Electronic locking systems as a solution for multi-tenant buildings

In contrast to traditional mechanical locking systems, electronic or digital locking systems offer many advantages, especially in multi-tenant buildings. The biggest difference: digital locking systems do not require a physical key. Modern access media are used instead, including:

• NFC transponders and key fobs
• MIFARE key cards (e.g. NXP MIFARE EV3)
• Smartphone-based access solutions via the BlueID app (iOS and Android)
• Employee badges with integrated access function
• Wall readers for main entrances, elevators and underground garages

The access media are managed via a central cloud platform. The building operator or property management team can flexibly control at any time which key holds which permissions. Rights can be extended, restricted or time-limited, even across multiple sites. Up to 1,024 entries can be stored on a blacklist per lock to reliably block lost media.

Benefits of a digital locking system in a multi-tenant building

Digital locking systems are becoming increasingly popular for clear reasons. They offer a range of concrete benefits and are steadily replacing mechanical systems.

Flexibility during tenant changes

Building operators enjoy maximum flexibility with an electronic locking system. The BlueID software allows precise control over which access medium holds which permissions. When employees leave a company or a tenant terminates the lease, permissions can be revoked with a single click. When a person's responsibilities expand, access rights can be extended just as easily, including time windows for weekends or shifts.

Security & cybersecurity

A high level of security is a key reason for choosing electronic locking systems. Concerns about hacking are sometimes raised. However, with a provider like BlueID that relies on high-grade encryption, VDE certification and OSS compliance, the result is a secure alternative to mechanical systems. The solution also meets the requirements of GDPR and the EU NIS2 directive, which makes it attractive for commercial tenants.

Cost savings from lost keys

The more users need a key, the higher the probability of a key being lost. With a mechanical locking system in a multi-tenant building this can become expensive quickly, the entire system has to be replaced as fast as possible to avoid security risks. Costs of EUR 5,000 to 15,000 are not uncommon. With a digital BlueID locking system, only the permissions are adjusted with a few clicks, no hardware replacement required.

Tailored solutions

Electronic locking systems for multi-tenant buildings can be tailored precisely to individual requirements. BlueID offers different packages from Starter to Integrator and a broad product portfolio: knob cylinders, door fittings, wall readers and more. This way, every operator finds the right option.

Visitor management & audit trail

With an electronic locking system, operators have full visibility into who is in the multi-tenant building at any time. Audit logs enable effective visitor management and precise tracking of access events. For tenant companies, this feature is particularly relevant for access protocols, compliance and, if needed, time tracking.

Convenience for tenants and employees

Digital access media are considered particularly convenient. For employees who want to enter the multi-tenant building quickly, they are the ideal solution. No more long searches for the right key, the door opens via a smartphone tap, placing a card on the reader, or simply approaching the door thanks to BLE.

Cloud management & SSO integration

BlueID provides open APIs and SDKs for integration into building management systems, booking platforms or tenant management software. Commercial tenants can use Single Sign-On (SSO) to manage their own employees independently, while the landlord retains control over the main entrance, elevators and common areas.

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How much does a locking system for a multi-tenant building cost?

The cost of a locking system for a multi-tenant building depends on the number of doors, the tenant structure and the desired software features. Typical ranges:

• Mechanical system for a medium-sized property: approx. EUR 2,000 to 10,000 including installation
• Mechatronic hybrid solution: EUR 5,000 to 20,000 depending on door count
• Digital BlueID system: from EUR 50 one-off plus EUR 1 per lock per month (Starter package)
• BlueID Professional: EUR 2,000 per month, including 50 locks and 15 % hardware discount
• BlueID Integrator: EUR 5,000 per month, including 100 locks, 30 % hardware discount, all SDKs

Over a typical usage period of 7 to 10 years, the digital solution usually amortizes within 3 to 5 years because key replacement costs and administration overhead are eliminated.

Configure your individual locking system for your multi-tenant building now, free of charge and without obligation.

