Looking to Install a Vanity in bathroom that has never had one

[Tommy Volpe]

Hi Guys,

The bathroom that I am fixing up (only 30 sq ft) has a large tub, and a toilet in it currently. I am taking out the tub and putting a stand up shower in. I want to install a sink (vanity) next to the tub seeing as there is not one there right now.

It seems that there is a water line running to the toilet (not large enough to be  waste line). Is it possible to tap off of that water line and run water to where the sink would be? How much would this cost? If anyone has ever encountered something like this, I'd love to hear your suggestions! Thanks!