People are forever having plans to build something in the future, but for
right now just running the utility conduits.
So it would not be an unusual request to have just your empty conduits
inspected. Be sure to tell them in advance what you want to do and be sure
your sizes, depth of burial, and specification of conduit are OK.
Don't cover the trench until inspected. Have the writing on the conduit
facing up so they can see you are using the correct specification of
conduit. And might need to run a single electrical wire along with the
conduit so it can be located in the future. In some cases it would need
concrete poured over it. So best to check in advance about what is required.
Best to take pictures of the area to your meeting with the building
inspector along with a lot layout and a rough drawing of what you want to
do. Then he can "see" exactly what you plan to do and "see" the area.
Before digging, call a locate service so they can mark any existing buried
lines. This is usually free. (Don't want to dig into a natural gas line!)