Every city climate action plan I have ever read references moving to zero energy buildings as well as more stringent or zero energy building energy codes. These are great plan elements and certainly are “doable” things to include in a plan. That said, zero energy buildings are not all that easy to accomplish across the broader market, and they certainly won’t happen without a substantial supportive effort.
The commercial buildings market is very complex, with wildly divergent ownership, management control, and building characteristics. Buildings range from strip malls to office towers to convention centers to big box retail stores. Ownership could be local government, merchant builders (who build and then sell), local family businesses, international corporations, and fast food franchises. Each ownership category makes decisions very differently from the others. Some commercial buildings are incredibly complex, some buildings are cookie cutter simple and repetitive.