In order to apply siding to this dollhouse, you must dry it your side porch trim so that your siding sits flush to it. I unfortunately realized this after starting the bottom three rows of siding and now there is a gap between the porch piece and my siding down there. I am hoping it will be hidden once I paint the siding since I painted the wall before siding it so any little gaps would be less visible.
I used a basswood strip to make my lap width guidelines. It seems to be the right width. Of course siding lap width is one of those things that you have to leave up to personal preference. Some people like thinner lap widths and others wider.
I took my siding all the way up to the area where the gable begins. That's where I stopped and added a white trim to separate the two areas.