contact the local power company , and you going to need a certified electrician to do the job
Ok so I wont set off any red flags if I ask for more power in the back yard?
Depends on where you are by red flags.
Lots of work shops require more than enough power to run a
small mine and if you're building a workshop to run welders, air compressors, and other "shop tools" -- you're going to have plenty of power. Your city may have restrictions but its up to the electrician to advise you on what permits are needed if any and you would need to work through that.
Bottom line, you should have a professional evaluate your needs, provide a quote and then tell you what you need to do.