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Crenshaw Lock

Deadbolt Installation in Sylmar · 24/7 mobile

Deadbolt Installation in Sylmar, California

Crenshaw Lock Company installs and replaces single- and double-cylinder deadbolts in Sylmar, California, around the clock. We are fully mobile and come to your door, whether it's a tract home or a foothill property. Call us 24/7 at (323) 997-8867 to talk through your door.

  • Mobile to your Sylmar 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
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A deadbolt is only as strong as the door, the frame and the strike it bolts into. In Sylmar that matters more than people expect. The community stretches from the valley floor up into the San Gabriel foothills, and the homes along the way are very different: 1960s to 1980s tract houses, older modest homes, newer gated subdivisions, and large-lot equestrian properties with detached outbuildings. A deadbolt that suits a stucco tract home off Foothill Boulevard is not necessarily the right answer for a ranch-style entry or a barn-side door.

Crenshaw Lock Company has served Greater Los Angeles and Ventura County since 1987, and owner and lead tech David Shar has seen how the Northeast Valley's history shows up in front doors. Sylmar was the epicenter of the 1971 earthquake and took heavy effects from Northridge in 1994, and decades of settling can leave frames slightly racked. A new deadbolt installed without checking alignment can bind, drag or refuse to throw fully. We look at the whole door, not just the lock.

We are mobile only. There is no storefront to visit; we bring the hardware and tools to your property at any hour. Whether you are adding a first deadbolt to a door that only has a knob lock, replacing a worn one, rekeying after a move, or choosing between single and double cylinder, we explain the options plainly and let you decide.

How it works in Sylmar

  1. 1

    Talk through the door and your goal

    When you call (323) 997-8867, we ask what the door is, what lock it has now, and what you want to fix: a first deadbolt, a replacement, a rekey, or an upgrade after a break-in or a move. That lets us bring suitable hardware.

  2. 2

    Inspect the door, jamb and strike

    On site we check the door's thickness and condition, the bore holes, the jamb, and how the existing latch lines up. In older Sylmar homes with settled or racked frames, this step often reveals why a deadbolt has stopped throwing smoothly.

  3. 3

    Choose single or double cylinder

    A single cylinder has a thumb turn inside. A double cylinder needs a key on both sides. We explain the trade-offs, including that keyed-both-sides locks can slow exit in an emergency and may be affected by local fire and building considerations, so you choose with full information.

  4. 4

    Install and reinforce

    We fit the deadbolt, drilling or adjusting the door where needed, and set the strike so the bolt extends fully into the frame. Where the jamb is weak or misaligned, we can realign or reinforce the strike area so the lock does its job.

  5. 5

    Test, key and hand over

    We cycle the bolt repeatedly with the door open and closed, confirm it throws smoothly, and make sure every key works. If you want the new lock keyed to match others on the property, we can discuss that during the visit.

Need deadbolt installation in Sylmar?

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What affects the price

  • Whether you are adding a new deadbolt to a door with no bore or replacing an existing one, since new boring takes more work than a swap.
  • The type of deadbolt: single cylinder, double cylinder, or an electronic or smart deadbolt for newer builds.
  • The grade and finish of the hardware, including options suited to weather-exposed doors on foothill and equestrian properties.
  • The condition of the door and frame, including any realignment, strike repair or jamb reinforcement needed after settling or racking.
  • Whether several doors are being done at once or matched to a single key.
  • The hour and location of the visit, since we are available 24/7 and travel to you.

Why Sylmar chooses us

  • Fully mobile service: we come to your Sylmar door with hardware on the truck, with no storefront to visit.
  • Available 24/7, including nights and weekends, so a broken-in door can be secured when you need it.
  • In business since 1987, with owner and lead tech David Shar's long experience with Northeast Valley homes.
  • We look at alignment and the frame, not only the lock, which matters on older foothill homes where settling has left deadbolts binding.
  • We explain single versus double cylinder honestly and don't push hardware you do not need.
  • Familiarity with Sylmar's mix of tract homes, gated subdivisions and rural properties, so recommendations fit the property.

Deadbolt Installation across Sylmar

Sylmar covers a lot of ground, and the right deadbolt depends on where you are. In the gated Rancho Cascades area, newer homes often have electronic driveway gates and keypads alongside the front door, and after a resale it is common to want the entry deadbolts rekeyed or upgraded at the same time the access system is sorted out. We handle the door hardware side of that; for gate or call-box issues, tell us on the phone what you have so we can plan the visit.

Up toward El Cariso and the Olive View foothill district, you find older homes and larger lots, some with equestrian outbuildings. Here, a common call is a deadbolt that no longer throws because the frame has shifted over the decades since the 1971 and 1994 earthquakes. Realigning the strike and jamb, then installing or rekeying the deadbolt, often solves it. Exposure to dust and grit also takes a toll, so we can suggest more weather-resistant hardware for doors that face the elements.

We serve ZIP code 91342 and the surrounding streets, from homes near Foothill Boulevard, Hubbard Street and Roxford Street to properties close to Olive View-UCLA Medical Center, El Cariso Community Regional Park and Veterans Memorial Community Regional Park. Whether you are just off the I-5, I-210 or SR-14 interchange or well up in the foothills, call (323) 997-8867 any time.

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Other Sylmar locksmith services

See all of our Sylmar services, or our citywide deadbolt installation page.

Deadbolt Installation in Sylmar — FAQs

Can you install a deadbolt on a door that does not have one?
Yes. If the door is suitable, we can bore it for a deadbolt and fit the strike in the frame. We check the door's thickness and condition first. Call (323) 997-8867 and describe the door.
What is the difference between single and double cylinder deadbolts?
A single cylinder uses a key outside and a thumb turn inside. A double cylinder needs a key on both sides. Double cylinders can help where glass is near the lock but can slow exit in an emergency, so we talk through it before you decide.
My deadbolt will not fully extend. Is it the lock?
Often it is alignment. Settling and past earthquake stress in Sylmar homes can leave the door and strike slightly out of line. We can realign the strike and jamb, and replace the deadbolt if it is worn.
Can you rekey the deadbolt instead of replacing it?
In many cases yes, if the lock is in good shape. Rekeying makes old keys stop working without a new lock. If the hardware is worn or low quality, we will tell you replacement may make more sense.
Do you install smart or electronic deadbolts?
We can discuss electronic and smart deadbolts, which are increasingly common in newer Sylmar builds. Tell us what you have in mind when you call (323) 997-8867 so we can plan accordingly.
Do you come out at night or on weekends?
Yes, we are available 24/7 and fully mobile, so we come to your home at any hour. There is no shop to visit.
Can you secure the doors on a gated or rural property?
Yes. We work at gated subdivisions like Rancho Cascades and on larger foothill and equestrian lots. Let us know about gates or long driveways when you call (323) 997-8867.
How is the cost of a deadbolt installation determined?
It depends on the type and grade of the deadbolt, whether the door needs new boring, any frame or strike work, how many doors, and the time and location of the visit. We explain what applies to your door before work begins.
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