A  good  investment  is  measured  by  benefits  it  gives in  return,  and  so  financially  viable investment  is  an  elementary  requirement  for  the  stockholders.  Cost  and  affordability  have been  often  pointed  as  the  greatest  barrier  in  sustainable  construction  development  [1]  and further often brought up in the discussion about the  “sustainable”  or  “green”  investment profitability. It is therefore important to collect market evidence to facilitate understanding and evaluation of environmentally conscious investments in real estate.