Grosvenor Access Control Solutions

Grosvenor access control lets UK organisations centrally manage doors, users, credentials and security events. JanusC4 is Grosvenor Technology’s current platform for new installations and major upgrades.

For sites with older Janus or Sateon systems, the main decision is often whether to maintain, expand or migrate. Compatible hardware can sometimes be retained, so full replacement is not always necessary.

i2 Security & Fire Protection installs, supports and upgrades Grosvenor systems. This guide explains the products, features, migration options, costs and alternatives so you can decide what fits your site.

What Is Grosvenor Access Control?

Grosvenor access control is a commercial access control solution that manages physical access across buildings and sites.

It helps organisations control doors, users, credentials, access rights, alarms and system events from a central software platform.

This gives administrators one place to manage access and review events across the site.

What Can a Grosvenor Access Control Solution Do?

Grosvenor access control can manage users, doors, permissions and site activity. JanusC4 can also connect with other security and building systems.

Grosvenor access control can operate across a single building or multi-site estate. Its modular hardware can scale as requirements grow.

A user presents a card, fob, mobile credential or biometric to a reader. The controller checks their access permissions, grants or denies entry and records the event.

How Does Grosvenor Manage Users, Doors and Access Permissions?

JanusC4 lets administrators control who can enter specific doors and areas and when each user can enter.

Permissions can be set by role, changed as responsibilities change and removed when someone leaves. JanusC4 can also integrate with Microsoft Active Directory and supports comma-separated values (CSV) uploads for bulk user changes.

JanusC4 can restrict administrator permissions, so authorised end users only see and control the system areas they need.

What Monitoring and Site Management Features Are Available?

JanusC4 gives operators a central view of access events, alarms and connected systems, supporting day-to-day security management.

Graphical floorplans show real-time site activity, and automation rules can trigger actions when certain events occur. For example, it can set the intruder alarm when the last authorised person leaves. It can also send occupancy information to a building management system.

JanusC4 keeps user records and an audit trail in one place. Operators can use that information during incident response and multi-site management.

What Integration Options Does Grosvenor Access Control Support?

JanusC4 can connect with CCTV, intruder alarms, wireless locks, lifts, building management systems, Active Directory and biometrics.

Supported integrations include Milestone XProtect, Avigilon, Hikvision and Dahua for video, Galaxy and Texecom for intruder alarms, and ASSA ABLOY Aperio for wireless locking.

With Milestone XProtect, operators can view access events alongside video and manage doors from the same browser or dashboard. Cardholder information is available there too.

Compatibility depends on the products, software versions and site setup. Check this with i2 before ordering or installing equipment.

What Credential and Reader Options Does Grosvenor Support?

JanusC4 supports cards, key fobs, mobile credentials and biometrics through compatible readers. It also supports contactless access using technologies such as Bluetooth, near-field communication (NFC) and proximity.

JanusC4 works with reader technology from HID, Third Millennium, STiD and IDEMIA. It can also support some older low-frequency cards and fobs where compatible.

Compatible readers can use Open Supervised Device Protocol (OSDP) for secure reader-to-controller communication. Where supported, the same site can use more than one identification method.

Choose credentials to match the site’s risk level and how people use the building.

Those functions span several Grosvenor products, each with a different role.

What Are Grosvenor's Core Access Control Products and Systems?

Grosvenor’s core access control products are JanusC4, Sateon Advance and Advance Hardware. Some existing sites still use older Janus and Sateon systems.

JanusC4

JanusC4 is Grosvenor Technology’s current browser-based access control platform for new installations and major upgrades.

JanusC4 is the software platform, not a controller. Grosvenor Advance Hardware provides the door controllers.

Its scalability supports smaller commercial buildings and larger multi-site estates.

For most UK buyers planning a new Grosvenor system, JanusC4 is the main platform to consider.

Sateon Advance

Grosvenor Technology’s Sateon Advance platform supports existing sites needing maintenance, expansion or eventual migration to JanusC4.

Advance Hardware

Advance Hardware is Grosvenor’s modular controller hardware. It connects the access control software to doors, readers, locks and other inputs and outputs.

The range includes:

Multi-door controllers
Single-door controllers
Door blades
Input and output blades
OSDP reader blades

Your existing controller hardware affects how you plan maintenance, expansion or an upgrade.

The diagram below shows how an Advance Hardware controller links JanusC4 software with a compatible reader and door lock.

Diagram: Simplified relationships between JanusC4 software, the controller, reader and door lock. This is not a wiring diagram. Equipment and connections depend on the installation.

Legacy Janus and Sateon Systems

Legacy Janus and older Sateon systems still operate in some UK buildings.

Sateon access control software was an earlier Grosvenor platform, before Sateon Advance and the current JanusC4 platform.

Assess legacy systems thoroughly before replacing them. Your options depend on the hardware and software your site already uses.

Product choice also depends on whether Grosvenor suits the site’s size, risk profile and day-to-day use.

