Wow, this question is wide open. Do you have a general contractor? If not, I might start there as they will already have the answers to your questions. You will pay them for their expertise, but with such a high price tag, I don't know that I would take the role of GC myself and hire my own subs. Should you decide to undertake the role of GC, before your break ground, you need to select all of your subs which will be required to get the building permit. One sub may be able to refer another as they all need to work well together. You also need to at least talk to the electric and gas company to find out their processes. You don't need them today, but will shortly so it is best to have them lined up. In general, the order should look something like this: excavation, inspection, footers, inspection, foundation walls, damp proofing, drain tile/sump pump, inspection, backfill, plumbing (if you are putting anything in the floor of the basement like a stub for bathroom, drain, etc.) Are you connecting to city sewer and water? Well/septic? This has to be hooked up. Pour basement floor (assuming there is one.) While this is all taking place, you need to get your wood package including floor trusses or iJoists there so you can start setting once you have the concrete floor poured. iJoist/floor truss set, subfloor, exterior walls with sheeting and wrap. 1 story? 2 stories or more? Keep going up. In WI, house has to be under roof before the electric service main can be added. Interior walls have to be added but each of your subs will know their process and what needs to be done before the next step. I have probably missed tons of small decisions that needed to be made to be on schedule hence the recommendation for a GC.
