[mockingbird812]

Propane is cheap round here so that is what I used for heat - installed myself as it is fairly straight forward. Very toasty and warms up quickly. Ceiling fans are beneficial in maximizing heating and a/c (turns the air over). Window a/c (110V) takes care of cooling in my 2.5 car (500 sq ft x 9'4" tall) garage. Concur on electrical outlets - you will never say that you installed too many. Allow for 220 outlet for best efficiencies for your compressor and other high draw equipment. Don't skimp on insulation, it is relatively cheap and pays you back in extreme temps (hi or low). Concur with 2x6 walls for additional insulation. Ensure you have plenty of lighting as once you start putting stuff in your shop you will find lots of shadows that need to be addressed. Would go with strong trusses with at least 2x6 or greater construction in order to store in your attic if you have one. Consider putting your windows up higher toward ceiling for natural light and minimize prying eyes and potential ingress points for the baddies. Research yr electrical power and compressed air requirements (type and positioning in your garage) when considering your lift(s). Consider lots of air drops inside and maybe an air drop outside for access to compressed air for outside projects. Consider isolating dirty machines (grinders, cutters, wire wheel, welding, etc. in a separate room to keep from messing up the rest of the shop. Isolate your compressor for noise. Go visit as many garages as you can and make note of things you like. Ask them what they would do differently. Have fun and make sure to post your build here!