I'm not going to go into particulars about the studies and how much it would cost to produce solar panels if it weren't subsidized. Let's face facts: you wouldn't be in business.
I would make a comment, though, on LEED buildings. I looked at building a LEED building in downtown Fort McMurray, and the prices I got were substantially more than conventional construction. In fact, the price I got was $32 million, compared to somewhere in the neighbourhood of $27 million.
Would it be fair to say that a LEED building would cost somewhere between 20% and 30% more than a traditional conventional building?