Build a room-by-room access schedule
Start with the proposed pipe route and list each wall, ceiling, cabinet, chase or service space that may need access. Give every opening a room, approximate location and purpose. Separate known production openings from areas that may require exploration after concealed conditions are reviewed. Record furniture, appliance and storage conflicts before the estimate visit. This schedule gives contractors the same starting information and makes it easier to see when one price assumes broad access while another depends on smaller openings or a different route.