Is financing feasible this way?

Ok, I somehow assumed a relatively even slope. If it has already been done all around like that, then of course that is a viable way. It might still be sensible to calculate what you save on earthworks with a basement. Possibly, in total it isn't that much more and you’ve gained living and storage space. 240k for 150m² still seems too cheap to me; more than just floors, painting, and doors are missing.

240k for 150m² still seems too cheap to me, there is more missing than just floors, painting, and doors.

Spackling work will be added...
We already have offers from several companies, some quite advanced in planning. However, we always ended up around 240k +- 5k. For example, we hardly planned any extras. Only a walk-in shower, a stair underbuild, and electric blinds on the ground floor. Otherwise, we stayed completely standard (apart from the interior layout).

Ok, I somehow assumed a relatively even slope. If that has already been done all around, that is of course a viable way. Possibly it would still be sensible to calculate what you save in earthworks with a basement. Maybe in total it’s not that much more and you gain living and storage space. 240k for 150m² still seems too cheap to me, more than just floors, painting and doors are missing.

A very wise suggestion that our architect also made to us. It was said to be €35k just for excavation work for 150sqm of living space or €60k for a basement with 140sqm. The choice fell on the basement given the slope. House connections are too little. Even without gas, at the shortest distance it’s at least €7k.

What I also noticed is that the notary is missing. Land registry entry is a separate item and notary is a separate item. It will be around 2k€ in total for you. Construction electricity/construction water is missing. Also connection for construction electricity is missing. I have calculated 2.5k€ for both. What about the construction site setup, is that included in the general contractor contract?

What about the soil survey and soil analysis? Those are another 1.5-2k€.

Have you already paid all development contributions with the land purchase? With us, there is an additional charge after completion.

It might be tight. But it won’t break your neck now. I suspect 20-30k€ is missing. Also, it is understandable but somehow strange that you include the home ownership grant as a buffer.

We get both, which totals 40k€, but it is not calculated anywhere.

What I also noticed is that the notary is missing. Land register entry is a separate item and notary is a separate item. In total, it will be about 2k€ for you. Construction power/construction water is missing. Also connection for construction power is missing. I have calculated 2.5k€ for both. What about the construction site setup, is that included in the general contractor contract?

What about the soil report and soil analysis? That’s another 1.5-2k€.

Have you already paid all development contributions along with the land purchase? For us, there was an additional charge after completion.

It might be tight. But it won’t break your neck now. I guess 20-30k€ are missing. Also, including the homeownership allowance as a buffer is understandable but somehow strange.

We are getting both, totaling 40k€, but it is not factored in anywhere.

I overlooked the notary, that’s right. We would then have to pay 1600€ instead of 1000€. Thanks for the info.
The setup of the construction site is included in the earthworks company’s price. For construction water/power and connection costs, I used the costs of our neighbors and assumed a 10% surcharge; that should be integrated in the 12,500€.
The soil analysis/soil report is included in the offer price at Hanse Haus.
The development contributions were already paid by the previous owner, as they had to abort their building project at short notice, so we got lucky here.

Just my personal opinion: I stick to my opinion that you will be missing at least €20k and that is still optimistic. I find it strange to calculate down to €100 and not even round up. We have rounded up and included positions in the offers/construction cost breakdown for the bank that will not be realized. This works very well for us because the money is already gone and the cash buffer of €20k is already half spent even though it only starts on Monday. What I want to say is, so many unforeseen things happen during construction that the buffer will melt faster than you would like. My guess is that you will postpone everything except for the L-bricks and the backyard landscaping. And don’t focus so much on the neighbor; he won’t tell you everything either. Unless you have his bank statements. :)

Construction electricity/construction water and connections with €12.5k are fine.