DKT (et al)
Great advice. I will be revisiting this thread with a new layout implementing much of what has been suggested.

In the interim I need to pursue the ventilation, the available floor space and drainage options.

I also need to look into or see Bob Carnie about his drying racks. Having them in the darkroom would be a major plus. I have never liked curly prints and don't like the big drum driers either so I may start a thread or search for an existing one that covers that subject.