I built my darkroom in my basement all by myself. It took me four months from putting walls up, till complete finish. The size of my darkroom is 14x11 feet. I have a hand made 3x8 feet wood sink, fridge, freezer, dry side is 14x4 feet table wet size 3x8 feet sink and 3x4 feet table. Three indepensent circuits with 16 plugs, three independent lights circuits - dry side, wet side, and safelights, air purifier, ventilation, heating and cooling.

Costs - around 7 Grand. I love it because I built it. Everytime I come, I feel my work.
My friend told me if I would hire a contractor, it wpould costs me twice as much.