Public contracts of Nantes Métropole · 2025

Missions d’assistance à maîtrise d’ouvrage pour la réhabilitation du Grand Auditorium et de la Grande Halle à la Cité des Congrès de Nantes

€77k

contract ceiling — what was paid on it is not published

Signed on 22 January 2025 · ended around April 2026 · 15 months

Who won it

Co-SIngénierie, études techniques · registered office Paris (75020) · headcount 10 to 19 employees · SIREN 819394149

Main holder, with the largest amount. The contract has 12 holders; the others are not shown here yet.

The competition

4 bids received

Median for this procedure in 2025: 3 bids, across 17684 comparable contracts. Open tender · awarded to 12 companies

Open data publishes the winner and the bid count — never the identity of unsuccessful bidders.

Number 164 by amount of the 225 contracts Nantes Métropole published for 2025.

Other contracts of Co-S in Nantes Métropole

Missions de programmation et d’assistance à maîtrise d’ouvrage…20262.1€M Marché subséquent n°5, Étude de programmation…202418€k

Contract details (procedure, price, amendments, lots)

Procedure : Appel d'offres ouvert

Framework agreement : yes: orders follow, the amount is a ceiling

Price : Forfaitaire

Published amendments : 1

Subcontracting declared : no

Contracts above €40,000 excluding VAT, as declared when they are awarded (DECP): contract amounts, not payments. Smaller contracts are not published; obviously wrong amounts are set aside.