I'd check what size those skinny long bathroom cabinets are. Put one of those where the dead space is now and go with the largest possible vanity in the location of the current one. I don't think the vanity needs to be centered.( linen tower cabinet)

That was going to be my suggestion too. In other words, a pairing like this.

Aria 36" Bathroom Vanity, White, Carrara Marble · More Info

Bathroom Linen Free Standing Storage Cabinet · More Info

Tall Bathroom Storage Cabinet, Slim Linen Cabinet for Bathroom Organization, Stockholm · More Info

The PROS here might be able to answer this, but…depending on the location of the toilet’s plumbing, it might be possible to swing the toilet around so that its back is against the wall where the vanity is located, eliminating the shelf. Much depends, I believe, in the location of the toilet’s placement in the joists, and the direction that the joists run. It might be possible to, thus, relocate the toilet to the space next to it. And also relocate the feed line for the tank (since there is a water supply to the vanity in that wall.). Of course, this might be more expensive than you want it to be. And would require the demolition of your tile floor, etc.

Your plan to change the vanity and mostlikely also the mirror and lighting but are your replacing the tile floor?

This is a small guest in our Florida home. We had a vanity that spread across like yours. We replaced it with this vanity and most importantly have a left off-set sink. You might not have to.

This is a small guest in our Florida home. We had a vanity that spread across like yours. We replaced it with this vanity and most importantly have a left off-s

Here's what the powder room could look like with a 30 inch vanity and a freestanding linen cabinet...

Select a vanity that you can run all the way across. You might not be able to open the one door all the way but you don't need 24" for a wastepaper basket.

One option is to install a banjo counter.

A nice vanity and a set back linen tower.

I agree with @BeverlyFLADeziner, run the cabinet the entire length and put infrequently used items in the cabinet that won't open all the way. You could also do a base cabinet for the sink and then a cabinet of drawers to fill in the space to the right. One of the drawers will open fully as it will be above the toilet, the others will open almost fully. Judging from the number of floor tiles between the toilet and cabinet, you have almost 24 inches between the two assuming 12" tiles. That's a drawer depth. Even if they are 8" tiles, that means the drawer will almost fully open.

On the other hand, if you have a cat, perfect place for a litter box!

Thanks for everyone's input, especially the photos! That helped a lot. I think we're going to try doing a 36" vanity with some sort of freestanding shelving unit there and see how that goes. Also, @lisedv who had commented above, no, we're not replacing the tile floor. In fact, that was another issue because we don't think the original builders tiled underneath the vanity. Just another complication to make it more difficult. LOL

@ eld6161 -- can you open the drawers in that vanity?

@ ptreckel -- I don't think there's enough width for toilet on the same wall without a *smaller* vanity, because you need 30" total for code.

Check what we have done with these small bathroom. hopefully it will inspire you.

Guest Bathroom · More Info

Interior View · More Info

it will inspire you.