Garage conversion

[shan2themax]

I am thinking about converting the garage..... it cant really be used as a garage, it has a 6X9 room built into it... I am wondering how I would go about leveling the floor. I have read that 2X6's would be best that way I could get a vent into the room... but how do I go about cutting them so that the floor would be level? and in approximations, how much would you say it would cost to enclose the garage, it is a 12X15 total room approximately.... cost of course wouldnt include electrical or plumbing at this point... I am talking framing, drywall, subfloor and carpet... (cheaper carpet, possibly hardwood flooring _laminate_)

 

[Square Eye]

Establish level lines near the floor all the way around the walls. The highest point being 5 1/2" or slightly less from the floor. Decide which direction you want to run your floor joists based on ease of installation of the duct work.
Stretch a string exactly where a floor joist will placed from the level line on one wall to the other. Measure down every foot from the string to the floor and write it down. Now is the time to decide if 2x6's will work. You may need wider joists to make the ductwork fit. Go buy the materials now. Transfer those measurements to the 2x that will be used as the floor joist. cut the excess off and lay it in place. If it isn't touching the floor, step on it and check it by the string. You may need to place a shim here and there. Use glue and Concrete fasteners. It doesn't really matter what type you use.
I hope this helps!