Tech construction company for retail shop in Oslo

Hello i am establishing retail Candy shop in rØa torget in Oslo. i am looking for technical construction company giving their best offers, below you can find some points to be considered: • The shopping mall technical standard is NS3420 Tolerance class 2, and the technical construction company should be familiar with this standard in order to avoid any issues with the rØa torget operation company. The company can afford the below services: • Walls will be covered by wallpapers not paint.