Drinking water pipe from another house under the planned construction project

Under his existing driveway, there would also be paving work to do again. That really won't be cheap. The existing lines for the new building can then be reused if the lines are roughly near the later utility room. However, the lines must definitely be disconnected beforehand, and a new connection must be created. So the full house connection costs for the old building apply (+ costs for the proper route since there are 2 rows), disconnection costs for the old connection apply, and new connection costs for the new connection apply. There is little to save on the new connection of the new building, as flat rates are generally assumed here. You may possibly save a few meters of trench digging. A prerequisite for the reusability of the line is also that the line corresponds to the current technology on the property (i.e., PE pipe for gas/water, suitable cable cross-section for electricity).