"This tutorial is a general but step-by-step introduction to quick architecture modeling with Blender. It is focused primarily on architects who never really used Blender but know some 3D and who want to see how Blender can be used for their particular work.
Blender users who are not used to architecture might find it useful too, although probably very simple. I will try to go slowly and explain everything, but there will be a couple of little things you will need to find out yourself... I am sure it is not hard and by searching a bit you'll quickly find your way."