I agree that even at 12x12, things'll be "cozy" inside. That's OK. Keep in mind that this will be a general purpose hobby shed, not just a wood working shed. Even 12x8 would be plenty big enough for building 1 meter wingspan bungee launched RC gliders. And for the electronics projects I do, I only need enough workbench space to do some soldering with a 3rd hand (for electric guitar pedals). If I need more room than the shed offers for wood working projects, I'll just roll the table saw down a ramp and do my cutting outside in the sun.
This trade and technical college currently serves over 15,500 credit students from its campus in downtown Los Angeles. Through the Construction, Design and Manufacturing Department, full-time students can enroll in a daytime certificate or an Associate of Science program in cabinet and millwork. Evening programs for current craftspeople include a certificate program in construction technologies and an Associate of Arts in cabinetmaking and millwork that provide students with the skills they need to work in construction or manufacturing.
They immediately tried 2 of the projects, and first found that the instructions were a little vague (so many similar sized/shaped pieces - it was difficult to sort them!). The glue included in the kit had separated, and was not usable - but basic wood glue, which we had on hand, worked just fine. The projects turned out great, and, the time spent working on them was priceless!
Synopsis: No room in the garage? Basement not an option? Consider what Ken St. Onge did when he needed shop space: He bought a prefabricated shed and converted it into his full-time woodshop. Because a pre-built shed doesn’t need a cement foundation and is built in a factory, it’s much less expensive than building an addition or stand-alone shop on your property. It can have taller ceilings than a garage and bigger doors than a basement, both big pluses for a woodworker. You can put a shed just about anywhere, too. Here’s a soup to nuts look at Ken’s experience, so you can gauge whether a shop in a shed is right for you.