Some Thoughts on Mandatory Solar Panels

I do not presume to know the cost effectiveness of a policy such as this nor do I claim to know if it is good policy. But all the same it IS policy and I would like to know why we aren't having this discussion in the US (The Federal, Sate or Local level) ? Why isn't there laws that say that in order to build something you must have at some point during the building process a team come out (paid for by the government in question) to determine the feasibility of placing renewable energy production built into the building? They should then issue their report and recommendations to the owners, recommendations that they by now means have to follow but at least then they know the options.