Building plans with uneven walls? And different wall thickness?

I am trying to draw up building plans of my house for a building permit. But when I measure out the lengths of my walls the ones parallel to each other are not the same size by several inches. So I am assuming they are not build on perfect 90 degree angles. Also my interior walls are not the same width through out the house. Some are 5" and some are 3". Now when I look at building plan examples the interior wall are uniform width and have 90 degree angles. So my question is should I draw my plans with uniform walls in width and angles; while labeling the walls with the actual lengths even though they might not equal the same?