Public contracts of Nantes Métropole · 2026

Travaux de rénovation du Grand Auditorium, de la Grande Halle et de la Galerie de Liaison à la Cité des Congrès de Nantes Mapa

Installation de chantier

€271k

maximum contract amount over 22 months — what was paid on it is not published

Signed on 4 March 2026 · running until about January 2028 · 22 months

Ongoing3 Jan 2028

That is at most ~€148k a year on average: a maximum too.

Who won it

Prorata & ServicesSIREN 811575505

The competition

4 bids received

Median for this procedure in 2026: 3 bids, across 20741 comparable contracts. Simplified procedure · awarded to 1 company

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

Number 150 by amount of the 311 contracts Nantes Métropole published for 2026.

Contract details (procedure, price, amendments, lots)

Procedure : Adapted procedure: the lighter procedure allowed under the EU thresholds

Price : Forfaitaire

Published amendments : none

Subcontracting declared : no

Environmental considerations : Critère environnemental

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.