We know that permits have to be displayed at construction sites. What we don’t know is if putting them 15 feet off the ground where only people on stilts can read them is within the letter of the law. The always roving eyes of our Greenpoint correspondent found the building in question, which is located at 988 Manhattan Avenue. Of the building itself, she writes: “The original one story structure looks iffy enough, the two stories piled on top of it look precarious at best.”