Pricing on these type doors all over the place, but usually ranging from really expensive....to really, really, really expensive. Marvin makes a nice unit to start with. I think Andersen also makes a lift and slide unit.

Thanks WoW. So are we talking $10k? $20k? $50k?

It was not uncommon to see doors (material price only) in excess of $1,000 per foot in width (i.e. 12' door = $12,000 materials only).

Check out Centor or Lacantina this is the type of stuff they do..definitely is a costly thing and you need to reinforce the header for a large opening bifold door because the panels are top hung

I have recently found out about Fleetwood
as a cheaper alternative to LaCantina or Centor. Does anyone have
experience with their sliding doors? I am seeing $700/foot and up.

You would only want Centor if you want an integrated screen system which is hidden and part of the frame. Fleetwood we used to carry but had issues and no longer do. Check out Eurowall, they also do sliding doors. I just sold a 75K job to a Washington Redskins player using large Eurowall bifolds and we got the job based on the products performance ratings..what is your location? They may sell it installed..which is a huge plus because many companies arent set-up to handle that type of job or have never installed the product

I'm just outside San Francisco

As has been mentioned $1,000 per foot is a good general idea on cost. Plus the additional cost of the screen plus the labor to expand and install the door. If you are on the fence about the cost of the door price out the screen you will probably be surprised.

In addition to the bifold doors and multi panel sliding glass door you could do a 4 panel door with the two center panels that open like a french door and matching side panels all in the same size.

Provia can easily make a setup like this and are considered to be a good quality door. A retractable screen that you slide across the opened portion is available.

Here is a picture to give you a general idea. Doors can swing in or out per code requirements.

Keep in mind- you are not adding a door. This is a whole new wall. Size (panels can be 10 ft tall) , Sill prep (no tripping) , operation, furniture placement, overhangs, locking mechanisms, hardware, T-24 (in northern California ) installation (sliding panels can weigh 300 plus pounds each), framing of new opening (sliders jamb depths can be 15"), accessibility to opening (two story installs), truck delivery (Centor and others comes in a very large BOX that needs liftgate for delivery)----- all play LARGE parts in the per sq.ft cost. Yes very easily can get up to $1300/ft with integrated screens (9 times out of 10 screens are an after thought and the retrofit solutions are an EYESORE on a beautiful wall unless they are planned for). And last but not least SERVICE!!! Not all companies service their doors. Especially online purchases. Pays to do it right we have found.