Creating a master suite floorplan design

I am looking for a space planner or architect to create a very general floorplan for me. I have as-built drawings of one portion of the house. I would like to convert two bedrooms and a small bathroom to one master suite with a bathroom and good sized closet. The plan should just show dimensions, partitions, doors and fixtures - does not need to be too detailed - I want to get a layout that works.