Total cost of a single-family house in Bavaria

For one thing. The architect will not only create his cost forecast with formulas but also substantiate it with prices he has recently achieved in tenders, making the forecast meaningful. On another topic, I wrote that exactly two weeks ago we had a tender for a project, and the bids were almost 100% in line with the architect’s forecast. Total sum slightly below his forecast.
Regarding the general contractor. Is the plot suitable for a house of standard? For example, a coffee grinder house so popular in the south? Then yes. Then you save money there. Because many planning services are omitted. You can then fall back on dozens of built floor plans, one or two adjustments, done. Whoever can build like that will certainly come out better. If not, steep slope, unusual shape of the land, etc., then architect.
Being economical starts with the plan. Garage, yes ok, but please integrate precast concrete garage. Basement, is that necessary? Can I possibly create cheaper storage spaces under the roof? Utility room and bathrooms close together? Saves circulation piping. Utility room near the shafts, saves connection costs. Window dimensions, does everything fit into a 110 mm masonry opening? Then I get windows in good quality cheaply. Interior doors, can I do without sliding door variants? House electrics, does it have to be smart home? Do I really need roller shutters? Kitchen, can the typical angled unit from the discount store brochure fit in? Oven, is that necessary? These are many many individual building blocks that add up to tens of thousands in costs or savings and make the difference between cheap and expensive. Without making the economical too cheap. Karsten

Firstly. The architect will not only create his cost estimate using formulas but will also substantiate it with prices recently achieved by him in tenders, thus making the estimate meaningful.

Here our opinions and experience differ. The OP will gain his own experience when he builds with an architect.

Without a basement and taking into account various tips from Nordlys, it could work. My God, what land prices do you have... that's really hefty!

We also build in Bavaria..

Especially in Munich, it can actually be more expensive than here in the countryside.
I consider anything under 2000€/sqm as not feasible.
Not even with a lot of personal effort.
I can only agree with the previous posters.
Really plan a lot of buffer. You will need it!!

And personal effort doesn't really save the amounts that one usually imagines beforehand.

Where are you building in Bavaria?

First of all, thank you for your answers.

We have an additional budget for the kitchen and furnishings.
We will probably carry out the exterior work and painting ourselves. This way we can save a few thousand euros.
In your opinion, is 370K then feasible or not?
Thanks

Painting work as DIY? Do you really trust yourself to do that, for example, in the stairwell?
We had the painter do the kitchen, living room, and hallway, which means we did half of our 800 m2 area ourselves. Saved 5000 euros but used up two full weeks of vacation...
Otherwise, I also think: House of this size with basement about 300,000€, upgrades: 20,000€, open ended upwards; earthworks: 20,000 to 30,000, soil survey, soil analysis, utility connections 10,000, painting work: 15,000, floor coverings 15,000, garden: minimum 20,000, prefabricated concrete garage: 7000, kitchen: 15,000
Total: at least 420,000
I would go to a general contractor, otherwise you can add an architect fee of 30,000...