MSI & Building Management Experts

Connected buildings, low-voltage systems, and smart solutions for high-performance buildings throughout France.

About us

Discover how S3EB, the brand building automation Bouygues Bâtiment Grand Ouest combines technical expertise and innovation to design smart solutions for the building industry. A vision focused on performance, reliability, and sustainability.

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Our areas of expertise

Experts in low-currents systems and BMS since 1985, S3EB supports you at every stage of your technical projects. Discover our areas of expertise to better understand our know-how and the solutions we deploy for smart building.

Low currents

Networks, security, intercom systems, telecoms... we integrate all technical systems to ensure the performance and safety of your infrastructure.

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IoT & Smart Building

MSI and experts in connected solutions (GTB, BOS) to manage your smart buildings, optimize consumption, and improve occupant comfort.

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Code Factory

Need a mobile app, API, or custom interface ? Our engineers develop tailor-made solutions for you, from concept to deployment.

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S3EB in figures

years of experience

80%

of our customers sign a maintenance contract

employees

2,4M

in revenue

Our services

With our expertise in smart building, low-currents systems and code factory, we design and deploy customized systems to optimize Building Management Systems.

Our solutions are reliable, scalable, and compliant with standards, adapting to the requirements of every type of structure: commercial, industrial, or functional.

Our expertise in infrastructure of security, communication, and supervision enables us to guarantee high-performance installations.

In accordance with the Tertiary Decrees and BACS, we audit your facilities and define the appropriate course of action and action plan. If you wish, we can deploy a Class A or B BMS and a multi-energy metering plan, with monitoring, alerts, and reporting to help you achieve your objectives.

Technicien S3EB analysant documentation installation GTB bâtiment

Whether installing VDI (Voice, Data, Image) networks, from access control systems, from video surveillance orfire alarms, our team is committed to ensuring security, compliance and performance.

Each project is carried out with rigor and innovation, with a focus on sustainability and customer satisfaction.

We design solutions that are reliable, scalable, and perfectly tailored to your needs.

Business sectors

Our technical solutions can be adapted to all types of buildings and professional environments.

Work

Smart buildings that combine energy efficiency and well-being at work.

Produce

Industrial monitoring solutions to optimize your operational performance.

Take care

Reliable infrastructure serving healthcare facilities and their users.

Learn

Connected, secure, and sustainable school environments to support the education of tomorrow.

Have Fun

Connected, understated, and responsible cultural and sports facilities for your leisure spaces.

Defend Yourself

Safe and sustainable technological solutions to address public safety challenges.

Rehabilitate

Connected technologies to enhance existing heritage in the face of energy challenges.

Support from start to finish

Design

Working together to create sustainable installations from A to Z based on your needs is our promise for your building management and low-voltage systems.

Achieve

Mastery of the field is part of our DNA, from cabling to programming: every step is handled by our teams.

Train

We offer customized training courses to ensure you get the most out of your solution.

Optimize

Our Energy Managers optimize your consumption without compromising on comfort: greater energy efficiency and greater profitability.

Maintain

We provide regular monitoring to prevent malfunctions, extend the life of your equipment, and ensure long-lasting performance.

Transform

We ensure that your infrastructure is continuously updated to meet new uses and technical challenges.

Latest articles

Energy reduction for smart buildings : how can S3EB play this role ?

Introduction The building sector represents a major part of electricity consumption and contributes significantly to load peaks on the grid. With the rise of renewable energies and their production variations, the electricity grid needs more flexibility. It is in this context that demand response takes on its full meaning: it allows to temporarily reduce or delay the consumption of a building during critical periods, in order to participate in the overall balance of the electrical network.

16/10/2025

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Social Security Office of the Somme

S3EB will equip a BOS (Building Operating System) for the rehabilitation of the CPAM in the Somme ! This BOS will rely on sensors, actuators, automates, meters and regulators to monitor consumption and supervise technical equipment. The blinds will also be controlled.

30/07/2024

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Brest – Océanopolis

Head west where S3EB carries out the BGT of the Restructuring and extension of OCEANOPOLIS, the National Center for Scientific Culture dedicated to the Ocean, in Brest.

24/07/2024

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