Price increase - Our construction company wants 21.4% more

I am honestly shocked now. Our construction company has just informed me that they want 21.4% more money due to the price increases in the construction industry. At the moment, I am still stunned and cannot think clearly.

A look into your contract should provide clarity here.

Wow, that is a word. You had already signed, right? I'm with Halmi and keeping my fingers crossed for you!

Ufff… this is really a lot… amazing. I would be interested to know if that just works like that. Since we assigned everything individually, I don't even know how it works with a general contractor.

What does the contract say?
Price guarantee for how long?
If exceeded, for how long already?

Caution amateur knowledge: In my mind: Beyond a certain limit, he must disclose his calculation from before and after. The best thing would be to get professional help. It doesn't have to be a lawyer right away, maybe the consumer protection center is enough at first. Good luck!