New construction - How to build economically sensibly?

Exactly like that, then I'm almost the same. Also floor and painter done by myself.

Subtracting the garage is unfortunately not so easily possible, since we did not receive an invoice for 1 piece of garage, but items like the base slab, masonry, and clinker are included in the fixed price from the shell builder. I could at most specify the garage door, the 2 doors, the window, electrical wiring, interior plaster, and garage roof.

You can subtract between €6000 and €8000, possibly €7000 as an average value

You can calculate between 6000 and 8000€, possibly 7000 as an average

I meant for a 3x6m garage..

Of course, one should not assume this value... that's why we told our architect right away that we would like a reasonable calculation including all ancillary building costs. There was no upscaling in that sense for us. Land costs were already known, and we set fixed values for the kitchen and outdoor facilities, which we then adhered to.

However, I must say that some values here that are always called "standard" are in part far above our expenses. Some examples of our costs: Earthworks: €4,682.26 House connections (electricity, water, telecom): €3,044.65 Engineering costs (architect, structural engineer, surveyor): €16,984.50 Painting work + flooring as do-it-yourself (only material): approx. €4,500–5,000

You can calculate between €6000 and €8000, possibly €7000 as an average

No... I alone come to about €11,000 just with the items I can quantify... so without the base slab, masonry, and facing bricks.

So I would now have calculated about €18,000 for the complete garage.

EDIT: Although theoretically you shouldn't calculate the facing bricks at all, since the area of facing bricks on the garage probably would have gone to the area on the house where the garage currently stands :P

Painting work + floor coverings done by oneself (material only): approx. €4,500-5,000

Here (and with other listings + sanitary) the real differences lie buried and not in supposed huge regional differences. I alone have spent more per room for the above item without feeling like I was in the luxury segment. It is simply a different standard. And while some people wouldn’t even accept certain things in a rental apartment, for others they seem to belong in the dream house.