The interviewer is testing your depth of knowledge when it comes to residential home building. In short, a House-in-Progress report is a checklist or tool used by a home builder to ensure that everyone is on the same page as far as expectations and deadlines go.
These reports are especially helpful for construction crews, project managers, and customer service/sales teams to maintain clear communication. Even if you are new to the residential home building industry, you should have a basic understanding of what should go on this type of report.