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Crenshaw Lock

High Security Locks in San Dimas · 24/7 mobile

High Security Locks in San Dimas, California

Crenshaw Lock Company installs pick-, bump- and drill-resistant high security locks and keys throughout San Dimas, California. We are a fully mobile locksmith available 24/7, and we come to your home, barn, gate or business. Call (323) 997-8867 to talk through your property and options.

  • Mobile to your San Dimas location
  • Available 24/7
  • Price quoted before we start
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High-security lock cylinder with a dimple key
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A standard builder-grade deadbolt is designed to keep an honest person honest. It is not designed to stand up to someone who knows how to pick, bump or drill a cylinder. High security locks are built differently: tighter tolerances, hardened inserts that resist drilling, pin designs that frustrate picking and bumping, and key control that makes unauthorized copies harder to get. In San Dimas, where many homes sit on larger lots and many properties have outbuildings, side gates and long drives, that extra resistance can matter on more doors than people first realize.

Crenshaw Lock Company has served Greater Los Angeles and Ventura County since 1987, and owner and lead technician David Shar built the business around being fully mobile. There is no storefront to visit. We bring the work to you, whether that is a ranch-style house off Bonita Ave, a hillside home in Via Verde, or a barn and gated entrance near San Dimas Canyon.

This page explains how a high security upgrade works, what drives the cost, what makes it different from a regular lock change, and what is specific to San Dimas properties. If you would rather talk it through, call (323) 997-8867 any time, day or night.

How it works in San Dimas

  1. 1

    Talk through what you are protecting

    We start with a conversation about the property: the front door, a back slider, a side gate, a barn, a detached garage or a business entrance. We ask about your current locks, who has keys, and whether you have had a break-in or a lost key. That tells us where a high security cylinder actually adds value and where a simpler fix is enough.

  2. 2

    Inspect the doors, frames and hardware

    A strong cylinder is only as good as what surrounds it. On site we look at the door material, the strike plate, the frame and the bore dimensions. Many 1960s and 1970s ranch-style homes have thin strikes or short screws that deserve attention alongside the lock itself.

  3. 3

    Recommend the right lock for each opening

    We explain options in plain terms: pick-resistant and bump-resistant cylinders, drill-resistant hardened components, and restricted keyways that limit key duplication. For a padlocked gate or barn, the answer may be a different style of hardware than for a front door. You decide what fits your needs.

  4. 4

    Install and test on site

    We install the new hardware, align the bolt and strike, and test it repeatedly with the door open and closed. Because we are mobile, the work happens at your property, and we make sure the door operates smoothly before we leave.

  5. 5

    Cut and hand over your keys

    We cut and verify your keys, explain how the key control or restricted duplication works for your system, and go over how to order additional keys if you need them. We also point out any remaining weak spots we noticed so you can plan future upgrades.

Need high security locks in San Dimas?

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

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What affects the price

  • The number of locks and openings you want to upgrade, such as one front door versus a house, gate, barn and garage.
  • The security level and key control features you choose, since restricted keyways and hardened components vary by product.
  • The condition of the door, frame and strike plate, and whether reinforcement is advisable for the lock to perform as intended.
  • Whether you want locks keyed alike so one key works across several doors, or each opening keyed separately.
  • The type of opening, as a padlock for an outdoor gate or barn differs from a deadbolt, a commercial storefront door or a patio slider.
  • The time of day and urgency of the visit, such as a scheduled upgrade versus an after-hours call following a break-in.

Why San Dimas chooses us

  • Fully mobile service: we come to your San Dimas home, property or business rather than asking you to bring hardware to a shop.
  • Serving the region since 1987, with David Shar as owner and lead technician.
  • Available 24/7, so a break-in or lost key at night does not have to wait until morning to be secured.
  • We look at the whole opening, including the strike, frame and door, instead of selling you a cylinder that the surrounding hardware undermines.
  • We match hardware to the setting, whether that is an HOA-style home, an equestrian property with outdoor gates, or a small downtown retail door.
  • Plain-language recommendations: we tell you where high security is worth it and where a standard lock is perfectly adequate.

High Security Locks across San Dimas

San Dimas has a mix of property types that each call for a different approach. In the Via Verde planned community on the southern hills, homes tend to follow HOA-standard hardware and finishes, so upgrades there are often about keeping a consistent look while improving the cylinder behind it. Many homeowners call after buying a home and wanting to know exactly who might still hold a copy of the old keys, which is a good moment to move to a restricted-key high security system.

Near San Dimas Canyon and the larger lots around Frank G. Bonelli Regional Park and Puddingstone Reservoir, the semi-rural, horse-keeping character of the area means barns, outbuildings and gated drives that rely on padlocks and gate hardware. Equipment, tack and vehicles are often stored away from the main house, so stronger locks on these secondary buildings are a practical upgrade. The dominant 1960s and 1970s ranch-style homes across the 91773 ZIP code often have original hardware that has simply aged out.

In Old Town San Dimas, the western-facade buildings along Bonita Ave house small retail and civic spaces where front and back doors see steady use and where key control matters when staff change. We can reach properties from Arrow Hwy and San Dimas Ave to Foothill Blvd, with easy access via Interstate 210 and SR-57. Whatever the setting, call (323) 997-8867 and we will come to you.

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Other San Dimas locksmith services

See all of our San Dimas services, or our citywide high security locks page.

High Security Locks in San Dimas — FAQs

What makes a lock "high security"?
High security locks use tighter manufacturing tolerances, more complex pin or locking designs, and hardened components to resist picking, bumping and drilling. Many also use restricted keyways so keys cannot be casually copied. Call (323) 997-8867 and we can explain which approach suits your door.
Do you offer high security locks for barns and gates in San Dimas?
Yes. Equestrian and larger-lot properties near San Dimas Canyon often have barns, outbuildings and gated drives. We can recommend hardware suited to outdoor exposure and install it at your property.
Can you upgrade my locks without changing how my Via Verde home looks?
Often yes. We can install a high security cylinder in a way that keeps your existing finish and style consistent with HOA-standard hardware. Check your HOA guidelines, and we can work within them.
Is there a shop I can visit?
No. Crenshaw Lock Company is fully mobile, so we come to you anywhere in San Dimas, including the 91773 area. Call (323) 997-8867 to arrange a visit.
Are you available after hours?
Yes, we are available 24/7. If you have had a break-in or lost keys and want stronger locks right away, call us at any hour and we will help secure the property.
Will a high security lock stop every break-in?
No lock is unbeatable, and we do not claim otherwise. High security locks make common attacks like picking, bumping and drilling much harder. Pairing them with a solid door, frame and strike plate gives the best protection.
What determines the cost of a high security upgrade?
Price depends on how many openings you are upgrading, the security level and key control you choose, the condition of your doors and frames, and the urgency of the visit. We explain the factors and talk through options before work begins.
Can all my doors use the same key?
In most cases, yes. We can key several high security locks alike so one key works across your house, garage and other doors, or we can key them separately if you prefer.
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