Floor plan design (semi-detached house of 240 sqm) - experiences?

Typical models are called, for example, 141 SD35, which means offering 141 sqm of living space under a 35° gable roof including the attic studio = parents' bedroom for families with three children; since you are supposed to build an SD 20°, models with PD are not suitable for a "1:1 takeover"; and the smaller models just under 130 sqm are usually not transferable to you either. Otherwise, I would also like to recommend my post "A semi-detached house has TWO halves" (where you can also find my "A house construction roadmap also for you: the HOAI phase model").

This means for you concretely: you can take the usual DH project house types as a source of inspiration up to the top edge of the upper floor; the total living area will decrease slightly; under the flatter gable roof there may only be an attic as storage space; with a 7m house width it will be more relaxed for you. But now really ...

P.S.: Definitely FORGET about trying to reduce a pattern that is too large - that can never ever never not work, especially not for this category of objects, since these houses are planned without even the smallest seam allowance. Because of the SD 20° DN, you can only adopt parts from the inspirations "DH of the usual suspects" (see forum search with the keyword "usual suspects" Brale / Hildmann Traumhaus / Tecklenburg / Weisenburger / Wengerter / Werner). Typical models are called e.g. 141 SD35, which means providing 141 sqm of living space with the attic studio = parents' bedroom included under a 35° gable roof for families with three children; since you are supposed to build an SD 20°, the models with PD are also not suitable for "1:1 adoption"; and the smaller models just under 130 sqm are usually also not transferable to you. Otherwise, I gladly recommend my contribution "A semi-detached house has TWO halves" (where you can also find my "A house building schedule also for you: the phase model of the HOAI").

I am not familiar with the term GU. Is a general contractor someone who handles both planning and execution?

So are these construction companies like Büdenbender mentioned earlier in the thread, or am I totally off track?