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Crenshaw Lock

Lock Installation in Duarte · 24/7 mobile

Lock Installation in Duarte, California

Crenshaw Lock Company provides mobile lock installation in Duarte, California, for new doors and openings that never had a lock. We are available 24/7 and come to your home, office or gate. Call (323) 997-8867 to describe the door and plan the right hardware.

  • Mobile to your Duarte location
  • Available 24/7
  • Price quoted before we start
Call (323) 997-8867or tap to call — we answer 24/7
New deadbolt being fastened to a white front door
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Installing a lock where none existed is a different job from swapping one out. There is no old bore to reuse, so the door itself has to be measured, marked and drilled correctly. In Duarte that might be a new side door on a 1950s ranch home, a converted garage entry, a freshly built gate, or an office door in a medical-professional suite near City of Hope. Every one of these deserves hardware chosen for the door it is going into.

Crenshaw Lock Company has served Greater Los Angeles and Ventura County since 1987, and owner and lead technician David Shar built the business on careful, clean installs. We are fully mobile, so there is no storefront to visit. We bring the tools and a range of hardware to your door in Duarte, any hour of the day or night.

A good installation is about more than a clean hole. The door thickness, the frame, the strike plate, the screws and the way the door is used all affect how well a lock holds up. We look at the whole opening, explain the options in plain terms, and install so the lock works smoothly and resists the common ways doors are forced.

How it works in Duarte

  1. 1

    Talk through the door and the goal

    When you call (323) 997-8867, we ask what the door is, what it is made of, and what you need: a deadbolt, a keyed knob, a handleset, a gate lock or a keypad. Knowing whether it is a new entry, a garage side door or an office door shapes what we bring.

  2. 2

    Inspect the door and frame

    On arrival we check door thickness, material, condition and the frame. A hollow or damaged door may need reinforcement, and a weak frame undermines even a strong deadbolt. We tell you what we see before any drilling starts.

  3. 3

    Choose the hardware together

    We go over grade, finish, keying and whether you want the lock to match other doors. If you are consolidating keys, we can set the new lock to work with your existing ones where the hardware allows.

  4. 4

    Mark, drill and fit

    We use a template to mark the face bore and edge bore so the latch and bolt line up precisely. Then we drill, mortise the latch plate, and fit the lock so the bolt throws freely without rubbing or binding.

  5. 5

    Install and reinforce the strike

    The strike plate is set into the frame with long screws that reach the framing behind the jamb. This step does a lot of the real work against forced entry and is often skipped on rushed installs.

  6. 6

    Test and hand over keys

    We cycle the lock several times with the door open and closed, check alignment, and make sure every key works. You get the keys and a quick walkthrough on care and operation.

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What affects the price

  • The type of lock: a basic deadbolt, a handleset combination, a keypad or a gate lock each involve different hardware and labor.
  • The door material and condition, since solid wood, metal, hollow-core and older weathered doors need different drilling approaches and sometimes reinforcement.
  • Whether the door has to be prepared from scratch, with new bores cut, or already has partial preparation.
  • The grade and brand of hardware you choose, including finish and security features.
  • How many locks are being installed and whether they should be keyed alike to simplify your key ring.
  • Time of day, since we are 24/7 and after-hours or urgent calls can be priced differently than scheduled daytime visits.

Why Duarte chooses us

  • Fully mobile service: we work at your Duarte door, so you never travel to a shop and nothing is left unsecured while you wait.
  • Operating since 1987, with owner David Shar leading the work and standing behind it.
  • Available 24/7, which matters when a break-in attempt or a new gate leaves you needing a lock fitted right away.
  • We reinforce strike plates and check frames as part of the install rather than treating the lock alone as the answer.
  • We explain options plainly and tell you if a cheaper or simpler lock actually suits the door better.
  • We can pair installation with rekeying so front, back and garage doors operate on a single key.

Lock Installation across Duarte

Duarte's housing is a mix that shapes the lock work we do here. The Butler and Cotter areas are full of 1950s and 1960s single-story ranch and tract homes. Many were built with a single basic entry lock, and owners often add a deadbolt, secure a side door, or fit hardware on a converted garage or back entry. We also see a lot of owners who want front, back and garage doors on a single key after buying a home.

Further up toward Royal Oaks and the Fish Canyon area, custom foothill homes tend to have long driveways, side gates and detached structures. After a break-in attempt, homeowners often ask for a new deadbolt and a proper gate lock. Properties in ZIP 91010 near Mountain Avenue and Buena Vista Street are a good example, and the same goes for homes in 91009. Newer condos and apartments closer to the A Line have their own rules about what can be changed, so check with your HOA or landlord first.

The City of Hope campus brings a large medical-professional population to the area. Whether it is a home office, a storage room or a residence near the hospital, we can install hardware to suit your schedule, including after shifts or overnight. Whether you are off Huntington Drive on old Route 66, near Encanto Park, or close to the Duarte Recreational Trail along the San Gabriel River, call (323) 997-8867 and we will come to you.

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Other Duarte locksmith services

See all of our Duarte services, or our citywide lock installation page.

Lock Installation in Duarte — FAQs

What does lock installation cover in Duarte?
It covers fitting a lock where none existed, such as a new door, converted garage entry, new gate or added deadbolt. We drill the door, set the latch and strike, and test everything. Call (323) 997-8867 to describe your door.
Is lock installation different from replacing a lock?
Yes. Replacement uses an existing bore, while installation often means cutting new holes in the door and mortising the edge. It takes more precision and prep, and the door and frame need to be inspected first.
Can you install a deadbolt on an older ranch home door?
Usually, yes. Many 1950s and 1960s doors in Butler and Cotter can take a deadbolt. We check the thickness and condition first and tell you if the door needs reinforcement.
Do you install locks on gates?
Yes. Foothill homes near Royal Oaks and Fish Canyon often have side or driveway gates that need a proper lock. We assess the gate material and latch style and recommend suitable hardware.
Can you do this after hours or overnight?
We are available 24/7. If a break-in attempt or a new door leaves you exposed, call (323) 997-8867 any time and we will plan the work with you.
Do I need to come to a shop?
No. We are fully mobile and have no storefront. We come to your home, office or gate anywhere in Duarte.
Can the new lock use the same key as my other doors?
Often it can, depending on the brand and keyway of your existing locks. We can discuss keying options so you carry fewer keys.
Should I check with my landlord or HOA first?
If you rent or live in a condo or apartment, yes. Many have rules about hardware changes. Once approved, we can install it to match.
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