When looking to upgrade your bathroom vanity for a smaller, tighter space, there are a few tips you may want to keep in mind to make a small bathroom seem bigger than it is....
-install white/lighter coloured vanity countertops
-consider purchasing a non-standard sink shape to better fit in tighter spaces (rectangles, long ovals, squares etc...)
-use lighter cabinet drawer shades
-leverage under the countertop space to hide supplies etc...
Here is a picture of one we completed recently...it is only 18" deep, but a more than wide enough sink for the space...Take Care...