Development of Rear Construction: Combine Plots or Not?

Hello everyone,

we want to buy the plots 47/1 (with a residential house), 46, 47, and 48 from my wife’s grandmother (90 years old) and register a lifelong right of residence for the grandmother in the land register. Grandma, parents, and uncle agree to this. The plan is to build a single-family house on plots 46, 47, and 48, and once the grandmother has passed away at some point, to renovate the house and rent it out.

Building in the second row is permitted up to the dashed line. Access to the plot is via the built-over courtyard entrance (pink marked area). To be on the safe side, we have submitted a building inquiry. All neighbors have already signed and agree to the building in the second row. Nevertheless, the district office is taking its time and will only send us a response at the beginning of February.

Now the question for me is how to develop the plot in the second row as cost-effectively as possible and whether it might be sensible in this context to unite the four plots and not just the three rear plots.

Electricity:
I would like to get electricity from the front house or have myself connected in parallel to the existing line there and lay the line myself to the rear plot. In the front house, I would also like to install the meter for the rear house because I want to install a photovoltaic system on the front house in the future. Is this at all possible, or do the energy suppliers insist that the cable must come from the street?

Drinking water:
I would like to do something similar to electricity. Install a water meter parallel to the existing one and lay the line to the rear plot myself. Am I allowed to do that, or will the water supplier spoil my plans?

Wastewater:
In the pink area (built-over courtyard entrance) is also the wastewater pipe of the front house. Ideally, I could directly connect the wastewater from the rear house there. Am I allowed to do this?

Telephone:
My father-in-law (former Telekom employee) says that we could simply connect in parallel to the existing connection.

Has anyone of you already carried out a similar project and can help me here?
Thanks in advance for the support.

Regards
Tobias

Look into the [Gemeindesatzung] and talk to the local suppliers. It is regulated differently everywhere.

For example, with us, every household must have its own sewage connection, even in rear buildings.

Now the question for me is how to develop the plot in the second row as cost-effectively as possible and whether it might be sensible in this context to combine the four plots and not just the three rear plots.

From my point of view, yes, because this would mean that the piece intended for construction, as part of the "only" overall plot, would lie directly on the public road; otherwise, it would probably suffice to combine only the parcels on which the planned house will be located.

Phone: The father-in-law (former Telekom employee) thinks that we could simply connect in parallel to the existing connection.

The ambiguous wording probably quite correctly means that the main connection point of the front house can be used as well, and it will usually still have enough free twisted pairs. However, we will probably only be talking about copper here; I do not suspect any fiber optics. But this is supposed to support up to 250 MBit/s. For water and other utilities, the providers usually have a list of licensed specialist companies they trust.

Then the rear building is dependent on the front building. I wouldn't do that. If the house is rented out, do you regularly go into the tenant's house to check on the equipment? And what if it is to be sold? You never know. I would do it "right" from the start.

Then the rear building is dependent on the front building. I wouldn't do that. If the house is rented out, do you regularly go into the tenant's house to check the technology?

We would then make two rental apartments out of it and house the technology in the basement. Therefore, this should not be a problem.

And what if it is supposed to be sold? You never know. I would do it "right" from the start

I also see it as a very good argument to keep the plots separate. Combining the plots is still possible later, I imagine splitting them afterwards to be more difficult. The best solution would still be a middle ground. Then I will contact the utility providers and report back here.