Offer comparison and liquidity planning for new construction, any experiences?

Hm thanks, I will take a look at that. Honestly, with a 10-degree shed roof and a ridge height of 6.9m, I find that hard to imagine. Storage is only a small part, and here it’s about a few square meters. It’s more the general luxury that we don’t just want 10 sqm children’s room and 30 sqm kitchen+dining+living room. Before that, we would rather buy an existing property.

Our two children’s rooms are each 11.5 sqm (after deducting the sloping roof, before deduction 15 sqm), kitchen/living/dining just under 50 sqm. Plus an office/guest/playroom of just under 14 sqm. And we also have a second children’s bathroom of just under 5 sqm.
Where do the specifications for ridge height and inclination come from? I couldn’t quite figure that out.
Regards from the Swabian Alb

10° roof pitch with green roofing and how exactly is the mounting fixed without damaging the sealing?

If the roof pitch faces south, I would raise as little as possible and work only with weighted plates. The risk that the flat roof will become leaky after 10-15 years is too great for me. And having enough space between the modules as walkways does result in less yield, but accessibility is significantly better. Omit the storage if possible. It’s never worth it.

Other customers had canceled their purchase contracts at the last minute. "People hesitate to buy a new house and want to hold on to their money until they know what VW decides," she says.

Before the reunification, VW was a border zone area and the houses were dirt cheap and still cheaper than all of southern Germany. Tübingen is simply the Stuttgart catchment area, and even if Daimler and Bosch both shut down, the houses there will hardly become cheaper.

VW was in the pre-unification period an outer zone area and the houses were dirt cheap and even now still cheaper than all of southern Germany. Tübingen is simply within the Stuttgart catchment area and even if Daimler and Bosch were to shut down together, the houses there would hardly become cheaper

Tübingen is already nice but independent of the Stuttgart catchment area it has also, for years, in a certain way become somewhat "greenwashed," as in some other cities as well. Many of the actual or originally truly "greens" can no longer afford it today. In this respect, you simply have to pay this surcharge. The idea mentioned by the OP of moving to the Stuttgart area does not make it any cheaper, in my opinion with significantly less quality of life there.

Before that we'd rather buy existing property.

That should be a good idea, then at least you don't have to deal with the complained-about building regulations that gradually reduce your original plan.

Our two children's rooms each have 11.5 sqm (after deducting the sloping roof, before deduction 15 sqm), kitchen/living/dining just under 50 sqm. In addition, an office/guest/playroom with just under 14 sqm. And we also have a second children's bathroom with just under 5 sqm. Where do the specifications for the ridge height and the pitch come from, I couldn't quite make that out. Greetings from the Swabian Alb

The ridge height and pitch are also from the development plan. Your room sizes sound good and that would be okay for us too. Further ahead you can see our planned floor plans. They are not fixed yet and reducing the floor area is just as much an option as the other options.

Just for your information because I keep reading Tübingen: The new development area is located in the district of Tübingen, not in the city of Tübingen - we could never afford anything there.