Any suggestions?

Where I am moving to, I don't really have an area I can grow in anymore (which REALLY sucks) but I was cleaning the place up today and I ventured into the attic. This is an Old school building where the attic is made of Huge ass timbers with no insulation. Right now in the house its a meer 55 degrees F and up in the attic you can see your breath. I was thinking that somehow I could utilize the attic space and grow up in there. I'm thinking that once the houses' heat gets turned back up to 70 ish degrees F that maybe it will warm the attic up. If not do any of you have some "safer" ideas of how i can go about in making a grow room up there and to keep just that area warm?
Thanks

u need like a tent or enclosure so you can controll the climate in the tent and not the whole attic. They sell them or make one.

A small walk in green house would work in there. But it has to be type of small enviroment where you can control everything. The temp, humidity, light, bugs, mold, fresh air, etc.

Well, See, I was thinking of buying some 2*4's and making a lil room typa deal thing but i don't know how to safely heat the area .... if I need to (which I'm sure I'll have to) so any suggestions on how I could do that? I'm a CFL grower through and through so I can't rely on my lights for the heat otherwise it would work out awesomely.