Demolition of house with basement, new construction without basement

The property already belongs to me, not to the landlord.

Bad luck. I wish you even more luck!

Bad luck. I wish you even more luck!

Why bad luck? I inherited the property....

Why did it turn out badly? I inherited the property....

Oh, I thought your landlord was the initiative in the game. So you are the owner and your possible contractor is now coincidentally your landlord instead of your landlord wanting to become your contractor. Okay, if it can be one way, it can also be the other way around ;-) Since the property is already in your ownership, a developer solution is logically ruled out. But hiring him as the general contractor and combining demolition and new construction into a single package is possible. However, prudently calculate that significantly less than the expected demolition volume will be reusable, or that when compacted it will result in less volume than desired. Send the house plans to basement specialists and verify how accurate the assessments of the additional costs are. I do not initially see the property warranting an above-average price – unless the relatively large planned basement is due to rocky ground or groundwater conditions.

Please check if the property is located in a water protection area. Then RCL (no matter which) is critical.

Send the house plans to basement specialists and verify how accurate the assessments of the additional cost are. I don't see the plot initially justifying an above-average price - unless the relatively high basement estimate is due to rocky ground or groundwater issues.

The matter is causing me increasing headaches. I have the house designs here, but not for the basement. There is no design for it because we basically said we would build without a basement. The house we want to build, we have already seen it; it stands a few streets away, also without a basement. The builder gave me 100k as a rough guideline for a waterproofed basement shell ("white tank"). He does not do a black tank. Maybe the basement contract should simply be outsourced to a specialist basement builder, and then the builder continues building from the upper edge upward? Originally, I actually wanted to have everything from one source. And one more thing. Yesterday my father gave me an idea. The plot lies about 0.5 m lower than the street. You could build a normal basement as a black tank at the same depth as the current basement. So that it sticks out quite a bit, and then fill up the plot to match the street level. So that in the end you actually get a completely normal basement with a completely normal depth...

I have the drafts for the house here, but not for the basement. There is no draft for it since we actually told him we were building without a basement. [...] maybe the contract for the basement should simply be outsourced to a basement builder, and then the main contractor continues building from the top edge?

That's exactly what I thought. The basement builder only needs the ground floor so that he knows where the load-bearing walls run above it. See the basement in this sense as a slab with technical and storage rooms.

Originally, I actually wanted to have everything from one source.

The main contractor can subcontract the basement builder and manage construction supervision for both, you just arrange the tender process.

And one more thing. Yesterday my father gave me an idea. The plot is about 0.5 m lower than the street. You could build a normal basement as a "black tank" at the same depth as the current basement. So that it sticks out quite far, and then fill up the plot to match the street level.

In principle not bad, especially since without a basement you probably wouldn't want the house to be below street level anyway - among other things because of the keyword lifting station. How was it thought of previously?