Currently the lot is cleared, and plumbing and footings have passed inspections by the county. The slab will be poured soon. First, decide if you'd prefer a professional home inspector, a structural engineer, a contractor, or a building inspector to do these inspection for you. If you decide you want a home inspector, call the real estate agent who sold you the property and ask him or her to provide you with the names of three respectable, knowledgeable professional home inspectors. Call each of them and ask how much they'd charge to come out and look at your property.
Lenders typically use architects to perform their inspections of new construction sites.
You might contact several new construction lenders and ask if they can recommend an inspector to you. You can also call your local municipality and see if any of the building inspectors can recommend someone to help you. Because you'll probably want someone checking on the site several times, or perhaps even once a month, see if you can negotiate a package fee.