Buildings again

Well once I completed outline models of the three buildings I was not happy. Firstly the main station building looked too small. So I tweaked the drawing and it scaled out better to a few of the dimensions on the drawing. Ok I am happy with the re-scale and built a new model. Now looking at the platform building it just does not look right. In my view it looks too big. However when I scaled out the floor plan it seams to be correct. So out with ruler again! Floor plan correct  but elevations probably wrong. So where do I go to now. Is there a point on the building that could be used as a reference. One item that stands out for me is the size of a door. So 6ft 6ins high or 26mm. What I will do is scale the elevation to get the door size correct and then re-draw the elevations to match the floor plan. Hopefully then all the buildings will match. We wait and see.