Hi all - new to the forum but see lots of useful information here. Was wondering if I could get some advice/counsel. I've been thinking about putting up a cold storage pole barn on a concrete slab but would like to have an insulated bathroom (with shower, sink, stool), mudroom (with sink) and wash bay with floor drain. I've created a rough layout of this but am looking for technical detail that would help me submit for a building application. I've tried calling multiple plumbers and understandably, everyone is more than busy and no one is interested in 'talking' about a plumbing rough-in without some guarantee of a job Attached is the layout...any professional guidance is appreciated!