Modelling Building. 1

In this assignment I have been asked to do Block 2 which includes the student halls, canteen and the registry building.

Here is a image of my buildings i need to make on Maya:

These are the buildings I have been assigned to do. I have labeled the buildings in this image but it's not very clear the canteen is on the left and the Student halls is the upside down 'L' shape building on the right and the registry office is the small building in between the two buildings. I will have to pay attention to the different levels of the building because it is on an un-even surface.