A fit-out is the work that turns empty space into a usable office. Cat A delivers a functional blank canvas: raised floors, suspended ceilings, basic mechanical and electrical services. Cat B adds everything that makes it yours: partitions, furniture, branding, meeting rooms, kitchens and IT.
Fit-out is where workplace strategy becomes physical, and getting the desk-to-collaboration ratio wrong is expensive to reverse. Utilisation data from your current space is the best predictor of what the new one actually needs.