Miami Beach officials are backing Robert Rivani’s plan for an estimated $50 million rooftop addition to his mixed-use building at 1691 Michigan Avenue.  On Wednesday, the Miami Beach City Commission unanimously approved on first reading extending the ground lease into the next century for the city-owned land underneath the seven-story building known as The Rivani.  Rivani, who leads his Miami-based namesake firm, is dangling an annual rent bump to the city of at least $500,000, as well as $1.3 million for public benefits to obtain it, a city memo shows. He purchased the building and the ground lease for $62.5 […] This article originally appeared on The Real Deal. Click here to read the full story.