Can you duplicate a car key in San Francisco if the original was stolen in a break-in?

Yes. If your car key was stolen during a break-in, we cut and program a replacement on-site at your vehicle's location — no tow required for most makes and models. For transponder-chip keys, proximity fobs, and push-button systems, we carry programming equipment for major domestic and import brands. We also recommend rekeying or replacing the affected lock cylinder if the break-in involved a forced door lock, since a new key alone doesn't secure a compromised cylinder.

What is a high-security key and why can't it be copied at a hardware store?

High-security keys — made by manufacturers including Medeco, Mul-T-Lock, and ASSA Abloy — use patented keyway designs and restricted blanks that are only available to authorized dealers. Hardware stores and generic kiosk machines don't carry these blanks and can't legally duplicate them. We are authorized dealers for these manufacturers, which means we can duplicate restricted residential and commercial keys and cut keys within existing master key hierarchies without breaking the system's security architecture.

Can you duplicate keys for the original lock hardware in a pre-1940 San Francisco home?

Yes. Victorian and Edwardian homes across SF neighborhoods including the Mission, Castro, Noe Valley, and Pacific Heights frequently use original Corbin or Sargent mortise cylinder hardware. These cylinders take non-standard key blanks that most locksmiths don't stock. We carry a wide range of legacy residential blanks and can duplicate keys for most original SF door hardware. If the cylinder is worn or the original key is too damaged to copy accurately, we can also rekey or replace the cylinder on the same visit.

Can you add keys to an existing commercial master key system without changing all the locks?

In most cases, yes. If the existing master key system uses a standard hierarchy and the locks are in good condition, we can cut additional keys that fit within the current structure. For restricted or proprietary keyways — common in FiDi office buildings and larger Union Square retail properties — we verify authorization before proceeding. Bring any documentation from the original installation if available. We don't expand master key systems in ways that compromise their access architecture.

How long does high-security key duplication take in San Francisco?

Standard key copies are typically ready in under 10 minutes. High-security residential keys (Medeco, Mul-T-Lock) take 15-30 minutes depending on the keyway. Commercial master key system keys require authorization verification, which may add time on a first visit — subsequent copies from the same system are faster. Automotive transponder key cutting and programming runs 30-60 minutes on-site. We cut and test every key before it leaves our hands.

Can you duplicate a car key in San Francisco if the original was stolen in a break-in?

Yes. If your car key was stolen during a break-in, we cut and program a replacement on-site at your vehicle's location — no tow required for most makes and models. For transponder-chip keys, proximity fobs, and push-button systems, we carry programming equipment for major domestic and import brands. We also recommend rekeying or replacing the affected lock cylinder if the break-in involved a forced door lock, since a new key alone doesn't secure a compromised cylinder.

What is a high-security key and why can't it be copied at a hardware store?

High-security keys — made by manufacturers including Medeco, Mul-T-Lock, and ASSA Abloy — use patented keyway designs and restricted blanks that are only available to authorized dealers. Hardware stores and generic kiosk machines don't carry these blanks and can't legally duplicate them. We are authorized dealers for these manufacturers, which means we can duplicate restricted residential and commercial keys and cut keys within existing master key hierarchies without breaking the system's security architecture.

Can you duplicate keys for the original lock hardware in a pre-1940 San Francisco home?

Yes. Victorian and Edwardian homes across SF neighborhoods including the Mission, Castro, Noe Valley, and Pacific Heights frequently use original Corbin or Sargent mortise cylinder hardware. These cylinders take non-standard key blanks that most locksmiths don't stock. We carry a wide range of legacy residential blanks and can duplicate keys for most original SF door hardware. If the cylinder is worn or the original key is too damaged to copy accurately, we can also rekey or replace the cylinder on the same visit.

Can you add keys to an existing commercial master key system without changing all the locks?

In most cases, yes. If the existing master key system uses a standard hierarchy and the locks are in good condition, we can cut additional keys that fit within the current structure. For restricted or proprietary keyways — common in FiDi office buildings and larger Union Square retail properties — we verify authorization before proceeding. Bring any documentation from the original installation if available. We don't expand master key systems in ways that compromise their access architecture.

How long does high-security key duplication take in San Francisco?

Standard key copies are typically ready in under 10 minutes. High-security residential keys (Medeco, Mul-T-Lock) take 15–30 minutes depending on the keyway. Commercial master key system keys require authorization verification, which may add time on a first visit — subsequent copies from the same system are faster. Automotive transponder key cutting and programming runs 30–60 minutes on-site. We cut and test every key before it leaves our hands.

