Master Key System
$150 - $500 | 1-3 hours | Available 24/7
A master key system lets one key open every lock while individual keys only open their own door. We design and pin the system on-site for $150-$500 depending on the number of locks. Great for multi-unit properties and large homes.
How Does a Master Key System Work?
Each lock has two shear lines instead of one. The individual key matches one shear line (opens only that door). The master key matches the second shear line (opens every door). It's done by adding a tiny pin (called a master wafer) between the key pins and driver pins.
You don't need new locks. We repin your existing cylinders to work with the master key system. Same hardware, different pin configuration.
Who Uses Master Key Systems at Home?
Landlords, property managers, large homes, and multi-unit buildings. If you own a duplex, triplex, or small apartment building, a master key system means each tenant has their own key but you can access any unit with one master key for maintenance and emergencies.
We also set these up for large homes where the homeowner wants one key for all exterior doors but different keys for the home office, wine cellar, or gun room. According to the Master Locksmiths Association, roughly 30% of residential master key requests come from homeowners, not just landlords.
Common Questions
How much does a master key system cost?
$150 for a basic 3-4 lock system. $300-$500 for larger properties with 8-15 locks. We price per lock after the initial setup fee. Volume discounts available for property managers.
Can you add new locks to an existing master key system?
Yes. We document the pin chart when we set it up. New locks get pinned to match the system. Just call us when you add a door.
Is a master key system less secure than individual keys?
Slightly, in theory. The extra shear line creates an additional manipulation point. In practice, the difference is negligible for residential applications. A determined attacker has easier methods than exploiting master pins.
Can you master-key smart locks?
Smart locks with physical keyways (like Schlage Encode) can be part of a master key system. The keypad codes stay individual. The physical key override follows the master key chart.
How long does it take to set up a master key system?
1-3 hours depending on the number of locks. A 4-lock residential system takes about an hour. A 12-unit apartment building takes 2-3 hours.
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(561) 524-8500