THE 2025 SIMI GRAND PRIX WINNERS
On Tuesday, 9 December, SIMI presented the 2025 SIMI Grand Prix Awards.
The jury was made up of real estate directors from leading French companies and was chaired by Stéphanie BENSIMON, Head of Real Estate at ARDIAN. The SIMI Grand Prix Awards recognise the year’s outstanding office, logistics and business and people services buildings across four categories. The competition is open to all real estate professionals in France, whether or not they are exhibiting at SIMI, for projects located in France that were completed and operational between 1 June 2024 and 30 September 2025.
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WINNER – OFFICE BUILDING CATEGORY
This category recognises a new or renovated office building, or a building that has undergone an interior refurbishment project, with a surface area of more than 5,000 sqm.ur de + de 5 000m².
HARMONY
LA GARENNE-COLOMBES (92), presented by NEXITY
The Harmony – Engie Campus project transforms a former PSA industrial site in La Garenne-Colombes into an innovative 94,811 sqm office campus, structured around a 1.6-hectare park. Led by Nexity, Engie and Swiss Life AM France, and designed by SCAU, Chaix & Morel, ArtBuild and Base, the project promotes an inclusive working environment that is open to the city. The transition from a vertical to a horizontal site encourages collaboration and stronger integration into the urban fabric. Powered entirely by renewable energy, the campus embodies the transition towards a post-carbon future. It offers flexible spaces, a wide range of services — including a nursery, sports facilities, catering, terraces and Engie University — as well as an accessible park promoting biodiversity and quality of life. Harmony embodies the city of tomorrow: sustainable, open and exemplary.
WINNER – MIXED-USE COMMERCIAL BUILDING CATEGORY
CThis category recognises transformed office buildings incorporating a mix of uses within the commercial sector — offices, hotels, schools, retail, coworking spaces, etc. — with a maximum of 30% residential space.
LE QG 206 LAFAYETTE
PARIS (10TH ARRONDISSEMENT), presented by LA FINANCIÈRE SAINT JAMES AND GROUPE MADAR
In the heart of Paris’s 10th arrondissement, QG 206 Lafayette transforms a complex urban block into a vibrant, mixed-use neighbourhood. Developed by La Financière Saint-James and Groupe Madar and delivered by Redman, the project brings together 10,296 sqm of offices, social housing, retail, collaborative spaces and an auditorium, organised around a landscaped pedestrian passage. Designed by DATA Architectes and THINK TANK Architecture, it combines heritage and innovation, with 68% of the existing structure preserved, reused materials, timber structures and a bioclimatic double-skin façade. Green roofs further enhance biodiversity. Certified HQE, BREEAM, BBCA, E+C-, NF Habitat HQE, BiodiverCity, ActiveScore Platinum and WiredScore Gold, the project is an exemplary and replicable model of sustainable urban regeneration in the heart of a major metropolitan area.
WINNER – INDUSTRIAL & BUSINESS PREMISES CATEGORY
This category recognises new or renovated industrial and business premises offering modern and flexible solutions.
ACTI HALL
VAIRES-SUR-MARNE (77), presented by JMG
ACTI-HALL, located in Vaires-sur-Marne on a former industrial brownfield site, offers new, flexible rental spaces ranging from 2,000 to 6,000 sqm, tailored to the needs of productive businesses. This 26,252 sqm building, designed for industrial, logistics and commercial activities, embodies a sustainable and flexible model. It includes 13,600 sqm of green spaces, 1,560 sqm of green walls, bio-based materials and facilities for renewable energy generation. Served by Vaires-Torcy railway station and several bus routes, the site promotes sustainable mobility with bicycle shelters, carpooling facilities and EV charging stations. ACTI-HALL is an exemplary redevelopment project combining economic performance, quality of use and environmental responsibility, supporting the reindustrialisation of the Île-de-France region.
WINNER – LOGISTICS & PARCEL DELIVERY BUILDING CATEGORY
This category recognises a new or renovated logistics building.
DAHER / SIMAERO MIXED-USE LOGISTICS & BUSINESS BUILDING
TREMBLAY-EN-FRANCE (93), presented by BARJANE
BARJANE has developed a 9,000 sqm business facility in AeroliansParis, Tremblay-en-France, for SIMAERO and DAHER. Designed in partnership with Grand Paris Aménagement and by GBL Architectes, the project shares facilities while meeting the specific needs of both companies. SIMAERO has an ERP-compliant hall for eight flight simulators and office space, while DAHER benefits from a logistics unit and commercial space. The carefully designed architecture enhances the urban frontage through a staggered layered structure. Reversible and high-performing, the building is targeting BREEAM Very Good certification and levels 1 and 2 of the Bâtiment Biosourcé label. It incorporates heat recovery, photovoltaic panels, sustainable water management, bio-based materials and landscaping, demonstrating BARJANE’s commitment to sustainable, functional industrial real estate that is fully integrated into its territory.
JURY’S SPECIAL FAVOURITE
GREEN CAMPUS POISSY STELLANTIS
POISSY (78), presented by GA SMART BUILDING AND CRÉDIT AGRICOLE IMMOBILIER
In Poissy, Stellantis is transforming a former industrial brownfield site into a 72,000 sqm green campus designed by Patriarche to accommodate 8,200 employees. The campus includes 40,000 sqm of offices spread across eight buildings, delivered by GA Smart Building, Crédit Agricole Immobilier, Equinox and Progama. Designed for hybrid working, it encourages collaboration through a horizontal architectural approach and welcoming spaces such as “Cassiopea”. The project removes 14,000 sqm of artificial surfaces and creates 20,000 sqm of green spaces. It achieves E+C- labels (E3C2 and E3C1), anticipating RE2025 standards, and aims for operational carbon neutrality. Thanks to off-site construction, the project was completed in just 21 months. This campus showcases high-performing, sustainable and resilient commercial real estate adapted to climate challenges and evolving uses.
A JURY OF REAL ESTATE DIRECTORS FROM LEADING COMPANIES!

Stéphanie BENSIMON
Head of Real Estate
ARDIAN
Chair of the Jury

Jérome ARNAUD
Real Estate Director
ALSTOM Group

Anne Céline BEAUSSIER
Global Head of Real Estate
SCOR

Thibault CELANT
Real Estate Director
HEPPNER Group

Arnaud FOTINAR
Group Real Estate Manager
FIVES

Frédéric GOUPIL de BOUILLE
Senior Director, Business Development – Occupiers
COLLIERS FRANCE

Pierre HAMON
Asset Manager Bretagne ORANGE

Marie-Alba TERNISIEN
Group Real Estate Director
STELLANTIS