The length of a building and pest inspection can vary depending on the size and complexity of the property, but on average it can take anywhere from 1-3 hours to complete. The inspector will carefully examine the interior and exterior of the building, including the roof, foundation, walls, floors, basic plumbing components and failed waterproofing membranes, and any outdoor structures. The inspector will also take the time to explain any findings and answer any questions you may have about the inspection. It is important to allow enough time for the inspector to complete a thorough examination of the property, so you can make an informed decision about your purchase.