Maintenance service
- Reliable maintenance service
- Fast & scheduled on site
- Professional & standards-compliant
Professional maintenance service for doors & master key systems in Berlin
Fair. Local. Competent. In Berlin since 2013.
Your certified specialist company from Prenzlauer Berg. We look after property managers, schools and commercial properties within a radius of 8 km, with state-of-the-art technology and expertise. As Fair Schlüsseldienst, we stand for honest advice, clean work and reliable service for everything to do with doors and master key systems. Rely on more than a decade of experience – straight from Prenzlauer Berg.
Protecting your property's value since 2013
Why is regular maintenance important?
Ensuring security:
Wear on locks and door closers often goes unnoticed. Regular maintenance helps to identify and prevent security gaps at an early stage.
Saving costs:
Preventive maintenance avoids expensive emergency repairs and extends the service life of your installations.
Minimising liability:
For property managers, schools and public buildings, fire doors and escape routes are required by law to be in working order.
Our services at a glance
Lock cylinders & keys
Checks for smooth operation, wear and material fatigue to ensure reliable operation.
Locks & fittings
Checks on the stability and function of all mechanical components on doors.
Door closers
Professional adjustment of closing speed and latching action – important for fire protection and accessibility.
Master key systems
Maintenance of mechanical and digital locking systems for residential and commercial properties.
About us – expertise from Prenzlauer Berg
Since 2013, Fair Schlüsseldienst has stood for fair service, professional work and personal support in Berlin Prenzlauer Berg. We are not an agency but a local specialist company with permanent contacts and short distances.
Our staff regularly attend training with manufacturers and at trade fairs so that they are always up to date with the latest technology. Through continuous training and certified quality, we make sure that maintenance and servicing are carried out reliably and in line with standards.
Thanks to our regional focus on a radius of around 8 kilometres, we can be on site quickly when needed – efficiently, on schedule and reliably.
Certified to DIN 14677 – fire protection & hold-open systems
Since February 2026, our team has been officially qualified as a
competent person for fire doors and gates and as a specialist for hold-open systems in accordance with the guidelines of the TÜV SÜD Akademie.
Regular further training and standards-compliant inspections ensure that our maintenance is carried out to current technical standards.
This means we are authorised and qualified to
- professionally inspect fire and smoke protection closures
- maintain hold-open systems in line with standards
- look after fire doors safely and in compliance with the law
Who is our maintenance service for?
Property managers & owners
Reliable scheduled maintenance takes pressure off day-to-day work and makes upkeep easy to plan.
Businesses & offices
Properly functioning locking technology protects inventory, staff and sensitive areas.
Hotels, restaurants & event venues
Regular maintenance ensures smooth operations, safety for guests and staff, and standards-compliant operation of doors and master key systems.
Schools & nurseries
High demands on security, durability and the reliable function of doors and master key systems.
Public buildings
Compliance with all relevant safety standards, guidelines and legal requirements.
Call us or visit us – we will find the right security solution for you.
Shop opening hours:
During our opening hours you are welcome to drop in without an appointment – or simply give us a call: