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Crenshaw Lock

Master Key System in Rolling Hills · 24/7 mobile

Master Key System in Rolling Hills, California

Crenshaw Lock Company designs and installs master-key and restricted-key systems for Rolling Hills, California estates, horse properties and outbuildings. We are a fully mobile locksmith available 24/7, and we come to you through the gates. Call (323) 997-8867 to plan a system that fits your property.

  • Mobile to your Rolling Hills location
  • Available 24/7
  • Price quoted before we start
Call (323) 997-8867or tap to call — we answer 24/7
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A master key system lets one key open many locks while each lock still has its own key. On a Rolling Hills property that can mean a main house, a guest casita, a pool house, a barn, a stable and a tack room. The owner carries one key, while a caretaker or ranch-hand carries a key that opens only the outbuildings and not the house.

Most properties here are large one-acre-plus ranch estates, many built in the 1950s and 60s, and over the decades the locks on them tend to pile up. Original ranch-era locksets sit next to newer deadbolts, and keys get copied and handed around. Nobody knows who holds what. A properly designed system with real key control replaces that tangle with a clear plan: who can open which doors, and who is allowed to make more keys.

Crenshaw Lock Company has served Greater Los Angeles and Ventura County since 1987, and owner David Shar leads the technical work. We are mobile only, with no storefront. We come to your property, walk it with you, and build the system around how your household and staff actually use it.

How it works in Rolling Hills

  1. 1

    Walk the property and map every lock

    We start by visiting the estate and listing every lock: house doors, garage, casita, barn, stable, tack room, gates and sheds. We note the brand, condition and age of each, including old hardware weathered by hilltop fog.

  2. 2

    Decide who needs access to what

    Together we sort people into access levels, such as owner, family, housekeeper, caretaker, ranch-hand and contractors. Each level gets a key that opens only the doors it should. This is the core of the design.

  3. 3

    Design the key hierarchy

    We lay out the structure: a top master, sub-masters for areas like the barn complex, and individual change keys. We explain trade-offs plainly, including that adding levels adds complexity and some added security considerations.

  4. 4

    Choose hardware and key control

    We select compatible cylinders and, where appropriate, a restricted keyway so keys cannot be casually duplicated at a hardware store. Worn or corroded locks that cannot take a new cylinder are replaced.

  5. 5

    Install, pin and test

    We install and pin the cylinders, then test every key against every lock to confirm each opens only what it should. Fully mobile service means this is done on site.

  6. 6

    Hand over keys and records

    You get the keys, a clear key chart and guidance on issuing, tracking and retrieving keys when staff change, so the system stays under control.

Need master key system in Rolling Hills?

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 and doors included, from a single house to a house plus barn, stable, tack room and guest buildings.
  • How many access levels you need, since more tiers in the hierarchy mean more design and pinning work.
  • Whether you choose a restricted keyway with key control or a standard keyway system.
  • The condition of existing hardware, because corroded or very old locks may need replacing rather than just rekeying.
  • How many keys you need cut at each level for family, staff and caretakers.
  • Whether electronic gate or access hardware is being integrated, and the time of day or urgency of the visit.

Why Rolling Hills chooses us

  • We are fully mobile and work on your property, which suits large estates where the locks are spread across acreage.
  • Since 1987 we have worked on older ranch-era hardware as well as modern high-security cylinders, so we can advise on what to keep and what to replace.
  • We design around real ranch routines, such as a caretaker who needs the barn but not the house, instead of selling a one-size system.
  • We explain the trade-offs of master keying honestly, including when a simpler rekey is the better answer.
  • You receive a key chart and clear guidance on key control, so the system keeps working after staff turnover.
  • We are available 24/7, so urgent changes such as a sudden staffing change do not have to wait.

Master Key System across Rolling Hills

Rolling Hills is a single gated community with three manned entry gates, and every visit begins with getting cleared in. Whether your home is in the Portuguese Bend Road area near the Main Gate, the Eastfield Drive area by the Eastfield Gate, or the Crest Road area near the Crest Gate, let security know to expect us. Main Gate traffic comes in off Palos Verdes Drive North, and the internal roads, including Rolling Hills Road, are private and unlit, so clear directions to your driveway help.

The housing here shapes how we design systems. Many homes are mid-century ranch houses on large lots, and equestrian properties often add barns, stables and tack rooms far from the main house. That spread is exactly where master keying helps: one structured system for the house and outbuildings instead of a drawer full of mismatched keys. The hilltop fog and salt air also take a toll on exterior hardware, so we check for corrosion before pinning new cylinders into tired locks.

We serve all of ZIP code 90274. If your property sits near the Flying Triangle landslide area or along the white three-rail fencing and bridle trails, we can still reach you. Call (323) 997-8867 and we will plan a visit around the gate procedures and your property layout.

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Other Rolling Hills locksmith services

See all of our Rolling Hills services, or our citywide master key system page.

Master Key System in Rolling Hills — FAQs

What is a master key system?
It is a set of locks arranged so each has its own key, while a higher-level master key opens several or all of them. A ranch owner might hold the master, while a caretaker's key opens only the barn and tack room.
Can you set up a system for a house, barn and tack room?
Yes. Horse properties are a good fit for master keying because the buildings are spread out and different people need different access. Call (323) 997-8867 to describe your property.
What is a restricted key system?
It uses a protected keyway so keys cannot be copied at ordinary key shops without authorization. That gives you real control over who can make duplicates, which matters when staff come and go.
Do you come to the gated community?
Yes. We are fully mobile and serve Rolling Hills 24/7. Let the gate security know to expect us. If you have questions about arranging the visit, call (323) 997-8867.
Can my existing locks be included?
Often, yes, if the cylinders are in good shape and compatible. Older or corroded hardware may need replacing, and we will tell you honestly which locks are worth keeping.
What happens when a caretaker or ranch-hand leaves?
With a master key system, you can rekey the affected locks so the old key stops working, without redoing everything. We also advise on retrieving and tracking keys.
Is a master key system less secure than separate keys?
It adds some complexity, and more levels create more theoretical weak points. A well-designed system with restricted keys and good key control is a practical, secure choice for many estates. We will explain the trade-offs.
How do I get started?
Call (323) 997-8867. We will talk through your buildings, who needs access and any existing hardware, then schedule a walk-through at your property.
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