A floorplan alteration may involve the removal of a wall, or part of a wall, loadbearing or otherwise; Or walls, plumbing and electrical work may be added or removed. 
Most local jurisdictions will require a permit for work that involves "repartitioning", electrical or plumbing.
Partial images of sample drawings for some actual Floor Plan Alterations are included below. 
Drawings may not be reproduced; And, they are only to be used for the project and site identified in the drawing set.