Building Inspection costs in Sydney is usually $300 to $500, based on what size your home and where you reside. Even though hiring twice may appear like a lot of money, consider the situation in this manner. If you opt for an inspection before the drywall is put up, The inspector will ensure that the studs, insulation home system, beams and posts are put in place correctly. It's a peek that home inspectors can't inspect homes until the walls have been put up. If there are any issues, it's possible to take the list of complaints and problems -- a punch list -for the builder and ask him to address the case before closing the walls.