Know what the plan is asking the house to do.
Keeping the kitchen footprint and major service locations in place is different from moving a sink, opening a wall, adding an island, or extending the room. Each move can affect structure, electrical capacity, plumbing, ventilation, flooring transitions, and the amount of time the household loses its kitchen.
Put the non-negotiables in writing: a clear path from entry to fridge, a place to prep, enough pantry storage, a safer cooking zone, or a table that finally works for the people using it. Then list the things that are flexible. This helps a designer or contractor test the layout instead of guessing what matters most.