hello, I have just bought a property that needs a) fumigation (section 1), b) landscape grading to improve drainage, c) crawspace/foundation work to repair some piers and fix sump pump, and d) minor interior remodel and retrofit window. 

Should I do a b c d in any sequence? Or it doesn’  matter?

My question is should I finish b) grading and c) crawlspace work before a) fumigating?  Or doesn’t matter?

@James Channing if the grading includes moving soil away from the building because it is touching the sill plate (bottom of the exterior wall), then I would do the grading before the fumigation.  Other then that, the order does not really matter.  I would just see who is available and schedule based on availability.

I wouldn't start on any interior work until the foundation work is completed.

Thanks all!