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(323) 997-8867
Crenshaw Lock

Key Duplication in San Marino · 24/7 mobile

Key Duplication in San Marino, California

Crenshaw Lock Company provides fully mobile key duplication in San Marino, California, available 24/7. We cut and copy house, office, mailbox and restricted keys at your home or property, with no storefront trip. Call (323) 997-8867 to talk with a locksmith about the keys you need copied.

  • Mobile to your San Marino location
  • Available 24/7
  • Price quoted before we start
Call (323) 997-8867or tap to call — we answer 24/7
Key cutting machine duplicating a brass key
Open now(323) 997-8867

Copying a key sounds simple until the key belongs to a 1920s period-revival home. In San Marino, many houses still carry original mortise hardware, solid-wood doors, and a mix of older and newer cylinders installed over the decades. A worn, tired key copied from another worn copy often binds in the lock, and a poor copy can damage a cylinder that has served a household for generations. We cut keys on location, so we can test each new key in the actual lock it is meant to operate.

Crenshaw Lock Company is fully mobile and has served Greater Los Angeles and Ventura County since 1987. There is no shop to visit. Our locksmith comes to your home, your office, or wherever the keys are, and does the work there. That matters for San Marino properties with several exterior doors, side and garden gates, a pool house, a mailbox, and perhaps a safe, all on different keys that have accumulated over the years.

Duplication is also a good moment to take stock. If you are copying keys for a new housekeeper, a gardener, a contractor, or a family member, it is worth asking whether those keys should open everything or only one door. We will talk through the options plainly and let you decide, whether that means simple copies or a tidier, more secure key arrangement.

How it works in San Marino

  1. 1

    You call and describe the keys

    Call (323) 997-8867 any hour. Tell us what you need copied: house keys, gate keys, a mailbox key, an office key, or something stamped with a restricted keyway. A few details about the locks help us bring the right blanks and equipment.

  2. 2

    We come to your property

    Because we are fully mobile, the locksmith drives to your San Marino home or business with cutting equipment and a range of blanks. Nothing needs to be dropped off, and your originals never leave your sight.

  3. 3

    We inspect the original key and the lock

    Before cutting, we look at the condition of your original. Heavily worn keys, bent keys, and keys copied several generations deep can produce poor duplicates. If the lock itself is the problem, such as an aging mortise cylinder, we will say so.

  4. 4

    We identify the keyway and verify what can be copied

    Standard keys can be duplicated directly. Restricted or patent-protected keyways usually require authorization, and we will explain what that involves rather than skip it. Some keys marked do-not-duplicate still have legitimate routes to a copy through the proper owner.

  5. 5

    We cut and test on location

    Each copy is cut, deburred, and tested in the lock it belongs to. We check that it enters smoothly, turns without force, and retracts the latch or bolt cleanly. If a copy is stiff, we correct it before you pay for it.

  6. 6

    We review your key setup with you

    Once the copies work, we can discuss whether any doors should be rekeyed so a single key operates multiple locks, or whether limited-access keys make sense for staff and service providers.

Need key duplication in San Marino?

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

Call (323) 997-8867

What affects the price

  • The type of key: a standard house key, a mailbox key, a high-security or restricted key, and a specialty key each involve different blanks and effort.
  • The number of keys needed, and whether several locks, such as exterior doors, gates and outbuildings, are being handled in the same visit.
  • The condition of the original key, since a worn or damaged original may need extra fitting, or may call for a new key made by another method.
  • Whether a restricted keyway requires authorization or verification of ownership before a copy can be made.
  • The time of day or night you call, as we are available 24/7 and after-hours service is handled differently from a scheduled daytime visit.
  • Whether the lock needs service, such as cleaning or repair of an aging mortise cylinder, so the new key works smoothly.

Why San Marino chooses us

  • Fully mobile service means the work happens at your property. There is no storefront, and your keys and locks stay with you.
  • Each duplicate is tested in the actual lock, not just checked against the original, which catches binding before it becomes a problem.
  • We are comfortable with period hardware, including original mortise locks and vintage brass, and we aim to preserve it rather than replace it by default.
  • We have served Greater Los Angeles and Ventura County since 1987, and the owner, David Shar, leads the work.
  • We will tell you honestly when a key is too worn to copy well, or when a restricted key needs proper authorization.
  • Available 24/7, so a lost or needed key does not have to wait for business hours.

Key Duplication across San Marino

San Marino is almost entirely residential, and the housing tells you what kind of key work comes up. Around the Huntington Library district, large Spanish Colonial, Tudor and Georgian estates from the 1920s and 1930s often keep their original mortise hardware and heavy wood doors. Copying keys for these locks calls for care, and we treat the vintage brass and the lock bodies as something to protect. In the Lacy Park neighborhood, we often see owners layering high-security cylinders, safes and discreet smart-lock systems onto older homes, which means several different key types on one property.

A typical San Marino job might involve a household with a front door, a service entrance, side and garden gates, and a mailbox, each with its own key. We can copy the full set in one visit at the property, anywhere from streets off Huntington Drive to homes near Sierra Madre Blvd, San Gabriel Blvd, Del Mar Ave or Los Robles Ave. If you are in ZIP code 91108, we come to you.

The modest commercial strip along Huntington Drive and the Mission Street area, near the Mission District, has small offices and shops that need office and storefront keys duplicated too. Whether you live near Lacy Park, El Molino Viejo, or the Crowell Public Library, call (323) 997-8867 and we will come to wherever the keys are.

Locked out or need a locksmith now?

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

Call (323) 997-8867

Other San Marino locksmith services

See all of our San Marino services, or our citywide key duplication page.

Key Duplication in San Marino — FAQs

Can you copy keys at my San Marino home?
Yes. We are fully mobile and cut keys on location at your house, office or other property. There is no storefront to visit. Call (323) 997-8867 to arrange it.
Do you offer key duplication at night or on weekends?
Yes, we are available 24/7. Call (323) 997-8867 whenever you need a key copied, and we will work out the visit with you without making timing promises we cannot keep.
Can you copy keys for the original mortise locks on an older home?
Often, yes. Many 1920s and 1930s San Marino homes have original mortise hardware. We test each copy in the lock and will tell you if the cylinder is worn enough that service or rekeying would be a better choice.
What about keys marked Do Not Duplicate?
That marking is not always a legal barrier, but restricted keyways usually require authorization. We will explain what is needed and what we can do once ownership is verified.
Can you copy a mailbox key?
Yes, we duplicate mailbox keys along with house and office keys. Bring the original or have it ready when we arrive, and we will cut and test the copy on location.
My original key is badly worn. Will a copy still work?
Possibly not well. A copy of a worn key inherits its wear. We will inspect it and suggest a better route, which could mean a cleaner copy method or rekeying the lock to a fresh key.
Should I rekey instead of just copying keys?
If you have lost a key, had a staff change, or are unsure who holds copies, rekeying is usually wiser. We can re-pin several locks to one key, including gates. Call (323) 997-8867 to talk it over.
Do you serve all of San Marino?
Yes, including ZIP code 91108 and neighborhoods such as the Huntington Library district, Lacy Park and the Mission District along Huntington Drive.
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