Plumbing question for ADU conversion

[Jacob Jenkot]

Hello BP!

I am considering converting a detached garage to an ADU. Seems like I should be fine my the city, but they are pretty incompetent, that's another story though.

So the detached garage sits on the alley where the sewer runs. It’s an old building and sits on at least 8 inches of a concrete slab (what I have seen visually during some landscape work.)

The structure does not have plumbing, and I would want  plumbing roughed in for 1 bath, kitchen and washer. I am not sure exactly how to ask a plumber for this service, if a plumber even the correct person to call for this. Would I ask for plumbing rough in?

Also, I am thinking this will be my most expensive part of the project. Does anyone have a cost break down from a recent ADU conversion in the Denver area?

Thanks