Dunbar - Wet plumbing is allowed here - if done correctly. That's what I wanted to know, whether or not it was done correctly or not.
psjr56 - The vent stack is at the bath sink; the shower and toilet are wet vented from that and the sink in the kitchenette will have a vent going up into the attic and tie in horizontally to the bath sink vent. I don't have enough room at the roof line in the attic to put in the vent lines for the shower and toilet in the wall behind them. What "non-bathroom fixture in the middle of a bathroom wet vent" were you referring to? My city goes by the UPC, if that matters.
jimbo - Yes, both vents go vertical up into the attic.
hj - I think I saw that episode!
The code does allow 2nd units. The city wanted me to go to the expense of hiring an architect to do a complete plot plan showing landscaping, existing layout, etc., etc. I explained to them that the structure already exists(they would not accept pictures accompanied by a detailed & accurate sketchup from a home design program) and nothing on the exterior of the property would change; it would only be the addition of plumbing and other fixtures in the interior of an existing structure. They also wanted me to install a carport in front of my garage along with other misc BS. So, it went from $750 in permits and "no problem" to over $2,500 in permits and at least $4-5,000 in additional work - before I spent anything on the plumbing and other improvements/fixtures on the interior.
That being said, the jackhammering has already been done(took most of a day) with no complaints! The neighbors on my left and right already know what's going on and have no problems with it-one also has a studio they rent out(permitted years ago before the additional requirements). If I do get complaints and the city comes out to have a peek, I just want to make sure the guts are done correctly so there will be no problems with that. I'll worry about the rest if it becomes a problem. So, any wisdom on the plumbing layout?