If you're having a new home built, when should you have the home inspection? What type of home inspections should be done? We get asked these questions a lot. There are three types of inspections associated with new-construction homes: pre-drywall, final, and one-year warranty. Today I'll discuss all three.
Pre-drywall inspection
The American Society of Home Inspectors (ASHI) has a Standard Of Practice for conducting residential pre-drywall inspections, and this is the standard that we at Structure Tech follow. You can find this standard online here: https://www.homeinspector.org/files/membersonly/docs/predrywall_standards.pdf
This standard says what's included, what isn't, what gets reported on, described, etc. It's very similar in detail to the ASHI SOP for home inspections, but it covers a different scope.
I'm guessing that most other home inspectors who conduct pre-drywall inspections follow this standard, but not all home inspectors conduct these types of inspections. Not even here at Structure Tech... including me.
Per the ASHI Pre-Drywall Inspection SOP, this inspection should take place after the following components have been installed:
A. Foundation components,
B. Floor, wall, and roof structural components,
C. Plumbing, electrical, and rough-in components,
D. Windows and exterior doors.

It goes without saying that this should happen before the drywall is installed, right? These inspections typically take about 60 - 90 minutes to conduct, and they're priced accordingly.
Final inspection
The final inspection is really a standard home inspection, but I call it a 'final' inspection in this context to make it clear that it should be done after the home has been completely built. If the builder is running behind on schedule, the home inspection should be re-scheduled. A home inspection conducted too soon in the building process will leave the buyer with a huge punch-list of incomplete stuff. Once that's all done, who checks it? Do you hire the home inspector to go out again? No, just have the home inspection done when everything is complete.