Search signal
The refined keyword map keeps site-work, foundation, and utility-cost intent grouped together because these costs often decide whether a modular ADU budget stays believable.
Cost drivers
Useful inputs include access width, crane reach, grade, drainage, demolition, foundation type, trenching distance, panel capacity, sewer route, water line distance, and staging area.
Calculator use
Enter site-work categories separately. If a buyer has no foundation or utility quote yet, the calculator should show that gap instead of rolling it into the unit price.