I'm no carpenter but I'd have to agree that building your own shed at those dimensions would be better AND it would be custom. The trouble would be pitching the roof if you were inclined to do so(no pun intended). You'd wanna go with a plastic or metal roof anyways because your eaves would need to breath if wood or your roof would rot. With a plastic or metal roof you could insulate the roof and not worry about rot.

If you do build one it is easy enough to insulate it with paperback fiberglass batting. Then just get some nice cheap 1/4" ply or wallboard and finish the walls. The temps can be dealt with, but it would take either A. alot of work or B. decent chunk of $ for a decent temp controller.

I'm also no electrician but there is ROMEX out there appropriate for outdoors and you could bury it to your new shed. Splice into an existing circuit, though I wouldn't recommend doing it unless you either have decent AC experience or get explicit instructions from someone qualified to do it. (May be harmful/fatal to yourself or others if not done correctly.)

Also there's what Stinky said, much to worry about. I don't know how your property is set up but there's nosey neighbors and possible intrusion/dectection would be your biggest concerns after all that. I'd stick to your house if I were you, but if you want a shed then it's definately doable just risky.
DNAero Reviewed by DNAero on . Grow shed Pros and Cons(Give me ur opinion) Ok so my plants are getting in the way inside my house.I am thinking about buying a plastic shed from home depot, dementions are 7.9 feet tall, 7 feet wide, and 3 feet 5 inches deep. (price is about 400)Big Max Jr. Shed - 371300 DPLAT at The Home Depot think id split it in half and use one side for veg and clones and other for flower.What do you guys think about this?Do you think it be hard to maintain temps?( i have heaters i could use in winter and id definitly set up exhaust fans and Rating: 5