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Crenshaw Lock

Master Key System in Gardena · 24/7 mobile

Master Key System in Gardena, California

Crenshaw Lock Company designs and installs master key and restricted key systems with real key control for Gardena apartment buildings, retail centers, offices and card-club properties. We are a fully mobile locksmith, available 24/7, and we come to you. Call (323) 997-8867 to plan your system.

  • Mobile to your Gardena 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 doors while each door still has its own individual key. That sounds simple, but a poorly planned system is how a property ends up with a manager carrying a ring of thirty keys, former tenants who still have access, and no record of who holds what. In Gardena, where a single owner might manage a 1960s dingbat apartment building off Western Avenue, a strip of retail suites on Redondo Beach Boulevard, and a small office on Normandie, the right system saves a lot of daily frustration.

Crenshaw Lock Company has served Greater Los Angeles and Ventura County since 1987, and owner and lead technician David Shar has worked on everything from tired mid-century apartment hardware to commercial storefront doors. We are mobile only, with no storefront to visit. We meet you at the property, walk the doors, and talk through who needs access to what before any cylinder is touched.

A good system is designed on paper first. We map the hierarchy: individual keys, group or floor keys, a manager or maintenance master, and where appropriate a grand master. We then pick the right key control level, from a standard keyway to a restricted keyway where duplication requires authorization, so you decide who can make copies rather than any hardware store counter.

How it works in Gardena

  1. 1

    Walk the property and list every door

    We visit the building, whether it is a multi-unit apartment complex, an office, or a commercial strip, and note every door, existing cylinder type, and condition. Older mortise locks, worn deadbolts, aluminum storefront doors and panic hardware each affect what the system can use.

  2. 2

    Define who needs access to what

    We talk through your people: tenants, on-site manager, maintenance, cleaning crews, owners, and any vendors. From that we draft a key hierarchy so each person carries the fewest keys needed and no more.

  3. 3

    Choose the keyway and level of key control

    We explain the difference between a conventional keyway and a restricted one where duplication is controlled. We recommend what fits your risk, turnover, and budget, and you approve the plan before work begins.

  4. 4

    Pin the cylinders and install

    We rekey existing hardware where it is sound and replace cylinders or locks that are too worn to hold a master system reliably. Each lock is pinned to the plan, installed, and tested with its change key and every master key above it.

  5. 5

    Test, label, and record

    We confirm every key operates only what it should and that keys do not cross over to doors they should not open. We hand over a key schedule so you can track who holds which key.

  6. 6

    Plan for turnover and growth

    Tenants move and tenants change. We show you how a unit can be rekeyed later without breaking the master system, and how to add doors or tiers down the road.

Need master key system in Gardena?

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What affects the price

  • The number of doors and cylinders included in the system, since each one must be pinned to the plan.
  • The key hierarchy you want: a simple change-key and master arrangement is less involved than multiple tiers with a grand master.
  • Whether you choose a restricted keyway with duplication control or a standard keyway.
  • The condition of existing hardware: sound locks can often be rekeyed, while worn deadbolts or failing mortise cylinders may need replacing.
  • The mix of door types, such as residential deadbolts, commercial mortise cylinders on aluminum storefront doors, and panic hardware.
  • How many keys you need cut at the start and whether you want after-hours scheduling.

Why Gardena chooses us

  • Fully mobile service: we come to your Gardena property, so there is no shop trip and no leaving doors unsecured.
  • Operating since 1987, with the owner, David Shar, involved in the work rather than handing it entirely to strangers.
  • Design before drilling: we build the key hierarchy with you on paper so the system matches how your property is really used.
  • Experience across old and new hardware, from worn mid-century apartment deadbolts to commercial storefront mortise cylinders.
  • A clear key schedule left with you, so access is documented rather than living in someone's memory.
  • Available 24/7, which matters when a lock fails on a commercial door and the property cannot sit open overnight.

Master Key System across Gardena

Gardena's building stock makes master key work varied. Along Western Avenue, Normandie and Vermont you will find 1950s and 60s stucco apartments and dingbat buildings, where high tenant turnover and heavily worn deadbolts are the norm. A property manager there might need several units rekeyed between tenants and keyed alike for the on-site manager, which is exactly the situation a master key system is built for. In quieter residential areas like Moneta and Strawberry Park, we see 1920s to 40s bungalows and Craftsman cottages, where original mortise hardware sometimes needs careful handling.

The commercial side is just as distinct. The Redondo Beach Boulevard retail strip, small offices around Rosecrans, and the card-club corridor, including properties near Hustler Casino and the former Normandie Casino, call for higher-grade hardware and reliable after-hours service. Storefront aluminum doors with mortise cylinders and panic hardware are common, and a system there needs to keep staff, owners and vendors on the right tiers of access. We work across ZIP codes 90247, 90248 and 90249, including properties near Alondra Park and El Camino College.

Because Gardena sits right off the I-110 Harbor Freeway, we reach properties across the city and nearby communities without a storefront detour. Call (323) 997-8867 any hour and we will schedule a walkthrough to plan your system.

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Other Gardena locksmith services

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

Master Key System in Gardena — FAQs

What is a master key system?
It is a set of locks arranged so that each door has its own key, while higher-level keys, such as a manager's or maintenance master, open multiple doors. It reduces key rings and keeps access organized. Call (323) 997-8867 to discuss a layout for your property.
Can you set up a master system for an older Gardena apartment building?
Often yes. Many mid-century buildings have worn deadbolts, so we rekey sound hardware and replace anything too worn to hold a system reliably. We assess each door during a walkthrough before recommending a plan.
Can the on-site manager have one key that opens every unit?
Yes. That is a common setup for properties off Western Avenue and Normandie. Each tenant keeps a key for their own unit only, and the manager's master key opens all of them. We can also add a separate key for shared areas.
What is a restricted keyway and do I need one?
A restricted keyway uses a key blank that is not freely sold, so copies must be authorized. It suits properties with high turnover or sensitive areas. We will explain whether it is worth it for your situation. Call (323) 997-8867 with questions.
Can you work on storefront doors and panic hardware?
Yes. We service aluminum storefront door mortise cylinders and panic hardware for Gardena retail tenants, offices, and card-club properties, and can integrate them into a master system. We are available 24/7 for after-hours work.
What happens when a tenant moves out?
A well-designed system lets us rekey just that unit's cylinder to a new change key without disturbing the master arrangement. Your manager's master key keeps working while the old tenant's key stops.
Do you have a shop I can visit?
No. We are fully mobile and come to your property in Gardena. That means we see your actual doors and can tailor the system to them.
Can I add doors to the system later?
Generally yes, as long as the system was planned with room to grow. We keep a record of your key hierarchy so additions can be pinned to match, and we will tell you if any change would compromise the system.
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