd, the work happens at your door.

  3. 3

    Inspect each lock

    Before anything is taken apart, we check each lock's condition. A deadbolt that sticks or no longer retracts in the heat may have worn internals or a misaligned strike, and we will explain whether rekeying will fix it or replacement makes more sense.

  4. 4

    Rekey the cylinders

    We remove the cylinder, replace the internal pins to match a new key, and reinstall it. Old keys no longer turn the lock. Where it makes sense, we match several locks to a single key so you carry one instead of five.

  5. 5

    Test and hand over keys

    We test every lock with the new key several times, confirm the old key fails, and check that doors latch and deadbolts throw smoothly. You get your new keys and can request extra copies on the spot.

  6. 6

    Advise on weak points

    If we notice a loose strike plate, a short screw, or an aging lock, we point it out without pressure. Any additional work is your decision.

Need lock rekeying in Diamond Bar?

24/7 Mobile Locksmith across Greater Los Angeles & Ventura County. We answer 24/7.

Call (323) 997-8867

What affects the price

  • The number of locks or cylinders being rekeyed, including deadbolts, knob sets, garage entry doors, and patio doors.
  • Lock type and brand, since high-security cylinders and some smart deadbolts take more time and specialized parts than standard residential hardware.
  • Condition of the existing hardware: a worn lock may need partial or full replacement instead of a simple rekey.
  • Number of keys you want cut and whether you want all locks keyed alike.
  • Time of day and urgency, since after-hours and same-day requests are handled differently than scheduled visits.
  • Property access, such as a gated community or multi-point patio locks that require extra steps.

Why Diamond Bar chooses us

  • Fully mobile service: we do the work at your door, so you never need to bring locks anywhere or visit a shop.
  • Operating since 1987, with owner David Shar leading the work and drawing on decades of experience with older residential hardware.
  • Honest rekey-or-replace advice: if a worn deadbolt would be better replaced, we say so rather than rekeying something that will fail again.
  • Experience with both traditional locks and electronic or smart deadbolts, which are increasingly common in Diamond Bar homes.
  • Careful handling of high-end entry hardware so finishes on custom-home doors are not scratched or damaged.
  • Available 24/7, including evenings and weekends when many people discover they need locks changed.

Lock Rekeying across Diamond Bar

Diamond Bar's housing stock shapes the work we do here. In neighborhoods like Pathfinder and the Sunset Crossing area, many homes date from the 1970s and 1980s, and original deadbolts have had decades of use. Heat can make a tired lock stick, and a rekey or a fresh deadbolt is often the practical fix for a family in a tract home off Diamond Bar Blvd or Golden Springs Dr. We regularly serve addresses in ZIP code 91765 and 91789 and know the hillside streets that wind away from the main roads.

The Country Estates is a different kind of job. This guard-gated enclave of large hillside custom homes often has high-end entry hardware, keypad gates, and multi-point patio-door locks. Rekeying there takes care, because the finish on premium hardware matters and a multi-point lock has more than one point of engagement to keep in sync. We work carefully to preserve those finishes. In the Summitridge area, similar hillside homes call for the same attention to detail.

We are based on the road, not in a storefront, so wherever you are in Diamond Bar, from near Sycamore Canyon Park and the Diamond Bar Golf Course to homes close to Diamond Bar Center and Diamond Hills Plaza, we come to you. Commercial needs here are modest, mostly strip centers and office parks near the SR-57/SR-60 interchange at Grand Avenue, and we can rekey those suites too. Call (323) 997-8867 any time.

Locked out or need a locksmith now?

24/7 Mobile Locksmith across Greater Los Angeles & Ventura County. We answer 24/7.

Call (323) 997-8867

Other Diamond Bar locksmith services

See all of our Diamond Bar services, or our citywide lock rekeying page.

Lock Rekeying in Diamond Bar — FAQs

What is the difference between rekeying and replacing a lock?
Rekeying changes the internal pins so a new key works and old keys do not, while keeping the same lock hardware. Replacing swaps the whole lock. Rekeying is usually the more economical choice when the lock is in good shape. Call (323) 997-8867 and we can help you decide.
Should I rekey my locks after buying a home in Diamond Bar?
Yes, it is a smart step. You cannot know how many copies of the old keys exist among prior owners, tenants, agents, or contractors. Rekeying makes sure only the keys you hold will work.
Can you rekey locks on a home in The Country Estates?
Yes. We work on high-end entry hardware and multi-point patio-door locks with care to avoid marring finishes. Gate keypads are a separate system, so mention that when you call so we can plan the visit properly.
My deadbolt sticks and will not retract in hot weather. Can rekeying fix it?
Sometimes, but not always. If the problem is worn internals or a misaligned strike, a rekey alone may not solve it. We inspect on site and tell you honestly whether to rekey, adjust, or replace the deadbolt.
Can all my locks be keyed to one key?
In most cases, yes. If the locks are compatible brands, we can rekey them to match so you carry a single key for the front door, back door, and garage entry. Some specialty or high-security locks may need different handling.
Can smart or electronic deadbolts be rekeyed?
Many have a standard key cylinder that can be rekeyed, and the electronic code can be changed separately. Since smart locks are increasingly common in Diamond Bar, tell us the brand when you call (323) 997-8867.
Do I need to be home during the rekey?
Someone with authority over the property should be present or have arranged access so we can reach each lock and hand over the new keys. We can discuss arrangements when you call.
Do you offer after-hours rekeying in Diamond Bar?
Yes. We are available 24/7 and fully mobile. If you need locks secured at night or on a weekend, such as after a lost key or break-in, call us and we will come to your location.
DS

Reviewed by David Shar — Owner & Lead Technician

Crenshaw Lock Company has served Greater Los Angeles & Ventura County since 1987.

Last updated 2026-10-12.

Call (323) 997-8867 · Open 24/7