Sure. We just had our house remodeled, so we had the contractor build that little false wall next to the sink in drywall. He turned the studs sideways so that we would maximize the cabinet. So when we started it was just a little wall jutting out into the bathroom, but other than that it was drywall inside like everything else (we didn't have to bust into anything existing). I ran some vertical wood up the four "corners" of the inside of the closet. Those four framing members support everything in there. Then we built the faceframe out of poplar dimension lumbar, using dowels to attach the stretchers between each drawer/door opening. I used the faceframe to plot out where the pieces of wood would go for the drawer runners and where the fixed shelves at the bottom of each door opening would go. Then we nailed the faceframe to my vertical framing members, which were set back just enough for the faceframe to be flush with the front of the little wall.
DH built all the doors/drawer boxes without me. That seems insanely difficult to me, but he uses straight pieces at the corners, not miters, so I think that makes it a bit easier. He has all sorts of fancy planes for making the trims and rabbits for the plywood panels, but I think a router would be faster/easier. All put together with dowels. I made the drawer fronts by planing down dimension lumber bit-by-bit and using dimes as spacers for the gap around the drawers, and they are glued to the front of the drawer boxes.
As for the shelving, I drilled at 1-inch intervals all the way up the vertical framing members and used 1/4" dowels so that we can adjust all of the shelving inside the cabinets.