The operation consists of the completion of interior works on the free trays at R+ 2 and R+ 3 of the 4 avenue de Colmar building in Mulhouse. The works are broken down into 9 lots. The R+ 2 plateau of 380 m² hosts the association TUBA (Tube with urban experiments), a new structure on Mulhouse dedicated to the development and experimentation of new urban services. The R+ 3 plateau of 430 m² welcomes the Associations of 48 (workshop of entrepreneurs) which are structures to support the creation of a business or activity. The objective is to create a pole of economic development and business creation.