Is it unreasonable for an inspector to conclude that a contractor has met the standards of the Building Code because the contractor says so?

In Ingles v. Tutkaluk, supra, an owner wished to lower the basement floor in his home. The contractor had to put underpinnings under the walls to hold them up. By the time an inspector got to see the work, the underpinnings were covered up and the inspector took the contractors word for it that they were properly constructed per the drawings. The court held that the city was not required to discover every latent defect in renovations, but it is required to conduct a reasonable inspection in light of all of the circumstances. It was unreasonable for an inspector to conclude that such a project had met the standards of the Building Code simply because the contractor had said so.