Salon Actes · 2026

Agoris analysis · updated October 2026

Key takeaways

• The Congrès UNTEC is the annual national gathering of the Union Nationale des Économistes de la Construction (UNTEC), the representative trade body for the profession since 1972. The 2026 edition is the 54th congress (53rd in 2025).
• Since 2025, the trade show element of the congress has been known as Salon Actes (standing for Aménagement Construction Territoires Economie Solutions), a format open to the entire construction, architecture and development sector. The Chartres edition is the 2nd edition of Salon Actes.
• The next edition runs from 3 to 5 June 2026 at the Parc des Expositions L'Iliade de Chartres: general meeting and congress on 3 June, with the trade show open to all sector players on 4 and 5 June.
• Travelling format: the 1st edition of Salon Actes took place in Le Havre (Carré des Docks) in June 2025, with the 2nd edition in Chartres in 2026. The venue changes with each edition.
• Dominant theme of the 2026 edition: artificial intelligence and mastering it across the construction trades (source: batiactu.com).

Who exhibits

Typical profile

Manufacturers and material producers, vendors of trade software (construction economics, BIM, quantity surveying), engineering consultancies, and technical and constructive solutions across all trades. The visitor base brings together construction economists, project managers, clients, architects, engineering consultancies and sector businesses.

Notable exhibitors

The exhibitor list is available on the official website: actes-untec.com/exposants. Around a hundred exhibitors present their product and technical innovations. Among the exhibitors and partners of recent editions: Malerba, Tellier Brise-Soleil, IsoHemp, Construction21 (sources: malerba.fr, tellierbrisesoleil.com, isohemp.com, construction21.org).

Quality of the visitor base

• A professional visitor base from the construction sector, strongly geared towards specification and project economics (construction economists, project managers, engineering consultancies).
• The 1st edition of Salon Actes in 2025 in Le Havre targeted more than 1,500 visitors (figure announced ahead of the event; no audited OJS report published to date).
• The congress also brings together UNTEC members for their annual general meeting.

Activities and community

Conference programme

The programme is built around the congress (general meeting and plenary sessions for UNTEC members) and Salon Actes, which is open to the whole sector. The 2026 edition placed artificial intelligence at the heart of the discussions (source: batiactu.com).

The show's signature format: the BATI.REX, 15-minute expert talks held within the exhibition hall, organised around several themes: business management (administration, HR, entrepreneurship), feedback on landmark projects, and innovations in materials, techniques and processes. The 2026 edition added a strand of "feedback on life journeys".

Awards and accolades

Salon Actes recognises both partner exhibitors and UNTEC members through trophy ceremonies (source: actes-untec.com, to be cross-checked via browser). Categories and winners are announced in the run-up to each edition.

Community and networks

UNTEC is the representative trade body for construction economists and runs the congress through its Untec Services structure.

Salon Actes forms partnerships with sector media and networks, including Construction21 for the 2026 edition (source: construction21.org).

On site: what you need to know

Access, parking and accommodation: see the listing for the Parc des Expositions L'Iliade de Chartres.

Specific to the trade show:

• Access: L'Iliade is reachable via the A11 from Paris (around 1 hr by car) and by train from Paris-Montparnasse (around 1 hr). Free parking on site (source: actes-untec.com/informations-pratiques).
• Visitor badge: prior online registration on the official website, reserved for sector professionals.
• Travelling format: the venue changes with each edition. Check the city and site of the upcoming edition on actes-untec.com before planning your visit.

Preparing your visit

For the exhibitor

• 9 months out: make contact to book a stand via the official Salon Actes website.
• 6 months out: prepare the stand layout and product demonstrations.
• 3 months out: apply for the trophies and pitch a BATI.REX talk if relevant.
• 6 weeks out: schedule meetings with construction economists and specifiers.

For the decision-making visitor

• Pre-register online on actes-untec.com with proof of professional activity.
• Identify the BATI.REX talks and project feedback sessions of interest in advance, according to your projects.
• Allow one to two days depending on scope (material innovations, trade software, specification).

How the trade show has evolved

Trajectory analysis

In 2025, UNTEC overhauled the trade show element of its national congress under a new brand, Salon Actes, opened up to the entire construction, architecture and development sector beyond members alone. The 1st edition in Le Havre brought together around a hundred exhibitors and targeted more than 1,500 visitors (a figure announced ahead of the event). The 2nd edition, in Chartres from 3 to 5 June 2026, confirms this travelling format and made artificial intelligence its common thread. Backed by a congress now in its 54th edition, Salon Actes builds on UNTEC's historic roots in the construction economics profession while broadening out to project managers, engineering consultancies and manufacturers. The city and site of the following edition are announced at each congress.

Unless otherwise stated, all factual data in this listing comes from the organiser's official website (actes-untec.com).