Building tutorial

Today, I'm going to show you how to make a city block. First:
1. Open Maya
2. Make a plane by selecting the polygon under the polygon's tab
3. Select more than one face
4. Edit Extrude the faces
5. To Add doors and windows, you use the cut faces tool under Edit Mesh
6.Then select the face and extrude it

or...
 you can make a new polygon for the building instead of using planes