You can also consider a semi-recessed sink that protrudes a bit from the counter. Mine is made to be accessed by a wheelchair, so comes out further than a lot of them do. You can find lots of semi-recessed sinks from European manufacturers like Duravit and Nameeks. Mine is from Sbordoni and my counter is 16” deep. But you don’t even need to do that. There are hundreds of 18” deep vanities out there these days. Many are “console“ style like this one: But there are plenty of floating vanities and regular vanities available that are only 18” deep. SignatureHardware.com has a bunch. Or go to the for sale part of Houzz, or to QualityBath.com, Build.com, or any bathroom site and adjust the search parameters to 18” deep and the width you want to see what is available. You absolutely do not need a wall-mounted faucet. As for how much space you need for clearance around the sink and faucet, it all depends on who is doing the countertop. If you are having a local stone company do the top, ask their rules. I tried to work with a couple of the companies near me befor buying my sink and just gave up. Sales people often have set numbers for where it “should“ go and cannot answer questions for non-standard sizes. I tried writing very specific questions to the actual stone cutters to help me figure out which sink to buy and got nowhere. No one would answer at the place that had my quartz. That is how I ended up with a walnut counter. My carpenter is a genius and I knew he could cut those angles for me. You may find it easiest to buy a vanity with the top included. I did not have that option because I needed to wheel a chair underneath my vanity.

About to start bathroom remodel and I'm having a hard time finding a self rimming sink w/4" holes that will fit into an 18"deep 36" wide vanity. Any ideas as to the max size I should be looking for or suggestions to particular sinks I might look at?

That size sounds good. I have seen them undersized to take advantage of counter space and it's not a good look. The Ladena that ck_squared has is a very popular sink in Houzz photos. It gives you a rectangular sink but with a sloped bottom so that water and toothpaste goes down the drain easily.

Thanks! I figured out by talking with designer #1 that the dimensions of the 17 x 14 kohler 2210 sink, at its widest point includes what she called the flange, which lies "flat" against the underside of the quartz vanity top. This is what makes it 19.25 at the largest point. The part of the bowl that goes down into the base is 17 inches wide at its widest, and she was not at all concerned about it fitting. I can only assume that this will fit based on that. So then I went to the counter fabricator and they feel that that kohler sink will fit, but they will know for sure when they come to template. In that case, if it does not fit, they would use the the smaller 15 x 12 Kohler 2209 (17" at that largest undermount area). I looked at the sink while there. So I think it just depends on how high the draw box itself is to the top of the cabinet...and I would imagine the draw box wouldn't be flush with the top of the cabinet. I have an old style top mount sink so I measured my current sink opening and it is 15 x 10 !! So even the smallest sink i mentioned above is bigger than my current, so now I'm no longer worried about that! Whew, that's a win! LOL