Is Grosvenor Access Control Right for Your Site?

Grosvenor access control suits commercial, public-sector and multi-door sites that need central management or integrations. It also suits sites upgrading an existing Grosvenor system.

Which Sites Does Grosvenor Access Control Suit Best?

Grosvenor is best suited to sites with several doors, user groups, or integrations to manage.

Typical examples include:

Offices and commercial buildings with staff, visitor and contractor access needs
Schools, colleges and universities with several user groups and restricted areas
Healthcare sites with staff-only zones, records, medicines, patients and service areas to protect
Warehouses, industrial sites and manufacturing facilities with controlled operational areas
Public-sector buildings that need a clear audit trail and managed permissions
Larger residential estates or mixed-use buildings where basic access control is not enough
Sites that already use Janus, Sateon, Sateon Advance or other Grosvenor equipment
Multi-building estates where access control needs to work with other security or building systems

Grosvenor is most useful where permissions change regularly, or teams must monitor doors and manage several buildings or systems together.

If Grosvenor fits the site, the next question is whether its advantages outweigh its limits.

What Are the Pros and Cons of Grosvenor Access Control?

Grosvenor access control works particularly well for existing Grosvenor estates and sites that need central management, but simpler systems may suit smaller installations better.

Pros of Grosvenor Access Control

Grosvenor is particularly useful for sites that already use Janus, Sateon or Sateon Advance
You can retain some existing Grosvenor equipment during a move to JanusC4 where it remains compatible
JanusC4 suits multi-door and multi-site buildings that need central management
JanusC4 can connect with CCTV, intruder alarms, wireless locks, lifts and other building systems
Grosvenor’s modular controllers can expand as site requirements change

Cons of Grosvenor Access Control

JanusC4 can support smaller sites, but a simpler system may suit a small office, shop or single door better
Check the installed hardware and software before planning an upgrade, because compatibility affects the available options
Sateon Advance is no longer being developed, so new installations should normally be based around JanusC4

For sites already using Grosvenor, one of the biggest advantages is that an upgrade does not always mean starting again.

Can You Upgrade or Migrate an Existing Grosvenor System?

You can expand or upgrade many existing Grosvenor systems or migrate them to JanusC4. Your options depend on the software and hardware your site already uses.

Grosvenor provides migration tools for moving legacy systems into JanusC4. The exact route depends on the installed hardware.

Can Sateon Advance Migrate to JanusC4?

Sateon Advance can migrate to JanusC4, but the route depends on the controllers your site already uses.

You can upgrade Sateon Advance C2 controllers for use with JanusC4. Sites with older C controllers must replace them with C2 hardware first.

Grosvenor’s migration tools can also transfer user information and system data, reducing the amount of rebuilding needed during the move.

Can You Reuse Existing Controllers, Readers and Cabling?

Yes. Compatible Sateon Advance C2 controllers, readers and cabling can remain in place during a JanusC4 migration.

You can also retain existing cards and fobs where they remain compatible and suitable for the site. Keeping compatible equipment can cut installation work and avoid unnecessary replacement. That may also reduce disruption and cost.

When Should You Maintain, Expand or Replace an Existing Grosvenor System?

Maintain the existing Grosvenor system if it is reliable and still meets the site’s needs. Expand Sateon Advance if you can add more doors or users without major compatibility issues. Move to JanusC4 when you need newer features, integrations or a platform with a longer-term development path.

Existing Sateon Advance installations can still support expansion, although Grosvenor no longer develops the platform. Expansion can still make sense if the existing system remains suitable and there is no immediate need for JanusC4 features.

JanusC4 is more relevant when the site needs newer features, integrations or a platform Grosvenor is still developing. Older controllers or other incompatible equipment may need replacement before a move to JanusC4.

The first step is to identify the software, controllers, readers, cabling and integrations already in place. i2 Security & Fire Protection can inspect your existing system and help you decide whether to maintain, expand, or migrate it.

Migration planning and pricing are closely linked because keeping suitable controllers, readers, or cabling can reduce the new equipment and installation work needed.

How Much Does Grosvenor Access Control Cost?

Grosvenor access control costs vary by site rather than following a fixed package price.

Cost depends mainly on the number of doors, readers, controllers and locks. It also depends on cabling, software, integrations, commissioning, support and the existing equipment you can retain.

A clear quote should separate equipment, installation, software or licensing, commissioning, user setup, training, maintenance and any exclusions.

Speak to i2 Security & Fire Protection to arrange a site review and get a detailed Grosvenor access control quote.

Price is only one part of the decision. The comparison below shows where Grosvenor and other platforms may fit different requirements.

How Does Grosvenor Compare with Other Access Control Systems?

Grosvenor is strongest where an existing Janus or Sateon estate needs support or upgrading. It also suits sites that need to manage access centrally and connect several systems.

A different platform may suit simple small sites, mainly online management or complex enterprise identity requirements. Existing estates may also prefer to remain on one platform.

