I have a 100 amp service in my house and want to run power to a sub pannel in my garage and I'm wondering how big of service I can make it. I was thinking of a 40 or 60 amp service, would this be possible? I live in house that has 2 2 bedroom units (each unit is approx 750 sq'). The units share the gas furnace, electric hot water tank and washer and dryer. The garage is one car (12x20), insulated with a small 4.5' high attic above, for storage that I will heat with a 1000w baseboard heater. The main garage area will be used for storage and as a hobby woodworking shop. Not sure yet how I'll heat it but I may just use a construction heater (240v) when I'm in the garage. In the future I would like to be able to run a welder and will most likely need at max a 220v 30 amp plug. Any comments from folks are most appreciated. I live in Vancouver BC.