What Can I Build With This I have a set of LEGO pieces that I bought second hand. I know it's a full set, because the bag was unopened, but I have no idea what I'm supposed to build with it.
Based on the occurrence of the 2x2x3 brick in white and the 16 trans-blue garage door panels, I think this is a bag from set 7744: Police Headquarters.


From the picture it looks like your bag builds the bottom right part of the station - the 2 car garages and the platform under the stairs.