Why don't construction prices go down?

Local general contractor in eastern Rhineland-Palatinate with his own construction crew. 200 m2 house including floors worth 35 €/m2, gable roof, Q2 walls and ceilings, "normal" bathrooms with walk-in showers (they are really good standard, I don’t even have to check), Schüco windows (color outside and inside), Braas Turmalin roof tiles, 269 cm ceiling height, steel stringer staircase and small air space along the stairs, open roof structure, 3 roof windows, Daikin air-to-water heat pump including earthworks for just under 2400 € per square meter. I excluded electrical work, I’m doing that myself. That’s somewhat distant from the "doesn't go under 3000 € per square meter" mantra here in the forum.

Morning, do you calculate the net living area or how is it with usable area? Does that include basement, utility room etc.? And without additional costs?

I have now divided the offer price by the gross floor area. However, we do not have a basement, but the knee wall on the upper floor on the south side is set very far back and we use that as an attic. Otherwise, there are no sloped ceilings that would need to be considered in the living space calculation. Additional costs are already included except for the soil survey, house connections (although these are already on the property because of the existing building), excluding construction electricity consumption (which is entirely our responsibility, the electrical box comes included from the general contractor), and of course excluding exterior facilities. The property is flat and without encumbrances.

I have now divided the offer price by the gross floor area. However, we have no cellar, but the knee wall on the south side in the upper floor is built very high and we use it as an attic. Otherwise, no slanted ceilings that would have to be considered in the living area calculation... Additional costs are already included except for soil survey, house connections (although these are already on the property because it is an existing building), without construction power consumption (which is entirely on us, the electricity box is included from the general contractor) and of course without exterior facilities. The plot is flat and free of encumbrances.