My wife has ordered a garden fountain for our backyard. There is no existing exterior outlet where the fountain will be located. However, the fountain will be located near the house adjacent to our living room. Is it possible for me to drill through the brick exterior and tie into the wall outlet from the living room? I am trying to avoid getting in the crawlspace, drilling through the foundation and adding a circuit.

Drilling into the wall cavity through the brick is very possible. Just need to be in the same bay (between studs) of the interior outlet. The problem is going to be fishing the wire from one outlet to the other.

You will need to make a knockout in the interior box. Not sure if you have plastic or metal boxes. Plastic will be easy, use a hole saw to drill a hole. A metal box will be more more difficult. You will need to try to pry out a knockout, and you will need to use either the cable clamp in the box or use a connector into the metal box.

TKRussell: question - is it OK for this outdoor branch circuit to be tied to an existing indoor outlet? I thought that outside power lines had to be on their own dedicated breaker, no?

Nope, only need to be GFI protected. It is bathrooms that need a dedicated circuit, maybe that's what your thinking of?

TKRussell: question - is it OK for this outdoor branch circuit to be tied to an existing indoor outlet? I thought that outside power lines had to be on their own dedicated breaker, no? Doesn't need it's own dedicated circuit in this case. Yet, it does need to be GFI protected.