And just for the record....it can be added to as well (but in the middle of a run casey's idea is much better!!) I had a 15" deep cabinet with exposed sides turned into an 18" deep cabinet. It's nearly invisable (if I tell people where to look they see it, but normally no one can tell). But it was a bit pricy. Not as expensive as a new cab would have been (it was an antique and solid walnut) but it can be done by a professional. Again....no need in your case but I thought i'd share. FYI

We have 15" deep uppers on one side of our Kitchen with standard depth base cabinets (24"D) and counters (~25.5"D) - we have no issues and I don't notice them when I'm working in front of them - and we're a tall family (I'm 5'10" - the shortest!) We have 12" deep uppers on the other side of the Kitchen and I wish we had gone with 15" deep on that side as well! I work primarily on the side with the 15" deep uppers (our Prep & Cooking Zones). Regarding the depth - it should be 18" from the bottom of the light rail to the finished counter so standard small appliances will fit under the upper cabinets. Most countertop small appliances (mixers, coffeemakers, etc.) are designed to fit with an 18" backsplash. If you want to go higher, consider whether you can reach the cabinets (as was mentioned earlier). I probably wouldn't go much higher if you plan to sell in a short time. Lily'sMom - IKEA uses a rail system for mounting cabinets.

Thanks for the ideas mayflowers. I definitely realize that 9" drawers are small! Believe it or not we have 6" and 9" drawers in our master bathroom right now, not by choice, and my 9" drawers feel very roomy compared to the 6" drawers my husband is stuck using. I figured the 9" drawers would be able to hold some of the basics like toothbrush, toothpaste, and a few odds and ends. Right now all of those types of things are stored in the cabinet over the toilet, which doesn't seem like the best scenario for every day use. I will definitely reach out though to find out the exact inside dimensions of the Barker doors. I also realize that 30" drawers are huge. I was just looking for a way to fill out the rest of that wall. The wall where the pedestal sink is now is only 21" deep total on the tub wall and is only 18.5" deep from the corner to where the tile starts. I was thinking that I couldn't do an 18" deep vanity there. With the 1.5" countertop overhang added on to that would push it into the tile. I do like the idea of centering the sink but was just concerned about it feeling cramped. I wonder if I centered the sink and then bumped the vanity back to 15" deep on either side might work out well. I do think that the scones through the mirror sound lovely. If you did a 36" vanity, would you use a 24" sink base and a 12" drawer?

I had the same issue with my sink. Plumber put faucet and soap pump on one side and on/off lever and sprayer on the other side. I thought I would hate it but I don’t. My utility sink in the laundry room has a one pice that’s also located on the side. Works out well.