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2-car garage w/ finished upstairs | The Garage Journal
WEBJan 2, 2012. Messages. 3. Apr 3, 2016. #6. for new construction of such a garage structure, I would think $100-125 per square foot for stick-built is a good start. So, minimums... ground floor 20x20 = 400 sq ft = $40K to start. upstairs 10x20 (avg) = 200 sq ft = $20K adder. It will be *really* simple to drive up these numbers.