I'm looking at building onto my garage to form a dedicated shop. I have a good idea of the size I want and can have due to lot limitations, electrical needs, windows, and general layout. What are my options for getting plans done? I'd like something of sufficient detail that I can go to contractors and say "Give me a bid on this basic plan, plus a breakout cost for these potential additional features."
Do I need an architect? Are there other options? I suspect that this won't be as simple as, say, a rectangular garage due to things I want like an in-slab trench for running DC pipe and electrical lines to the center of the shop, as well as keeping this as wide open as possible clear to the roof.
Thanks...
Kirk