And talk to the person in charge of these things from the sales lot. Make sure he understands your instructions. Even after doing all this, it may be necessary to oversee these items yourself to make sure they are done the way you want them. And make sure the people from the sales lot have all these instructions in writing and that everyone involved has copies. Also, have the sales person or contractor involved in setting the house initial any special instructions or changes in instructions.
Documentation is crucial if problems and misunderstandings arise.
The electrical company will not hook up the electricity until the inspector gives them the ok. But, it is important to notify the electric company and order the light poles and everything necessary to hook you up. They can run the lines once the house is on the lot. Some companies offer a large light that can be mounted on your pole. We chose not to have this light in our yard.