House connections and preparatory construction measures - what order?

Hello dear community,

I am currently a bit confused regarding the ideal sequence of construction preparatory measures and hope you can shed some light on this.

Initial situation:
- A rear property is to be developed and built on (see drinking water pipe and general site plan as attachment)
- The house + garage on the front property are to be demolished and the property is initially not to be rebuilt
- The pipes for the new house are to run under the driveway
- We are building with a general contractor and have to/want to take care of house connections + construction preparatory measures ourselves

Questions:
(1) Would there be any advantage to "recycling" the old electrical and water pipes from the demolished old building initially for construction power and construction water? For the final house connections, as far as I understand, we would need a new connection to the street network anyway, so this probably does not save anything?!
(2) Can the final drinking water pipe, wastewater pipe, and electrical/media conduits already be laid under the driveway before the construction road is created, so that the access/construction road does not have to be reopened later? Could there be problems if 40t vehicles drive over these pipes?
(3) I assume that for drinking water, electricity, and internet, the asphalt on the street/sidewalk must be dug up to make the connections. Can this be consolidated/simplified somehow or is this simply the usual procedure?
(4) Is there anything to consider when creating the construction road so that the compacted material could be used directly as the base for the later paving of the driveway?

Thank you very much for your feedback!

1) You should best discuss with your suppliers. Usually, the water pipe is routed directly through the multi-duct and used as construction water. Electricity is initially laid overhead to the construction power distributor and then pulled later through the empty conduit. 2) I would definitely recommend installing empty conduits. A water hose can also be easily pushed through a KG pipe after it has been covered again. Electricity and internet anyway. I would also have an empty conduit installed for the 4th hole of the multi-duct introduction all the way to the sidewalk. Heavy vehicles should not be a problem if the pipes are buried deep enough. 3) Coordinate with the suppliers 4) You have to plan the height accordingly. Otherwise, there is probably no better compacted subsoil than a construction road. Then you only need to fill the potholes and put gravel on top.

You need to clarify with your local utility company whether they will pull electricity and water through empty conduits for you. But I don't think so, because the multi-duct is sealed gas-tight. Is pulling construction water through the multi-duct common? Construction water would then be inside the house? Never seen that before.

Is it common to run construction water through the multi-service pipe? Construction water is then inside the house? Never seen that.

It was like that at every construction site here. For masonry, you hardly need any water, the interior plaster needs the water anyway inside the house. Once the house is sealed, the construction water connection is protected against frost and mischievous youths. The plasterers then just run a hose through the window. Absolutely no problem.

I don’t believe that, because the multi-service pipe is sealed gas-tight.

That is also done everywhere here. Gas leakage is not an issue and there is an additional seal against water ingress.

Alternatively, for normal routes and construction in summer, you can of course first tap the construction water directly at the property boundary via a standpipe, later dig the trench for the multi-service pipe and then lay everything at once. In this case, however, that makes little sense, as the OP would then have to tear up the long driveway again and would definitely exceed the maximum allowable pipe lengths for the construction connections.

You are 1 meter below street level in height, and then there is a slope for wastewater on top of that.
Is there a lifting station before the sewer?
With us, the civil engineer/paver removed the topsoil,
dug the trench with the pipes (wastewater, electricity, empty conduits for water, telecom, garden and gate electricity),
constructed the construction road with sand and recycled materials,
and after construction, leveled and paved it.

You are 1m below street level in elevation, and then on top of that there is a slope for wastewater. Is there a pumping station in front of the sewer?

Exactly; there is a pumping station in the sewer and the wastewater is pumped up the street for every property on the street.

Our excavation contractor/paver removed the topsoil, dug the trench with the pipes (wastewater, electricity, empty conduits for water, telecom, garden and gate electricity), constructed the construction road with sand and recycled material, and after the construction finished it graded and paved it.

That is exactly how I had imagined it as well. Were electricity and water connected directly as well, or were the lines initially only laid up to the street boundary and then connected by the utility providers afterwards? What was done with the lines on the house side? At that time there probably was no slab yet?