Surcharge for facade paint from white to color?

Yes, of course. Color selectable can also mean hot red or yellow. Selectable from what? And no other choice. But it is a theoretical discussion. There are no problems with you, and then everything is fine.

Funny enough. We didn't pay a single cent more for a pretty strong yellow at the discount store Town & Country. Colored topcoat from Knauf...

But well, that's water under the bridge. The general contractor wants 4,000, there's hardly any room for negotiation. Either you pay the 4,000 bucks or you get it white and paint it yourself.

Which won’t cost you much less than 4,000 EUR with decent paint and your own scaffolding, plus a lot of work. Because the contractor takes back the scaffolding the day the plasterers are finished.

By the way, colored stuff actually costs (significantly) more. Mainly because it doesn't come off the production line but is mixed per order. Custom is always more expensive than mass.

Even inexpensive construction companies can be worth their price. And it shows once again that cheaper providers can be reasonable if they are the right subcontractor.

We didn’t pay a cent more for a fairly strong yellow at the discount retailer Town & Country. Pigmented top plaster from Knauf...

This sounds like the corporate design of the general contractor in this case.

I'm almost tempted to test the limits of our "color selectable" by saying "we would like the facade in midnight black." But I can't do that, in the end he'll actually do it and then I'll be stuck with my mascara house.

That sounds like the corporate design of the GU in this case.

Because of yellow? According to the construction service description, HBW > 20 was included. It may be a mixed calculation because many do not choose pastel blue, green, or pink, but rather yellow... but contractually, I would have gotten any color in this range for free.

But I am also repeatedly surprised at what the discount store includes, for which you would spend a lot of money at the legendary architect's house...

;)