What the property itself changes
A crawlspace with three feet of clearance, a finished basement rec room that needs protecting, a steep roof pitch, and mature trees crowding the foundation all add time a generic estimate won't capture.
Where the work actually stops
The repair boundary, whether existing systems have the capacity for the fix, which materials suit an older or newer wall assembly, and how testing and haul-off get handled all belong in writing.
When it's not just one trade
City of Fort Wayne permits, a structural engineer, an environmental lab, or an additional trade can all become part of a project — check with the selected provider and the relevant city office about what your specific job requires.
A written, property-specific scope is what to ask for next.