I just saw another post that reminded me of a future project I am planning. I am also looking to take some existing space from my garage and convert it to living space. The current garage is 10 x 30 ft. I am hoping to take 10 feet to make a small 100 sq. ft room. The problem is the level of the garage floor is six inches lower than the slab of the rest of my house. I assume this is due to code. I am wondering the best way to raise ther floor in the new room to be even with the rest of the house. can I pour another slab over the existing garage floor? Any suggestions?