The most important part of setting up a master key system happens before any locksmith arrives: deciding how access should actually be structured across your business. Getting this planning right makes the eventual installation straightforward and the system genuinely useful day to day.
Start by Listing Every Door
Before thinking about who needs access to what, make a simple list of every door the system might cover: main entrances, internal office doors, storage rooms, staff-only areas, equipment rooms, and any other space with a lock. It is easy to overlook secondary doors that are used less often but still matter for a complete system.
Involve the People Who Actually Use Each Door
A plan drawn up entirely from a management perspective can miss practical details that only become obvious to the people using a door every day. A quick conversation with department heads or long-serving staff about which doors they actually use, and how often, can reveal access needs that would not be obvious from an office layout alone, such as a storage door that is used far more frequently than its location on a floor plan would suggest, or a meeting room that rarely needs restricted access despite initially seeming sensitive.
Group Doors by Purpose, Not Just Location
Rather than thinking purely in terms of floors or physical layout, consider grouping doors by function: general staff areas, management-only areas, storage and stock rooms, and any specialist spaces such as a server room or cash handling area. This functional grouping usually maps more naturally onto who actually needs access than a purely physical layout would.
Define Your Access Tiers
Most businesses find two to four tiers sufficient. A simple structure might look like: general staff with access only to their immediate work area, supervisors or department heads with access to their full department, and owners or senior management with access to everything. Larger operations sometimes add an additional tier for specific specialist roles, such as a facilities or security team that needs broad access without full management-level authority.
A Quick Checklist Before Your Visit
A short list to work through before the technician arrives: every door noted, doors grouped by function, a rough tier structure sketched out, any areas you want kept outside the system identified, and a general sense of how you expect to handle contractors or temporary staff. None of this needs to be finalized, but arriving at the conversation with these basics already considered makes the planning discussion far more productive and helps the visit move efficiently from assessment to a concrete recommendation.
Identify Any Areas That Should Sit Outside the System
Not every door needs to be part of the master key structure. Highly sensitive areas, a server room, a cash office, or specific restricted storage, are often better kept on an entirely separate lock outside the master system, so that even the top-level master key does not automatically grant access. Deciding this in advance avoids having to retrofit an exception later.
Think About Future Staff Changes
Access needs change as people join, leave, or move between roles. Planning tiers around roles rather than named individuals makes this easier to manage over time, since a new hire simply receives the key associated with their role rather than requiring a bespoke access decision each time someone joins the team.
Consider Contractors, Cleaners, and Temporary Access
If your business regularly works with cleaning staff, maintenance contractors, or other temporary personnel, decide in advance how their access should be handled. Some businesses issue a limited-tier key covering only common areas, while others prefer to schedule these visits during hours when a staff member can provide access directly, avoiding an additional key in circulation altogether.
Documenting the Plan, Even Informally
Once you have worked through doors, groups, and tiers, writing it down, even in a simple table or spreadsheet, makes a real difference later. This document does not need to be sophisticated. A basic list of each door, which tier it belongs to, and which roles hold that tier's key is usually enough to keep the system understandable as your business grows and staff turn over, and it becomes the reference point for future decisions about where new doors or new roles should fit into the existing structure.
Bringing Your Plan to the Locksmith Visit
Once you have a rough structure in mind, even a simple written outline of doors, groups, and proposed tiers, this gives our technician a clear starting point to assess your existing hardware and confirm what is practically achievable. It is normal for this plan to be refined further once the technician has reviewed the specific doors and locks involved.
Revisiting Your Plan Periodically
Even a carefully planned structure benefits from an occasional review, particularly after significant growth, a change in premises, or a shift in how different areas of the business are used day to day. Treating the plan as a living reference rather than a one-time document makes it far more useful over the years than something drawn up once and never revisited.
Getting Started
If you are ready to plan a master key system for your business, see our main commercial master key system setup page for more on how the full process works, from planning through to installation.
Reviewing the Plan With Fresh Eyes
If possible, it can help to have a second person within the business review the draft plan before the locksmith visit, since a fresh perspective often catches an overlooked door or an access assumption that seemed obvious to the person who drew it up but is not quite right in practice.
Frequently Asked Questions
Do I need a formal written plan before calling a locksmith?
No, but even a rough outline of your doors and who needs access to each helps the visit go more smoothly and reduces back-and-forth during planning.
What if I am not sure how many tiers my business needs?
This is a normal part of the conversation with our technician, who can suggest a sensible structure based on your business size and layout.
Should every sensitive area be excluded from the master key system?
Not necessarily every sensitive area, but it is worth specifically identifying any space where you want access limited even from the top-level master key, and discussing this during planning.
