Difference between standard and medium versions

The higher the value of the equipment, the higher the depreciation....I would take that into account here at once

Are we still talking about the car?

I wouldn't sign that for the house.

Yeah, that rather applies to cars... and not to houses

The loss in value of the house does not matter to me, however, since after 30 years in the house with high-quality fittings I may have lived "better." Besides, I am building it for myself and not for a future sale.

Many things have already been mentioned: Tiles range from €10 (borderline) to €25 (reasonable) up to €60 (high-end) -> open-ended upwards (luxury) Kitchens range from €2K (borderline) to €10K (reasonable) up to €20K (high-end) -> open-ended upwards (luxury) Sanitary objects (washbasins) range from €30 (borderline) to €150 (reasonable) up to €1000 (high-end) -> open-ended upwards (luxury) Plaster ranges from gypsum to clay Clinker ranges from €0.50 to €1.50 Roller shutters range from "none" to "electric with radio control and lullaby" Windows range from "white plastic" to "aluminum lift-and-slide door with bulletproof glass" Lamps range from ceiling outlets to recessed spots... Doors made of plastic or wood, solid core or slats Number of sockets, circuits, etc. etc. And so on... In the end, everything is somewhat subjective – fashion and quality don’t always go hand in hand.

Hello,

Whereas the rough calculations with 1400-1900 euros are always calculated per square meter of living space, or am I mistaken?

A house consists of the footprint; so you are mistaken.

Regards from the Rhineland