For the submitted offer, he wants €270,000 including VAT. There are some items included that have an extra charge, such as the photovoltaic system, floor-to-ceiling shower, KfW55 construction, etc. I want these services included in the stated price.
The offer letter reminds me of ours. A standard house is being promoted, with some items being additional and subject to extra charges – which the client decides. This is how one builds with a general contractor.
The prices are fair and acceptable. As I see, there is even a double carport included. If you want the bathroom walls to be floor-to-ceiling, then you will probably have to pay an appropriate surcharge as well. And so on.
And if you don’t consider the offer fair, then go to another one. The general contractor will have full order books, whether with you or someone else. Sorry... the plot is tied up... so keep looking. You are probably in the wrong negotiation level with your demands.
Who left their signature there? You? There are already some funny comments there ;) As if the general contractor can do something about expansion joints cracking because the screed settles. The alternative would be for you to let the house dry for a year. Or the air exchange rate: it depends and is linked to the energy saving ordinance or KfW55 house.
The KfW55, the photovoltaic system, and E.P. have not been included yet.
Anyway: either accept the prices or keep looking. If they concede you 3-4 thousand, that’s good. It only gets interesting when the soil survey is available. According to the offer, that is up to you; the general contractor can always excuse himself without a survey. It’s written in black and white.
By the way, mistrust is a very bad negotiating partner!