Be consistent with who will complete the rough-in and finish work.
With a kitchen or bathroom, the rough-in work involves bringing the waste, plumbing, and electrical services to the right places. So pipes and cables are installed in walls and under floors and are left poking out. Typically, walls are then lined and plastered, and floors laid, before the finish work.
The finish work is where the cabinets, appliances, faucets, light fixtures and tiling are done. In nearly every case the building permit requires your project manager to list one contractor on a task from start to finish. It’s difficult to change the contractor mid-process. This process can work well as long as all parties understand in advance exactly what’s expected of them.