Use the range to plan—not to pretend the roof was inspected.
The goal is fewer repetitive sales visits and fewer mismatched proposals. You describe the roof once, participating roofers submit sealed offers, and you compare more than the bottom-line price. A roofer still must confirm condition and measurements before a final contract.
Aerial measurements are approximate. Decking damage, permits, flashing, ventilation, material upgrades, solar handling, rooftop equipment, access, and final measurements can move a contractor’s price.