I am not a photographer; I am a writer. I am currently participating a story project with other writers where each writer writes a story about a storage unit in a storage facility. The character who owns the storage unit is a photographer, and I wanted to see if he may have turned the unit into a dark room. So far I have determined: no. There is no running water, and no ventilation. It just wouldn't be a practical space. But if it is at all possible to get around those problems, the character certainly would, so I wanted to check with some actual photographers. If all else fails I will simply have the unit be a storage space where he keeps his dark room supplies.