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At Mersey Locksmiths, we're here you - the customer. We'll listen to your requirements and provide a solution. We design, supply, and fit bespoke master key systems which are both secure and scalable. We do this for the likes of:​
Commercial
Staff access by department or level
Care homes
Clinical, patient and public areas
Housing groups
Landlord and tenant separation
FM companies
Access tiered by role
Hotels
Guest rooms, staff-only, admin zones
High quality cost effective and customisable locking solutions
At Mersey Locksmiths, all our master key systems are designed and built in house using quality cylinders from the world's leading manufacturers. We don't sell off the shelf Chinese made master key systems. These can't be customised and have no room for expansion and they're also no cheaper than our systems.
We offer ongoing support and supply. All our systems are unique to each customer and each customer has a unique system number without duplication.
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Maximum control
Master keyed suites often have sub-suites, allowing you to have full control over who is allowed entry to any given area. Most master key systems provide the option to create a hierarchy system, whereby certain people can gain access to every area while others are given sub-keys to restrict them to a select few.
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Examples of this could be seen in a small hotel where the hotel manager has a master key to open all doors, and cleaning staff have a sub-master to open a range of bedroom doors but none of the offices, for instance. The guest keys can only open the main door and their individual rooms. This is an example of a basic system.
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A cost effective choice
While the price of your chosen system will depend on a range of factors, cost is bound to be important. A master key system is usually less expensive than an electronic alternative. Electronic key cards can be very expensive to install and manage.
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Don't let the fact they're less expensive fool you into thinking they're not as reliable or secure, though. This is simply not true. Master key systems are regarded as being one of the best access systems around thanks to the variety of options on offer and how much less expensive they are in comparison to other options like electric key cards. If you have a limited budget, then a master key system is the perfect choice.
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Mersey Locksmiths in action: one key to three buildings
A Liverpool-based care provider managing three properties was juggling 60+ keys. Staff often carried the wrong set, causing delays.
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We installed a 3-tier master key system: grand master for management, sub-masters for teams, and individual door keys for rooms. The outcome?
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Staff reduced multiple keys to just one
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Emergency access secured
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Zones clearly defined
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"It's a game changer for how we manage access - safer and so much simpler."
- Ops Manager, North West Care Group
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Why choose Mersey Locksmiths for your master key systems?
We know you want to feel confident, safe and reassured when you come to your master key system. That's exactly what we're here for.
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In-house system design - no third-party kits
We design every master key system ourselves - no outsourced templates or pre-boxed kits. That means tighter security, better compatibility, and a system built specifically for your site.
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Fully customised for your site - no duplication or generic keys
Your system is built from scratch with a unique code - no shared keyways, no duplication risk. Everything is tailored to your layout, team, and access needs.
Built with expansion in mind - future-ready structure
As your business grows, your system adapts. Our setups are modular and scalable, so adding new doors or buildings won't mean starting over.​
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Support you can rely on - maintenance, audits, replacements
We stay with you after installation. From lost keys to system updates, we offer fast, expert support to keep your site secure and running smoothly.
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Trusted, qualified, local experts
We're CORGI Fenestration Skilled Locksmiths(âžš) and City & Guilds(âžš) accredited. Our technicians carry ID cards and are DBS(âžš) checked. We're fully insured and provide a professional and efficient master key system service for your business across Merseyside, Cheshire and West Lancs.
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Our process: from survey to support
1. Consultation: On-site assessment of premises, usage, door types, and security concerns
2. System design: Key hierarchy is mapped, cylinders selected, and key access levels structured
3. Installation: Our expert engineers supply and fit all cylinders - no sub-contractors
4. Documentation: You receive key schedules, unique system ID, authorised key holder lists
5. Ongoing support: Lost keys? Expansion? We're here for the lifetime of the system​
Last updated: 16 October 2025