enduring - our shower is 5' X 5' which is wider than one planned here. If they got the right kind of vanity, similar to Ikea's Godmorgon (which we used), it is floating, they could get beneath to clean there. If their countertop guy was able to cut the counter so there was no lip on the side where the glass is installed, seems like counter could be butted against glass and caulked above and below and along front to "seal" middle part. But still a bit risky considering caulk needs to be resealed periodically since it isn't meant to last forever. Would kind of spoil a shower (if it was mine) if I had to look at "junk" along that glass wall though at least it wouldn't be obvious when walking in the door. Also, houses usually aren't exactly level, could be some movement between vanity and glass - might not be a good thing :(

I think I will go for the shorter vanity and leave more space for ease of cleaning. I believe our final choice is this one, it is 84" so will leave us 10" on each end. I also verified the legs are 5 & 7/8" tall so plenty of space for the Roomba to fit (it needs 4") to my joy. This is our master bath opening off the bedroom. We are also doing the guest bath, it currently has a 66" vanity with the toilet beyond and then tub across the end. The tub is staying here just doing the floors and vanity, here it is now: and for this room we picked a 48" vanity to center under the light fixture, which will leave 9" between the vanity and the wall on the left and an additional 9" of space between the vanity and toilet, or we may be able to sneak the vanity an inch or 2 off center to the light to give 10-11" between the vanity and wall. It will provide space for a towel ring to hang nicely, especially since the vanities are shorter on the ends. Now the question is the vessel sink model - DH immediately picked this version and loves the look of the vessel sinks. However the vessel sink version is actually a few inches shower at the counter (28.13" on short sections and 35" to top of vessel sinks) than the sunken sink version (31.63" H on the side/center areas and 31.63" in the sink areas. We would actually prefer a height closer to 33-35" for the counter, perhaps we could switch our the legs with something taller. My other concern with the vessel sinks is the square/flat bottom and the fact that DH's shaving whiskers will tend to linger, while the sunken sinks are rounded toward the drain:

"If you are building a vanity along the same wall as a shower, what is the closest you'd want the end of the vanity to be to the glass?" Depending on how you want to interpret code regarding the sheet of shower glass being a wall, code says IF there is going to be a gap, the minimum is 4". There's another number, which is a minimum of 15" between a side wall and the center line of the sink. In my jurisdiction, the shower glass is considered a wall and those measurements are enforced. Your mileage may vary. "Is it ever OK to have the vanity top pressed right up against the glass? I imagine you'd have to put a bead of some kind of caulk or sealant to keep water and such from seeping into the gap that is there even if you can't see if because the two are touching." Yes, they can touch, and yes, a bead of caulk sandwiched between the glass and stone could be useful. It'll act as a cushion of sorts between the glass and stone and it'll prevent seepage between the two.

In the photos you can see what I did in our MB Ensuite. The glass is bespoke and cost no more than an off the shelf enclosure. Go for 10mm thick and with a Ritec coating, or equivalent. As for cleaning, a quick swipe with a window squeegee will keep it pristine. The glass was fitted first and the tile after. The first 40mm of glass was given a light sand blast so the sealant is less prominent and you can't see the cut edges of the tile. Good luck, Ken