Yes, a 3/12 pitch would be for every foot of run , you have 3" rise. So yes over 26' feet you would have a 78" rise.

" And, I'd like to pay for a second set of eyes on these plans. What do you all recommend for that? "

An architect if you can find one who will get involved now if you want a thorough review. Or an experienced GC. Your issue now is both of those are trades that either a) design a home or b) build a home and you have chosen your own route. So if they are busy you may stand zero chance of getting help unfortunately.

Post photos

If the plate heights are plainly shown on the drawings, and 3/12 is shown somewhere else, I doubt a framer would bother to calculate the required plate height using the alleged roof pitch. What kind of roofing and what do you calculate roof pitch to be from the plate heights shown?

Also for a house with 3/12 pitched roof you cannot use roof shingles. What is your planned roofing material?

Not according toGAF.

You are already in permitting? You are SOL. You need to withdraw the permit, and get the design fixed, which is going to take weeks to months, because no one will want to take this on.

Get your draftsman to fix it.

" Not according toGAF. "

I stand corrected Joseph. I remembered it as 3 1/2 being the minimum.

Thank you all for your input. Yes, sill plates are clearly marked at height. The draftsman corrected the issue today by simply raising the front wall, but, this will throw off my budget, all of my takeoffs, my ResCheck, interior tonnage, etc. Hence I have decided to keep the current wall heights and will install a standing seam roof at the lesser pitch. (about 2/12) I also found a local architect who agreed to work hourly to check and reproduce all drawings, hourly. (he likely agreed since my permit is already issued and I have CADD files). Since the only on-plan change is the pitch, I'm hoping that plan changes will be mild / not needed. This has been a stressful not even 24 hours! Appreciate you all for the tips this morning!

Here is the 'corrected' version with a 3/12. I don't like the balance of shake to clap.

Original plans under.

Rear el. (first plan, shorter house)

Check the lowest roof pitch recommended by the metal roof supplier and/or manufacturer.

Ask your architect if they think they can design a better house for/with you. I look at your current design and all I can think of is 1972.

Looks very commercial to me, almost like a small office building.

I agree with Mark and MWM, looks like an office building from the '70's. Maybe take another look at the whole thing while it's still lines on paper.

I was going to mention the commercial look also, but I did not want to be too harsh.

When I was designing my house, my draftsman made the second floor windows taller than the first floor windows. I told him that was bad design because it then made the second floor top heavy. Obviously, I made him correct it and tons of other problems

I suggest you engage a person of design talent to work with you, not a draftsman who will just spit out what you ask him to do.