High Security Key Duplication in San Francisco, CA

San Francisco creates a specific set of key duplication demands that general hardware stores and kiosk machines can't meet. The city's vehicle break-in rate drives constant automotive key replacement. Its pre-1940 housing stock runs on Corbin and Sargent mortise hardware that requires legacy blanks most locksmiths don't carry. Its commercial buildings — FiDi office towers, SoMa co-working spaces, Union Square retail — use restricted master key systems where unauthorized copying would break the entire access architecture.

A-A Lock & Alarm Inc. is an authorized dealer for Medeco, Mul-T-Lock, and ASSA Abloy — the three principal manufacturers of restricted high-security key systems — and carries the equipment and blanks needed for automotive, residential, and commercial key duplication across all San Francisco neighborhoods. Call (800) 422-5625 or contact us online.

Authorized dealer: Medeco · Mul-T-Lock · ASSA Abloy · Schlage Primus. We duplicate restricted keys that hardware stores cannot legally copy.

Close-up of a locksmith's hands carefully operating a key duplicating machine

Why Does San Francisco Drive So Much Automotive Key Demand?

San Francisco ranks among U.S. cities with the highest per-capita vehicle break-in rates. Most break-ins involve smashed glass, but a significant share result in key theft — and a stolen transponder key or FOB creates an immediate security problem that a replacement key alone doesn't fully solve.

We duplicate and program automotive keys on-site across all San Francisco neighborhoods, from SoMa parking structures to Outer Sunset residential streets:

Transponder key cutting and programming covers most domestic, and import makes from the past two decades
FOB key cloning and replacement including remote start and proximity systems
Push-button start key programming on-site at your vehicle's location — no tow required for most makes
Post-break-in lock cylinder assessment if the door lock or ignition was forced, a new key may not restore security without cylinder replacement

If your key was stolen rather than lost, we also recommend rekeying or replacing the affected lock cylinder on the same visit — a new key cut to the original profile doesn't prevent someone with the stolen original from using it. See our auto locksmith San Francisco page for the full range of post-break-in vehicle services.

What Key Duplication Services Do We Offer for San Francisco Residential Properties?

San Francisco's residential housing stock presents a key duplication challenge unique to the city. More than 60% of homes were built before 1960. Victorian flats in the Mission, Castro, Noe Valley, and Haight-Ashbury and Edwardian buildings across Pacific Heights, Richmond, and the Sunset frequently carry original Corbin or Sargent mortise cylinder hardware — a legacy system that uses non-standard key blanks most locksmiths and all hardware stores don't stock.

We carry legacy residential blanks for these systems and can duplicate keys for most original SF door hardware. For properties on modern high-security cylinders — Medeco, Mul-T-Lock, Schlage Primus — we are authorized dealers, meaning we can cut restricted keys legally and accurately without compromising the manufacturer's security architecture.

Restricted residential key duplication Medeco, Mul-T-Lock, ASSA Abloy, Schlage Primus — authorized copies only
Legacy mortise cylinder keys Corbin, Sargent, and other pre-1940 San Francisco hardware
Rekeying when duplication isn't the right call if the existing cylinder is worn or the original key too damaged to copy accurately, we can rekey or replace the cylinder on the same visit

Under California Civil Code Section 1942.5, landlords are required to rekey between tenancies. If you're a property manager in Nob Hill, Russian Hill, or anywhere else in San Francisco, we offer scheduled key duplication and rekeying programs tied to tenant turnover. See our residential locksmith San Francisco page for more.

How Do We Handle Commercial Key Duplication and Master Key Systems in San Francisco?

Commercial key duplication in San Francisco requires a different approach depending on the property type. FiDi office buildings and high-rise tenants typically run complex master key hierarchies where keys must fit within defined access levels — cutting a key outside the system's architecture defeats the entire security design. SoMa co-working spaces and tech campuses manage access across dozens of tenants with different permission levels. Union Square retail properties operate with high staff turnover and need tight key control.

We design, expand, and duplicate keys within existing commercial master key systems for properties across San Francisco's commercial districts. For restricted or proprietary keyways, we verify authorization before any duplication takes place — and we bring documentation of our authorized dealer status, so the process is auditable.

