Definitely need to know the rules up front. I did a lot of homework before building my 40x60 shop. Peak height is another parameter as mentioned above. In my experience take the size of shop you think you need and add 25%. Then you might be close. I also put a mezzanine in one of my back quarters. Best thing I did. Floor space is king so all the storage stuff and seasonal toys go up top. I built about 4 years ago and the complete building heated/insulated and concrete inside and out was $180,000. Full tin interior so easy to keep clean. Worth every penny.