ᐅ How much additional cost is expected based on the structural engineer’s calculations?

Created on: 11 Jun 2023 11:17
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Lauralila88
Hello,

I have to admit that we approached the house construction quite naively...

We have already signed the detailed construction plans, and now the construction company wants us to waive our right to special termination in writing – is that even legal?

Now to the main question: we signed a fixed price contract (turnkey), but the site manager said that the price might change again after the structural engineer's calculations???? I mean, we won’t make any more changes to the plans, and we have already budgeted with the bank based on the known price – is this normal? It feels like buying a pig in a poke!

Best regards
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Lauralila88
19 Jun 2023 20:49
Zaba123 schrieb:

I meant wanting extra money for a black tank waterproofing if you already have a black tank in the original offer, according to your statement. I have a watertight :-D waterproof basement made of cast-in-place concrete myself.

A bitumen coating is not the same as black tank waterproofing.
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Lauralila88
19 Jun 2023 20:50
Lauralila88 schrieb:

A bitumen coating is not the same as a black tank waterproofing system.

The house price included a bitumen coating with drainage.
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Lauralila88
19 Jun 2023 20:51
xMisterDx schrieb:

That doesn’t help you at all, honestly... you don’t have enough financial reserves for this project, period, end of story.

How much financial reserve should we have for this project?
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WilderSueden
19 Jun 2023 21:19
Lauralila88 schrieb:

How much financial reserve should we have for this project?

I would say off the top of my head, for 150 sqm (1,615 sq ft) with a full basement and a waterproof concrete shell in an earthquake zone (on the Swabian Alb or in the west?), a ready-to-move-in price of around 550,000 would be realistic. This is excluding the land, landscaping, and kitchen. Depending on the exact specifications, it could be slightly more or less. You certainly won’t be able to build it for 450,000.
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Lauralila88
19 Jun 2023 21:23
WilderSueden schrieb:

I would say off the top of my head, for 150 sqm (1,615 sq ft) with a full basement and waterproof concrete shell in a seismic zone (on the Alb or in the west?), 550,000 fully finished is certainly realistic. Without land, landscaping, or kitchen. Depending on the exact specifications, a bit more or less. You definitely won’t get it built for 450,000.

In the west.
WilderSueden schrieb:

I would say off the top of my head, for 150 sqm (1,615 sq ft) with a full basement and waterproof concrete shell in a seismic zone (on the Alb or in the west?), 550,000 fully finished is certainly realistic. Without land, landscaping, or kitchen. Depending on the exact specifications, a bit more or less. You definitely won’t get it built for 450,000.

We are in the west. Okay, 550,000 and that does not include additional construction costs like soil removal?
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Zaba123
19 Jun 2023 21:42
Lauralila88 schrieb:

A bitumen coating is not the same as a black tank.

But that is exactly the waterproofing of a so-called "black tank."

Good luck