It may be brand new, but that doesn’t guarantee it will be perfect….
Broken furnaces. Scalding hot water. Creaky staircases. Unsafe dishwashers.
Those are all issues I have personally seen when my clients are buying brand new construction. Please, take the time to have both a home inspection and a sewer scope done PRIOR to signing the closing documents on your new home. An inspection is just as important in a new-build home as it is in an existing home.