I recommend you talk to someone who can build you a custom unit for this space. It will fit perfectly and give you the best possible look, with maximum counter space and storage.

You may order custom made cabinet to fit in perfectly. If you really like a lot that vanity which you already have, you may change the shape of the opening : add wall (tile/mosaic) on the one or both sides to make it narrower? Can you post some pictures?

I will take a picture tomorrow and add it. I did check with a custom cabinet maker. He can make a cabinet with 22 in center with one door and a set of drawers on each side that are 11 in wide. That seems really narrow for drawers. We need the center cabinet to accommodate the plumbing. Do you think making the center part wider like a double door would look better than small drawers on each side with a single door in the middle??

I don't think 11" is too narrow for drawers, unless it won't accommodate what you want to put in them. With all the stuff I have in my bathroom I'd love to have lots of 11" drawers. I'd say go for it!

Use a custom cabinet maker. He should be able to visually show you exactly what he is planning on doing. But it should be give and take. Come prepared with what type of sink and faucet you are planning to use and what the overall look of the vanity should look like. Houzz is a wonderful tool to visually communicate these things to a tradesman like myself. I always approch a project like this with function and utility first (it has to be plumbed to code etc) then the looks.

It will help to see pictures first. Three 11" drawers on each side and double door 22" may look too busy. One door in the middle may win.

here is a photo of the room. The opening on the left side is an arch so the wall depth can't be changed.

Hi Again. I'll let the designers comment on style:) As far as structurally it looks wide open. You should be able to fit anything you like into the space. The only limitation being the dimensions of the space itself. I would start with choosing a sink and work backward from there. Again I say find a local qualified "cabinet maker". The one thing that may be nothing at all, is that a heat register or air return on the right side wall? Just something to keep in mind.