The table below compares Grosvenor with other common access control systems by best fit, main strengths and buyer considerations.

System	Best Suited To	Main Strengths	Buyer Note
Grosvenor	Sites using Janus, Sateon, Sateon Advance or JanusC4	Controlled modernisation, central management, scalable hardware, integrations and migration from some legacy Grosvenor estates	Strongest where an existing Grosvenor system needs support, expansion or a planned move to JanusC4
Paxton	Straightforward UK access control projects for small and mid-sized sites	Net2, Paxton10, PaxLock, simple administration, familiar hardware and wide installer knowledge	Best suited to sites that want simple day-to-day management and a system familiar to many installers
Brivo	Organisations that want to manage access control mainly online	Remote management, mobile credentials, visitor workflows, video links and multi-site control through a cloud platform	Buyers should check subscription costs, data requirements and integration needs
Nedap	Larger, enterprise or higher-security estates	AEOS, open integration, mobile access, physical identity management and security assurance	Larger organisations with complex access rules, certification needs and procurement requirements are likely to find Nedap a better fit
TDSi	Sites that want Internet Protocol (IP)-based access control and flexible controller options	GARDiS PRO, GARDiS Network Controller, GARDiS Web Embedded Controller, mobile credentials and third-party integrations	TDSi works well where flexible controller options and straightforward third-party integration are priorities
Vanderbilt/Acre	Sites already using ACT, Vanderbilt or wider Acre Security products	ACTpro, ACT365, SiPass Integrated and a choice of on-premises or cloud-managed access control	Most relevant where Vanderbilt/Acre equipment is already in use, or the estate needs to remain on the same platform

The right product still needs the right design, installation and support, especially where access control works alongside fire safety, CCTV or intruder alarms.

How Can i2 Help with Grosvenor Access Control?

i2 Security & Fire Protection can install new JanusC4 systems, support existing Grosvenor installations and plan upgrades or migrations.

We also look at how the access control system works with the rest of the building. This includes fire alarm interfaces, safe escape, CCTV, intruder alarms and intercoms.

As a National Security Inspectorate (NSI) Silver accredited installer, we can assess the wider security setup rather than treating each door in isolation.

Can i2 Help with a New Grosvenor Access Control Installation?

Yes. i2 can survey and design the site, then install, commission and hand over the JanusC4 system.

We specify the controllers, readers, credentials and integrations the site needs. Our engineers then install, configure and test the system before handover.

Can i2 Support and Maintain an Existing Grosvenor System?

Yes. We maintain and troubleshoot JanusC4, Sateon Advance and older Grosvenor systems.

We can investigate faults involving readers, controllers, locks, credentials, power, networks and integrations. Routine maintenance can also catch problems before they cause more disruption.

Older Janus and Sateon systems may need closer assessment. Hardware, controller type and software version can affect support and upgrade options.

Can i2 Help Upgrade or Migrate a Grosvenor System?

Yes. An i2 system audit can establish what can stay, what needs replacing and how to move to JanusC4.

If a full changeover is not practical, i2 can phase the upgrade. This can reduce disruption and keep suitable existing equipment in use.

For sites already using Grosvenor, one of the biggest advantages is that an upgrade does not always mean starting again.

Frequently Asked Questions

Does Grosvenor provide API documentation for JanusC4?

JanusC4 supports a common application programming interface (API). Full API documentation is not publicly available, but registered Grosvenor partners can access technical documentation through the Partner Zone.

Where can I get a Grosvenor Sateon software manual?

Grosvenor Technology offers a Grosvenor Sateon Advance Getting Started Guide.

Does Sateon Advance support mobile credentials?

Grosvenor does not clearly document mobile credential support for Sateon Advance. If mobile access matters to the project, confirm Sateon Advance compatibility with us before planning the upgrade.

Is training available for Grosvenor Sateon Advance?

Yes. Grosvenor offers Sateon Advance-to-JanusC4 migration training to approved partners.

What warranty does Grosvenor provide on its access control hardware?

Grosvenor provides a five-year warranty on qualifying Advance Hardware purchased after January 2024, subject to its warranty terms.

Is JanusC4 cloud-based or on-premises?

JanusC4 can run on an on-premises server or customer-controlled cloud infrastructure. It is not a Grosvenor-hosted Software as a Service (SaaS) platform.

Will JanusC4 still work if the network goes down?

Yes. JanusC4 Advance controllers store credentials locally and make access decisions independently, so authorised access can continue if the network connection fails.

Choosing the Right Grosvenor Access Control System

JanusC4 is the main Grosvenor platform to consider for new installations and major upgrades. Existing Janus or Sateon sites may also be able to retain compatible equipment during migration.

The right choice depends on what is installed, what can be reused and what the building needs. Future requirements matter too. A proper site review can prevent unnecessary replacement and show whether maintenance, expansion or migration makes more sense.

As an NSI Silver accredited installer, i2 Security & Fire Protection can install, support, and upgrade Grosvenor systems. Contact our team to discuss your site and the best next step.