[Zeke]

I can't find any provision in the code that requires control valves at the wall or floor in individual rooms. Only that fullway valves need to be installed where the municipal supply enters the building at at the cold water connection ahead of any water heater.

To wit: There are usually no stop valves to the shower supply. If you want to read in your own interpretation, consider that whenever hard plumbing is provided for the convenience of hooking up a fixture with flexible lines, a stop valve is installed just before that point of connection and simultaneously provides the transition of one fitting type to another.

IOW, it would cost just about the same to connect the sink w/o the stop valve.