Marijuana plants need a warm, humid environment, so to prevent the growth of mold or pests, you'll want to remove all chairs, curtains, carpets, clothes, and other surfaces that could host mold.
You'll need an electrical outlet for your grow lights, as well as easy access to water.
Marijuana grows best between 72 and 77 degrees. Try to choose a room where it is easy to maintain this temperature. Too many windows can make a room too hot, while a basement might require continual heating.
A tile or concrete floor will make for easier cleanup of spilled soil or water.
Warning Grow Room setup can cause damage to your home so watch out for mold and electrical issues.