After about two years since I originally posted, I'm reviving this thread. Maybe in 5 years I'll get it done. So, I know that people have built darkrooms in impossibly small and difficult places, which tells me that the moral of this story is where there's a will there's a way. So, one of the options (read: spaces) I have for my darkroom is a long hallway-type of space, about 40 squared feet of space. The measurements are 3'5"x12'. Let's make this more difficult. Let's say I am going to work in 35mm, maybe MF, and definitely 4x5 and 8x10. But why stop there? Let's also say I want to make prints in color and B&W, and I want to go as large as 20x24. Nice little challenge, no? I know there'll be compromises, but I want to hear what you guys have to say. I was trying to work it out in my head and I got a headache. Is this possible or not? I was thinking of putting the enlarger at the end of this hallway. Thanks.