Master key system key duplication additional keys within existing hierarchies without compromising access architecture
Restricted commercial key cutting Medeco, Mul-T-Lock, ASSA Abloy for commercial applications
Cabinet, padlock, and mailbox keys for office common areas and multi-tenant commercial properties
Authorization verification required for restricted keyways — bring original installation documentation if available

For businesses considering an access control upgrade — moving from master key systems to electronic access — see our commercial locksmith San Francisco page.

Do You Also Provide Standard Key Duplication in San Francisco?

Yes. Beyond high-security and restricted systems, we cut accurate standard key copies for:

Residential house keys all common residential keyways
Office and commercial keys standard cylindrical and mortise key profiles
Padlock keys all common padlock manufacturers
Mailbox and cabinet keys for multi-unit residential and commercial properties

Every key we cut — standard or high-security — is inspected and tested before it leaves our hands. Unlike hardware store kiosks, we don't hand over a key that hasn't been verified to work in the lock it was cut for.

How Much Does Key Duplication Cost and How Long Does It Take?

Pricing and turnaround depend on the key type:

Standard residential or commercial key copy $5–$25 per key. Ready in under 10 minutes.
Legacy mortise cylinder keys (Corbin, Sargent) $15–$40 per key. Ready in 10–20 minutes.
High-security restricted keys (Medeco, Mul-T-Lock, ASSA Abloy) $25–$75 per key depending on keyway. Allow 15–30 minutes.
Automotive transponder key (cut only) $50–$100. Ready in 20–30 minutes.
Automotive transponder key (cut + programmed) $100–$250+ depending on make and model. Allow 30–60 minutes on-site.
FOB key cloning / replacement Varies by vehicle — quote provided before work begins.

Pricing note: We provide a firm quote before any work begins. If your key type requires specialized blanks we don't have in stock, we'll confirm availability before scheduling to avoid a wasted trip.

Frequently Asked Questions

Can you duplicate a car key in San Francisco if the original was stolen in a break-in?
Yes. If your car key was stolen during a break-in, we cut and program a replacement on-site at your vehicle's location — no tow required for most makes and models. For transponder-chip keys, proximity fobs, and push-button systems, we carry programming equipment for major domestic and import brands. We also recommend rekeying or replacing the affected lock cylinder if the break-in involved a forced door lock, since a new key alone doesn't secure a compromised cylinder.
What is a high-security key and why can't it be copied at a hardware store?
High-security keys — made by manufacturers including Medeco, Mul-T-Lock, and ASSA Abloy — use patented keyway designs and restricted blanks that are only available to authorized dealers. Hardware stores and generic kiosk machines don't carry these blanks and can't legally duplicate them. We are authorized dealers for these manufacturers, which means we can duplicate restricted residential and commercial keys and cut keys within existing master key hierarchies without breaking the system's security architecture.
Can you duplicate keys for the original lock hardware in a pre-1940 San Francisco home?
Yes. Victorian and Edwardian homes across SF neighborhoods including the Mission, Castro, Noe Valley, and Pacific Heights frequently use original Corbin or Sargent mortise cylinder hardware. These cylinders take non-standard key blanks that most locksmiths don't stock. We carry a wide range of legacy residential blanks and can duplicate keys for most original SF door hardware. If the cylinder is worn or the original key is too damaged to copy accurately, we can also rekey or replace the cylinder on the same visit.
Can you add keys to an existing commercial master key system without changing all the locks?
In most cases, yes. If the existing master key system uses a standard hierarchy and the locks are in good condition, we can cut additional keys that fit within the current structure. For restricted or proprietary keyways — common in FiDi office buildings and larger Union Square retail properties — we verify authorization before proceeding. Bring any documentation from the original installation if available. We don't expand master key systems in ways that compromise their access architecture.
How long does high-security key duplication take in San Francisco?
Standard key copies are typically ready in under 10 minutes. High-security residential keys (Medeco, Mul-T-Lock) take 15–30 minutes depending on the keyway. Commercial master key system keys require authorization verification, which may add time on a first visit — subsequent copies from the same system are faster. Automotive transponder key cutting and programming runs 30–60 minutes on-site. We cut and test every key before it leaves our hands.

Need a Key Duplicated in San Francisco? Call A-A Lock & Alarm.

From a spare house key for a Noe Valley flat to a restricted Medeco key for a FiDi office building to a transponder replacement after a SoMa break-in — A-A Lock & Alarm Inc. has been handling key duplication across San Francisco for over 60 years. Authorized dealer. Every key tested before handoff.

Call (800) 422-5625 for same-day service — or contact us at aalock.com/locksmith-shop-location to schedule a non-emergency appointment.