Countless calls come in for us to come out and patch stucco due to careless plumbers carving up a wall to fix a pipe. STOP LETTING PLUMBERS CUT THE OUTSIDE OF YOUR HOME. Drywall is a fraction of the cost compared to your stucco wall. In order to match the stucco finish, we will be required to run that stucco finish coat from joint to joint, (an entire panel). You will save hundreds of dollars by having the wall cut from the inside.
If you absolutely must cut into the wall, please be sure to have your contractor cut with a diamond-bladed grinder. Do not hammer or chisel out the wall. You will only create more issues.
A bit of time and care can save you money. Please be sure to pass this along to your friends.