I am in the process of thinking about renovating an addition on my house which would include a kitchen, informal dining area, basement access and a bathroom and am surprised at how difficult it seems to just lay the project out. I'm pretty handy and like doing things like this myself for the cost savings as well as for the learning experience. When thinking about the sheds that I have made I was surprised at how many assumptions I made in the design as far as ceiling height, door sizes, roof pith, entry stairs and ramps etc. It didn't seem to matter much because they were just sheds. For the home this tasks seems daunting in that you would seem to have to contact door manufacturers to get the dimensions for the openings, appliance companies, cabinet manufacturers, bathroom suppliers for proper toilet and sink placements, figure out the correct stair dimensions etc etc etc just to lay it out. Is there any place or book that you know of that gives you standard building dimensions such as the standard opening for a dishwasher, cabinet doors, door and window sizes, common stair pitches, ceiling heights etc.