A master key system lets each person open only the doors they need, while owners and managers carry one key for everything. We plan, supply and fit master key systems for Sheffield businesses, landlords, HMOs and managed buildings, usually by replacing only the cylinders so your doors and handles stay as they are.
- Planned around your building
- Restricted keys
- Expandable later
The basics
How a master key system works
Master key
Opens every door in the system – for owners and managers.
Sub-master keys
Open a group of doors, such as one floor or department.
User keys
Open only their own door, such as one office or one flat.
Keyed-alike groups
Several doors opened by the same key, such as all external doors.
Restricted profiles
Keys that cannot be copied without authorisation.
Room to grow
New doors can usually be added to the system later.
Who uses master key systems?
- Offices and shops – staff open their own areas; managers open everything.
- HMOs and student houses – each tenant has their room and the front door; the landlord holds a master.
- Blocks of flats – residents open their flat, the communal doors and the bin store.
- Workshops and units – separate keys for stores, offices and yards.
How we set it up
- Survey. We list every door, who needs access and which locks you have.
- Plan. We design the key hierarchy and confirm the price.
- Fit. Cylinders are replaced door by door and tested.
- Keys and records. Keys are labelled and handed over with a simple chart of who opens what.
Restricted keys explained
A standard key can be copied at almost any key cutter. A restricted key uses a special profile that only authorised suppliers can cut, and only when the registered keyholder asks for it, usually with a key card or signature. That means you always know how many keys exist and who has them – which matters when staff leave or tenants move out.
For most master key systems we recommend a restricted profile. It costs a little more at the start but saves re-keying later, because lost or unreturned keys are far less likely to have been copied.
More master key questions
How many levels can a system have?
Most buildings need two or three: master, sub-master for areas, and individual user keys. Larger sites can have more.
Can the master key open the front door too?
Yes. External doors can be keyed to work with every user key as well as the master.
What affects the price
Every job is priced before we start. The main things that change the price are the type of lock or mechanism, the security grade you choose, how many doors are involved and the time of day. See our locksmith prices for starting prices, or call 0114 463 0063 for a fixed quote.
Master key FAQs
Do I need new doors or handles?
Usually not. In most cases only the cylinders are replaced.
Can more doors be added later?
Usually yes, if the system is planned with room to grow.
What happens if someone loses a key?
The affected cylinders can be re-keyed without replacing the whole system.
Can keys be copied?
With a restricted profile, copies can only be made with your authorisation.