Framing door from scratch
 

I was told from builder that door to the garage from inside house is ready to install. That means frame was done inside drywall. So I went ahead to crack the drywall from the garage side, leave inside drywall as is.
And I realized that there is no frame. I noticed no header up there. There is just 16"apart stud.
Now I have outside drywall open and I gotta get this donn somehow.

I NEED HELP!!!!!

Can I knock down middle stud and build trim stud and header and so on? Kinda I think backward.
Than my rough open will be too narrow.

What should I do to get my door done?

Going to have to cut the sheetrock out far more then one stud bay.
It's easyer to cut it from floor to ceiling, much easer to patch a new piece in.
http://www.ezhangdoor.com/properly-f...-rough-opening

To determine what/if you need a full-size header, you need to figure out if the wall is loadbearing or not. If not loadbearing, then a 2x4 on the flat is fine. If loadbearing, then you will need to frame a loadbearing header.

Job well done. Thanks for all guy reply me.