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Crenshaw Lock

Deadbolt Installation in Diamond Bar · 24/7 mobile

Deadbolt Installation in Diamond Bar, California

Crenshaw Lock Company provides mobile deadbolt installation in Diamond Bar, California, 24 hours a day, 7 days a week. We add or replace single- and double-cylinder deadbolts right at your door. Call (323) 997-8867 to talk through your door and lock options with a technician.

  • 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
Deadbolt bolt extended into a reinforced strike plate
Open now(323) 997-8867

A deadbolt is the one piece of hardware on your front door that does most of the real security work. In Diamond Bar, where so many homes are two-story tract and semi-custom houses built between the 1960s and 1980s, the original hardware is often decades old. Springs wear, bolts stiffen, strike plates loosen, and a lock that once slid smoothly can start to stick or fail to retract altogether.

Crenshaw Lock Company has served Greater Los Angeles and Ventura County since 1987, and we are fully mobile. There is no storefront to visit. We bring the hardware and tools to your door, whether you are off Diamond Bar Blvd, up in a hillside neighborhood, or in an office suite near the freeway interchange. Owner and lead technician David Shar built the business on doing careful, clean installs that last.

Installation can mean adding a deadbolt where there is only a knob lock, replacing a worn one, upgrading to a different grade, or fitting a smart or keypad deadbolt that many Diamond Bar homeowners now prefer. We look at the door itself, because a strong lock in a weak door or loose frame does not give you much protection.

How it works in Diamond Bar

  1. 1

    Call and describe your door

    Phone (323) 997-8867 any time. Tell us whether you want a new deadbolt added or an old one replaced, the door material, and whether you prefer keyed, keypad, or smart. We will tell you what to expect before we head your way.

  2. 2

    We come to you

    Because we are fully mobile and available around the clock, a technician travels to your home or business with a selection of hardware and tools. Nothing requires a trip to a shop.

  3. 3

    Inspect the door and frame

    We check door thickness, existing bore holes, the edge, the jamb, and the strike plate. Older Diamond Bar tract homes sometimes have worn or shallow strike areas that need reinforcing for the bolt to hold properly.

  4. 4

    Fit the deadbolt

    We install the new single- or double-cylinder deadbolt, align the bolt so it throws fully without binding, and secure the strike with appropriate screws that reach the framing. If a new hole must be bored, we do it cleanly to protect the door finish.

  5. 5

    Test and key setup

    We operate the lock repeatedly with the door open and closed, including in warm conditions that cause sticking. We can key it to match other locks when the hardware allows, and set up codes on keypad or smart models.

  6. 6

    Walkthrough and care tips

    We show you how the lock works, hand over keys, and explain simple upkeep so the new deadbolt keeps operating smoothly for years.

Need deadbolt installation 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

  • Whether you are adding a brand-new deadbolt or replacing an existing one, since new installs may require boring the door.
  • The type of lock chosen: standard keyed, high-security, keypad, or smart deadbolt all differ in hardware cost.
  • Single-cylinder versus double-cylinder, and whether a double-cylinder is appropriate for your door and safety needs.
  • Door and frame condition, including whether the strike plate, jamb, or edge needs reinforcement or repair.
  • The number of doors being done and whether you want them keyed alike.
  • Finish and brand requirements, especially for custom or high-end entry hardware that must match existing fixtures.

Why Diamond Bar chooses us

  • Fully mobile, 24/7 service means no storefront trip and no waiting for business hours.
  • In business since 1987, with owner and lead technician David Shar guiding the work.
  • We inspect the door and strike, not just the lock, so the installation actually improves security.
  • Comfortable with older 1960s-1980s tract doors as well as custom doors with finish hardware that should not be scratched.
  • We handle smart and keypad deadbolts as well as traditional keyed models, and explain tradeoffs without pushing the priciest option.
  • We describe pricing in terms of what drives it, so you know what you are paying for before work begins.

Deadbolt Installation across Diamond Bar

Diamond Bar is a hillside suburb, and its housing shapes the work we do. Many two-story tract homes in areas like Pathfinder and around Sunset Crossing have original hardware from decades ago. A family off Diamond Bar Blvd may call because a worn deadbolt no longer retracts in the heat, and we can rekey or replace it on the spot. Attached garages and side doors are another common place to add a proper deadbolt.

Up in The Country Estates, the guard-gated enclave, homes often have large custom entries with high-end hardware, keypad gates, and multi-point patio-door locks. We take extra care to avoid marring finish hardware and can work with your existing style. In the Summitridge area, hillside homes often have multiple entries worth securing with matching deadbolts. We serve ZIP codes 91765 and 91789.

Near the SR-57/SR-60 interchange at Grand Avenue, strip centers and office parks near Diamond Hills Plaza have their own needs, such as after-hours cylinder changes on aluminum-storefront doors. Whether you are near Sycamore Canyon Park, the Diamond Bar Golf Course, Diamond Bar Center, or along Golden Springs Dr, our mobile technicians reach you day or night.

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 deadbolt installation page.

Deadbolt Installation in Diamond Bar — FAQs

Can you install a deadbolt where there isn't one now?
Yes. If your door has only a knob lock, we can bore for a new deadbolt, fit the bolt and strike, and test it. Call (323) 997-8867 to discuss your door.
Do you offer deadbolt installation at night in Diamond Bar?
Yes. We are 24/7 and fully mobile, so you can call (323) 997-8867 at any hour about an urgent install, such as after a break-in or lost keys.
My deadbolt sticks in hot weather. Do I need a new one?
Not always. Heat can expand wood and shift older doors so the bolt binds. We check alignment and the strike first, then rekey or replace the lock if it is worn.
Should I choose single- or double-cylinder?
Single-cylinder uses a thumb turn inside and is easier to exit quickly in an emergency. Double-cylinder needs a key on both sides, which may suit doors with glass nearby. We explain tradeoffs for your door.
Can you install smart or keypad deadbolts?
Yes. Many Diamond Bar homes are moving to electronic deadbolts. We install them, set up codes, and confirm the bolt throws smoothly. Call (323) 997-8867 to talk through options.
Will installation damage my door finish?
We work carefully to protect the finish, which matters on custom entries like those in The Country Estates. If new holes are needed, we bore them cleanly.
Do you do commercial deadbolts or cylinders?
Yes. We can replace cylinders and fit deadbolts on offices and strip-center suites, including after hours, such as near the SR-57/SR-60 interchange.
Do I need to come to a shop?
No. We are mobile only and have no storefront. We come to your door anywhere in Diamond Bar, including ZIP codes 91765 and 91789.
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