Additional costs for anthracite for windows, front door, and garage door?

unfortunately, we contractually agreed on the color white for the windows, the front door, and the garage door. What do you estimate the additional costs would be for switching to the color: anthracite?

This varies from builder to builder: we paid just under 1.8 thousand for a bunch of windows (i.e., the entire house). For the sectional door from Zapf, I have to guess... 600??? But that was in 2013.

Usually, you have the choice between different RAL colors. White and anthracite should actually cost the same. It probably depends on the material. With wood-aluminum, I know it that way.

As I said, I had a total of offers from 10 different construction companies, for the windows they were all between 4000 - 6000 EUR. That was too much for a bit of foil, for 1800 I would definitely have done it. That is fair.

With us:
- 10 windows 2 terrace doors additional charge just under €2000
- Garage door €600
- Garage door (entrance door) €180

Usually, you have a choice between different RAL colors. White and anthracite should actually cost the same.

If it has to be coated white, that is often the case ...

It probably depends on the material. With wood-aluminum, I know it like that.

... or also with plastic-aluminum or aluminum.

With plastic, however, white is usually the standard color of the material itself, and other colors are often produced by foiling. That, of course, costs differently because it means "without/with" an additional work step and material.

Window manufacturers charge for it rather symbolically, house providers rather generously.

With plastic, white is the normal standard since the profile is white. Everything else must be foil-wrapped and therefore costs an additional charge. That was how it was explained to us. For 14 windows and 8 patio doors, foil-wrapping costs us an additional 1,200€.