Flat roof of 170 sqm with a basement on the slope

I have to admit, I don't understand the draft. So this is a completely normal single-family house - not a semi-detached or terraced house, correct? How wide is the plot next to you? To me it all looked like a terraced house - but now it says ED for single and semi-detached houses. What is the one in the middle supposed to build if the ones on the outside are building individual houses?

In the plan, the garage is placed in the south. The text said, garage only on designated areas. But I see the garage here in the north? Or is that something else? I can’t interpret the strips 100%.

But the main question is about the arrangement of the house. If I have the street to the east, an adjacent house to the north, and a high-rise to the west - what is more obvious than placing my terrace to the south? Placed transversely to the other row behind the house, it results in a narrow garden strip that is only moderately bright, which I simply don’t find cozy.

But as I said, it might also be that I haven’t understood everything yet.

The draft is obsolete for now. This was designed by an architect when the purchase decision for the plot was still pending. But for us, it turned out to be better to approach planning and execution with someone else. Only a few hours were invested with the architect here. The original plan was actually to continue the collaboration and credit the work. Doubts about the construction management and the spatial program/building body then made us reconsider.

The garage area is, for some plots, an additional option outside the building envelope. But not a must. So a garage/carport can also be accommodated within the building envelope itself. The future plan would be to place the carport on the north side.

Our plan, as you already wrote, would be to place the terrace on the south with an extension forward towards the southeast, making the building body deeper but less long.

What worries me now, however, is whether the budget will actually be sufficient. I was actually optimistic that it would work because the current architect (not the one who made the draft!) credibly presented the cost situation in my opinion. And of course also because he has current experience with single-family houses.

What has not been addressed at all in this thread, especially with regard to neighborhood issues: you cannot arbitrarily model terrain in the boundary area. All without guarantee, but: here in Saxony, embankments/slopes already count as structures, as do retaining walls with backfill. That means officially nothing takes place within the 3-meter setback area, the decisive factor is the location and elevation plan of the as-built survey included in the building application. Slight terrain adjustments are probably tolerated. You should definitely inquire here: what is allowed and what is not where you are. Your future neighbors or their buyers in 10 or 20 years could cause you serious problems. On the other hand, the current terrain situation seems not to be really worth preserving where you are. Building notification or building application? The latter would relieve you somewhat if the new terrain is already drawn in the application and then approved.

The architect said that since, as mentioned, we have not yet commissioned one and therefore do not yet have a cost estimate, we will manage well.

With what would an architect not yet commissioned manage well? - I'm a bit puzzled about that.

What would an architect not yet commissioned by you manage well? - I'm a bit stuck on that.

Architect number 1 from (as well as number 2) was of the opinion that feasibility with the budget of €625,000 (pure construction costs, fees, and ancillary construction costs) was given. This was based on our wishes, ideas, and the facts of the property. The author (an architect who was no longer in the running) of the draft at the beginning of this thread also considered it quite feasible to implement the design within the budget. The assessment was made based on own key figures from completed single-family house projects from 2018, taking into account cost increases and a buffer.

What I wanted to add to my post from a moment ago was that after following some topics here where concrete construction costs were listed, I became concerned whether we can really stay within budget. The projects were also roughly in the same size range.

I think our project is very comparable. Therefore, I would say it could work, but it won’t be easy. However, I would only start once I have quotes for each trade. Otherwise, given the market situation, it’s impossible to estimate costs. What does Baunebenkosten mean to you? That is probably the crucial little bit.