811 will mark up to your power meter (wherever that is located), water meter, and telephone box. 811 will not mark any utilities after that point. For example: Power to various out buildings, the water line entering your house, or the sanitary lateral heading to the street or your septic tank. Hole In One locating can mark all of these utilities for you, and also give you an estimate on how deep they are buried.
The above is also true for commercial and industrial. Everything is based on meter placement. 811 will mark up to that point, and then you will need a private locater. If in doubt, call us