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Buying an electronic locking system for a multi-tenant building: purchasing criteria

When planning a locking system for a multi-tenant building, the following criteria are key:

• Central cloud management with role-based access rights (landlord, property manager, tenant, service provider)
• Multi-tenant capability for independent tenant accounts
• Strong encryption and VDE / OSS certification
• Real-time blocking of lost media
• Open APIs for integration into property management software, booking systems or HR tools
• Scalable from 5 to several thousand locks, ideally with central control across multiple properties
• Made in Germany and GDPR-compliant data processing
• Offline functionality and battery life of approximately 2 years
• Mobile credentials, NFC and BLE support

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Legal framework: condominium resolutions and tenant liability

In a homeowners' association the installation of a new locking system qualifies as a structural change and requires a majority vote at the owners' meeting. For commercial properties, the lease agreement defines responsibility for keys and access. Tenants are usually liable for lost keys and must bear the cost of a replacement. A digital locking system largely eliminates these risks because expensive cylinders no longer need to be replaced. Insurance coverage also applies to electronic systems; a brief clarification with the building insurer is nevertheless recommended.

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Retrofitting: from mechanical to digital locking systems

Upgrading an existing locking system to a digital BlueID system can be done modularly. A typical rollout: main entrance, elevators and sensitive areas (servers, archives, technical rooms) are upgraded first. Floors or tenant units follow step by step. Mechanical and electronic components can run in parallel during a transitional phase, a full system replacement is not required. Existing employee badges can be integrated via NFC so that staff do not need to carry multiple media.

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Conclusion

Digital locking systems are the new standard for modern access control. In multi-tenant buildings, their strengths become particularly clear: central management of multiple tenants, fast reaction to tenant changes or lost keys, transparent audit logs and a higher security level compared to mechanical systems. With Made-in-Germany quality, VDE certification and a cloud-based platform, BlueID provides a solution that is equally suited for office buildings, mixed-use properties and commercial multi-tenant residential buildings.

Would you like to know what a locking system for your multi-tenant property could look like in concrete terms? Configure your individual solution in just a few minutes.

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FAQ: Common questions about locking systems in multi-tenant buildings

What is a multi-tenant building?

A multi-tenant building is a property with several independent rental units. Typical examples include office buildings with multiple companies, mixed-use properties (residential + commercial), coworking spaces or multi-party residential buildings. Unlike single-tenant buildings, multi-tenant properties must organize access for many different parties.

Which locking system is suitable for a multi-tenant building?

For changing tenant structures and many doors, a digital locking system is clearly preferable. It enables central management, fast blocking of lost media, audit logs and independent tenant accounts. Mechanical systems remain useful only for very small properties with stable tenant structures.

How much does a digital locking system for a multi-tenant building cost?

At BlueID, packages start from EUR 50 one-off plus EUR 1 per lock per month. Medium-sized commercial properties typically use the Professional package (EUR 2,000 per month, 50 locks included). Comparable mechanical systems cost between EUR 2,000 and 10,000 including installation.

How does the management of multiple tenants work with a digital locking system?

The BlueID cloud platform supports multi-tenant accounts. The landlord manages the main entrance, elevators and common areas. Each tenant has their own account and can manage employees, access rights and time windows independently. Open APIs allow integration into existing property management software.

Is a digital locking system GDPR-compliant?

Yes. BlueID processes personal data in compliance with GDPR; audit logs are stored only for defined periods. Access rights to the management software are assigned on a role basis, so each tenant only sees their own data.

Can an existing locking system be upgraded to a digital one?

Yes. The upgrade is modular. It is common to start with the main entrance, elevators and sensitive areas and then extend the system floor by floor. Mechanical and electronic components can run in parallel during a transitional phase.

What happens if a key is lost in a multi-tenant building?

With a mechanical system, the entire locking system often has to be replaced, which can quickly cause five-figure costs. With a digital BlueID system, the lost medium is blocked via the cloud within seconds and added to the blacklist of the lock. No hardware replacement is required.

How is access for emergency services and contractors managed?

Emergency access rights for fire department, ambulance and police can be configured in the system and activated only when needed. External service providers like cleaning staff or technicians receive temporary permissions with a defined time window that are automatically deactivated after expiry.

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