Area 34 - Green meadow, uncertainty regarding the eaves height or knee wall height

Some pictures show the slope of the property. A house with a flat roof and 2 floors (presumably a slight staggered floor) shows that not even a gable roof can necessarily be required. There are certainly possibilities. I can confirm that the building authority likes to see the entire building.

What is your dream house? You already have a proposal from the contractor.

The dream house is a 10x12m house with a gable roof (since south orientation is okay for photovoltaics). The dream would be with a developed attic, but the height will probably thwart that plan. Additionally, we would like a knee wall of 140+ cm (or at least 120 cm), and the floor plan for the first floor really depends on that issue. The construction company initially planned with 80 cm (actually only 60 cm if the room height downstairs is 270 cm), since those seem unproblematic. But here I would be willing to fight for every centimeter.

What can really be built depends greatly on the exact plot number of your property. If your property is located at the marked position on your map excerpt, I would agree with the city and see only a single-story building there. In NRW, the 2/3 rule applies for full floors, a clever architect with connections to the building authority can possibly push through a staggered floor in a flat-roofed building. On the slope, there is also the possibility to plan a basement with one-sided garden access.

NRW has had the 3/4 rule in the NRW State Building Code since 2019

With large dormers or additional gables as well as bay windows, a lot can be gained in the attic. 3/4 should be easily accessible.

Is there a slope on the property?

Approximately 170m2 living space are, in my opinion, easily achievable.

Here is the house with 4.5m ceiling height and 8m height, which I consider possible.

Since 2019, NRW has the 3/4 rule in the NRW State Building Code

That is exactly my preferred level of humor dryness: the State Building Code from the time the development plan became legally binding applies. In the §34 area, this reference date practically does not exist. In this respect, the argument with a relaxation of these framework conditions is a very special insider joke for construction lawyers.

With large dormers or additional gables as well as bay windows, you can get a lot out of the attic. 3/4 should be easily achievable.

Is there a slope on the property?

About 170m2 living space are, in my opinion, easily feasible.

No significant slope, about 1.3m lengthwise (over 35m), similarly crosswise (over 16.5m). We’ll have to see whether dormers make sense or are even necessary depending on the knee wall...