Plot on a slope in the Munich outskirts - how to decide?

The issue with building on a slope is that you should build WITH the slope, especially if you want to optimize costs. Therefore, it is better to build the ground floor into the slope rather than a full basement. The steeper the slope, the more I would recommend going to an experienced local slope architect rather than a prefab builder, who (in my opinion) relies more on standard solutions.

What does the TE understand by slope? I am also a fan of a slope house.

Maybe this helps you a little for orientation:

We are building in the Munich surrounding area (about 30 km) and our house is being built on a slope, with a basement that is partly used for living (that part is at ground level) and partly for technical rooms and storage (completely underground). Our house (house + basement + excavation + drainage + budget for KNX + > 10 kWp photovoltaic) will come out pretty much at the price you mentioned. However, we did not choose the cheapest provider but rather drifted a bit into the eco-friendly lane and are building a passive house. Also, the soil and water situation is not ideal here. The drainage work alone will probably cost around €18,000. A residential basement is always more expensive than a purely utilitarian basement; we also have a fully equipped bathroom there. The house consists of a basement, ground floor, and upper floor.

Our house will be quite large because we want two fully usable workrooms.

With a smaller house, better soil, a better "water drainage-groundwater situation," and one floor less, you can also build cheaper in the Munich surrounding area. It also becomes cheaper if you do not mind using styrofoam or glass/mineral wool in your walls.

Our slope is not very steep (about 2 meters over 19 meters, but the height of the raw floor must be at the highest point). I cannot judge how it is with steeper slopes. We really like our plot anyway - but we "couldn't" choose it; rather, we were lucky that it came from the family.

Check if there is a development plan for "your" plot. If yes, the regulations are also important for building on a slope, e.g., if the municipality determines the height of the raw floor.

Does it really have to be an architect's house? They usually seem more expensive to me than a "ready-made house",

This is a popular but still a misconception. In the post "why is the architect so expensive?" I explained it - not here, I will email you where -.

A hillside house could consist of a prefabricated cellar, on which the actual prefabricated house is then placed?

The "prefabricated" house manufacturers are mostly wood frame panel builders and do not also build cellars with the same walls. So the cellars usually come from a supplier. There you can also order cellars with living spaces, but I have not yet encountered a homogeneously designed house model in this regard (but I only started reading prefab house magazines in 1982/83). So I would not expect more here than a flat plot house with a mother-in-law apartment pushed in underneath in the hobby cellar - exceptions please report to the nearest 11anten office or to our studios in Munich, Vienna or Zurich :)

Pinkiponk, do you have a "ready-made house" for a slope? I don't know any. And I think for good reason: because the slope is variable, how is a ready-made house supposed to work there?

What does the OP understand by slope? I am also a fan of a slope house.

Unfortunately, there is nothing about this in the development plan. How should I describe it then? If I stand on the street/property boundary (top edge) and then want to go to the opposite property boundary (bottom edge), it really goes down very steeply (subjectively). A few properties further, houses are also built on the slope, and it seems to me that they build very deeply into the slope there. Does that help?