I'm finishing some planning on a nice wine cellar in my basement. I will need 2 walls poured, approximately 12 feet and 10 feet. I want 12" thick 5,000PSI concrete with #5 rebar 6" on center, 8 feet tall with a 12" thick poured ceiling.

I would appreciate a ballpark on what you think that should cost.

existing home?
professional concrete crew? or DIY

will be very expensive, if you can even find a contractor to do it, very expensive

If this room was going to be a gun vault it would be worth doing, but for a bunch of squished frigging grapes? Get real, ought to be a law against wasting fine concrete.
JK

It's an existing home. Professionally done.  It would be pretty easy for a concrete truck to pipe in concrete however.

Dude you are on a gun forum, just fess up and say you want to add a gun vault.  Then show photos because we all love gun porn.

Then you'll want to call a local professional and discuss this with them as opposed to an online forum.  There are many factors that will impact your feasibility and cost, and only somebody looking at it with their own eyes will be able to tell you what you need to know.

Wall of that construction would hold a substantial door.  A real bank vault door.  No need to go through all of that effort if you aren't planning on using a real door, or due to your circumstances, a real door can not be placed within your existing structure.

We did something similar about 2 years ago locally.  An existing home where we formed a room in the unfinished basement.  It was fairly fancy, and he was probably into it for $30-$40K.

Thanks for the advice. I did ask one contractor. I really don't want lots of people to know what I building and where it is. I'm sure you can understand. I just wanted a ballpark figure. The door has been pretty easy to price out. I'm not in the construction business. I do help people here with questions in my areas of expertise.

The word you are looking for is "Tornado Shelter"

The costs will vary from county to county let alone from state to state. There is only one way to find out and that is to call around to the poured Wall places inyour area.

... Couldn't tell you. But have a wine cellar built into one wall in my basement 

Of course.  Only one call needed.  Whomever does the bank vault work in your area.  They'll know the contractors (if they don't do it themselves), have the experience, and it will be confidential.  It's a lot more complicated that pouring some walls and slapping on a door.  Trying to do it yourself, or hiring somebody who isn't experienced as they claim often leads to problems.

I encountered one just the other day.  A door that a contractor set himself that wasn't done properly, and now it was out of plumb and wouldn't lock.  Had the owners hired a guy like me from the beginning it would have been easy as pie.  For liability reasons, I wouldn't touch it after the fact.  Too many unknowns.  Now they have a fancy room with a fancy door that doesn't close.  They ended up buying a gun safe to put inside their room.

For your project, if done as you describe, you're looking at 45,000 pounds worth of concrete.  That's a lot of weight that will move (sink) if not done properly.