GA Entreprise is GA’s general contracting company. Its area of expertise covers all phases from the design
to the handover of a turn-key building.
GA Entreprise’s strength lies in the skill of its personnel, which includes a high percentage of engineers,
and in its use of building processes that are optimized with every new building project. Developed by the
group’s Research and Development department, these processes enable GA to design and construct buildings
consistently and homogeneously. Our products and processes have been proven efficient; this is why, without
incurring any significant additional cost, GA Entreprise’s buildings are always certified with the green
building labels HQE® and BBC.
Our processes and equipment concern:
- Concrete structures
- Exterior aluminium joinery
- Architectural concrete façades
- Air handling via individual air-to-air heat pumps
- Centralized Technical Management: GAPEO®
Far from being a constraint, these systems are a genuine tool box for the project’s architect, in whose hands
they become a way of combining architectural quality with intelligent design.
Arte Charpentier, Atelier 115, Anthony Béchu, Jean-Philippe le Covec, Jean-Paul Viguier and Aymeric Zublena
are just a few of the well-known architects who have demonstrated their confidence in GA and have designed
and built buildings in partnership with GA Entreprise.
For decades GA Entreprise has set the standard in commercial property. Now geared strongly towards the
production of green office buildings with High Environmental Quality (HQE) certification, it has become
a leader in office building production throughout France.
GA, the specialist in commercial property, stands out from its competitors by its range of features that add comfort and security.
Since the late 1980s GA has been ceaselessly designing, developing and improving the efficiency, in particular the energy
efficiency, of heating, lighting and other apparatuses. Today GA’s comfort-enhancing equipment is grouped together under
the trademark GAPEO®. It encompasses:
- An air handling apparatus, the GA reverse-cycle S9 heat pump, which performs the functions of heating, cooling, dual-flow hygienic
ventilation and free cooling, supplying just the right amount of energy required to meet the final user’s needs as closely as possible.
- Free-standing light fittings by Gadelune, equipped with electronic dimmers and detectors that adjust automatically depending on the amount of natural light available.
- The DB20061 window, equipped with triple glazing and integrated motorized blinds that improve both thermal and visual comfort
- A hardware key that allows users to remotely control all these devices
- Centralized Technical Management (CTM), which communicates with all the equipment in order to transmit information such as operating status
and energy consumption to the monitoring station in real time
- A web site that communicates with the CTM, enabling authorized users to check their building’s detailed energy consumption, broken down
by usage : HVAC , lighting, etc.
GAPEO® gives building managers decision-making and coordination tools that reduce operating costs:
- Optimization of the power supply contract
- Automated management of technical facilities on a day-to-day basis, the ideal way to prevent any excess and guarantee lasting energy efficiency while providing the utmost in comfort
GAPEO® is continually being upgraded, and this process of constant innovation enables the GA Group to meet
the requirements of the energy certification (BBC 2005 Effinergie®) and the environmental labels (NF Bâtiments Tertiaires – Démarche HQE®).
It also means that GA can formally commit itself to users to reducing energy consumption by signing agreements such as the Energy Performance
Contract. This unique know-how makes GA a renowned player in commercial real estate and sustainable construction.
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GA Services has your best interests in mind. With its support and advice, you will:
- Enjoy consistent, coordinated management of your portfolio on the regional and national level so as to increase your assets’ value
- Get the benefit of the best business practices, especially in risk management, business processes, tools of technological intelligence and construction management
- Control the operational, technical and legal risks your assets carry
- Significantly reduce your costs and control your current expenses
- Make the right property strategy decisions
GA Services benefits from the group’s expertise in energy cost control
(GAPEO®: Active Computer-Aided Management of Energy Efficiency), procurement, supplier selection and after-sales service.
An added value that guarantees the sustainability of your assets.
GA Rénovation is a wholly-owned subsidiary of the GA Group. With its broad experience in the group’s
different business lines, GA Rénovation brings comprehensive skill to your project.
