1. A method of assessing building structures with a computing system comprising: a. providing a first reference file containing first image data for an outside portion of a first target building structure; b. providing an electronic structure classifier programmed and trained to process said first image data and perform at least the following operations: i. detect a plurality of individual building elements in said first target building structure; ii. rate a condition associated with each of said plurality of individual building elements; iii. assign a first rating to such first target building structure, which rating identifies one of an occupancy prediction, a purchase prospect score, or an overall exterior physical condition of such building structure.