I am buying a newly built home with a long counter in one of the bathrooms. I asked the builder if he could add another sink and tie into the existing service and drain lines under the existing sink. He said it would be very expensive and he would have to install additional drain and service lines. Since one sink is already there (with exposed plumbing under this sink) how difficult would it be to just tie into the existing plumbing? What is a ball park estimated cost to do this? Would the builder have to pull a permit (home is in Texas)?
THANKS
THANKS