Hi,

OP here. It was a verbal communication. I asked for an outlet on that
side of the vanity. The exact location of the hydronic heater was
decided upon at the same time. What the contractor knew but didn't
acount for is the fact that the heater will project 4.5" from the
wall. By the way, here's the pictu http://freeboundaries.com/heater.jpg.

BTW, I totally agree with the poster who disagreed. A clear verbal
communication must be sufficient.

If you'd like to know how the story ended, when I pointed out what
happended to the contractor, he said: "Oh, how did we miss that. Let
me move it."