Renovation work by GA Rénovation enables you to reposition a property on the market. This is an infallible way to increase
its rental value and attract high quality companies. GA Rénovation provides administrative and financial advice to guide
you in thinking about rehabilitating your assets. Rehabilitation will directly benefit the occupiers of the property unit
by improving workplace comfort and burnishing users’ corporate image.
GA Rénovation also adapts your property’s equipment and fit-outs to bring them into compliance with standards
of health, safety and energy conservation.
GA Rénovation develops innovative solutions for the control of operating costs of your property assets,
allowing you to keep heating, lighting and water consumption under control.
GA Promotion is the GA group’s professional of office, light industrial and logistics property development.
Backed by the skills of the group’s construction companies and by its financial solidity, GA Promotion boasts
over-arching mastery of all phases of the property development process. GA Promotion’s comprehensive approach
harnesses the group’s research, design and building know-how for the development of all kinds of commercial
buildings, whether they are low-energy, high environmental quality office buildings or sophisticated industrial
buildings geared to serving the business occupier.
This expertise is made available to the best-known contracting owners and architects so as to combine architectural
quality, construction quality and energy efficiency. Coordinating these skills like a conductor leading an orchestra,
GA Promotion is the single contact for investors, users and local authorities. It operates in a variety of contractual
- Off-Plan Sales
- Real Estate Development Contracts
- Turnkey rental properties
- Delegated project management
GA integrates and masters all the stages of construction, from preliminary design to handover.
This includes engineering studies, factory production, on-site assembling, and mechanical &
electrical and fittings & finishings work packages.
The project manager, benefitting from considerable knowledge-building, is an experienced
technician who drafts projects specific to each user.
Relying on a technical and financial library of tried and tested solutions, the fruit of
extensive experience, the Oméga engineering and design office draws up the design and
production documents. It is the keystone of technical knowledge and validates every new development.
The production units and the works department give concrete form to the construction based on the
project manager’s technical specifications and those of Oméga. The construction engineer and the
project manager are the main contact persons every step of the way, from the preliminary design
right up to the final handover.
For over 40 years GA has been developing industrialized building processes. Having the components
factory-manufactured avoids exposure to uncertain weather conditions and building site nuisances
and guarantees reliable, resistant constructions with very short lead times.
Intertec structural frameworks consist of pre-stressed concrete frame elements assembled on site by
housed joints by means of mechanical connectors. They are guaranteed to withstand earthquakes and fire.
The frameworks make for a flexible layout grid that can measure up to 30 m x 20 m.
LEIGA and TRIDAL frameworks:
These systems allow us to build multi-storey buildings by means of slabs lying either on a system of posts and
lintels or fitted directly onto posts with no dropped girders, thus making it easier to route utilities in the
ceiling and optimizing ceiling height in the upper floors.
These frameworks enable us to build large floor plates without intermediary load-bearing walls.
The slabs have perfectly flat tops and undersides, so floor coverings (or raised floors) can be put in directly
and acoustic slabs can be glued right on to the ceiling. This improves sound insulation between adjacent premises
and provides greater protection against the spread of fire.
Architectural façades, insulation and thermal inertia, acoustic insulation:
Our façades are made of natural materials such as architectural concrete and brick slips, and are guaranteed
to be sturdy and long-lasting. They come in a wide range of facings including polishing and inlaying,
with high-quality finishing produced in our factories. The self-cleaning natural materials make upkeep easy.
The thermal insulation is perfectly protected by the concrete of the facing with no risk of a break and is safe from air infiltrations,
unlike façades created by insulating wall panels (e.g., clamped stone or added cladding)
The continuity of the insulation between the different levels of a building ensures a perfect thermal insulation of the floors.
Aside from the façade cladding, the mass of the building’s concrete is inside the insulation,
providing strong thermal inertia and good acoustic insulation from outside noise.