11ant
2021-12-18 00:20:49
- #1
The builder makes more profit if you pay more for the same effort or if he has less effort for the same price. You will pay more if you get more living space (according to DIN or the Wohnflächenverordnung — depending on how the builder measures and bills this "extra") — so you will pay more for more square meters, no matter how they come about. What is called "knee wall height increase" in the additional price list is basically "calculated additional area due to knee wall height increase." A "knee wall height increase" in the sense of "more rows of bricks under the roof slope, but with the same type of roof truss construction" increases the effort and the price. If you build a town villa, i.e., make the attic a full floor by a "knee wall 260" or "knee wall 100%," naturally more rows of bricks are built and more (also calculated) living area square meters are created. However, above the just-built walls there is no elaborate rafter roof truss, but a considerably simpler "lid" as a tied roof, which is cheaper to build. In a cross-comparison between country house vs. town villa, you regularly get the "town villa" cheaper at the same nominal size. In a comparison within the respective category of "more height 'on top'" vs. "more area 'on top'," you will get "more height" more cheaply because you can get it "on top" "individually," whereas more area is also built and billed "below" at the same time. All variants have in common that with "free planning" the nominal square meters are the calculation basis because they are the easiest billing measure for the contractor to handle and communicate. With the "replanning of a catalog design" it is different: here, more width is more expensive than more length, and a knee wall height increase with a roof pitch change is always more expensive than without changing the pitch (even if the attic space does not become "larger"). Simply put, every change is more expensive the more dimensions it affects. The worst case is "length and width and pitch." For the staircase, the construction, formwork, and crane handling are relevant price factors. Here, too, the first and second laws of gastronomy always apply :)But as the client of a gable roof house, I pay more if I build, for example, 20 sqm more floor area (top and bottom) than if I significantly raise my knee wall, right?