With us, it costs 1800 including the reports.
You can get a building surveyor through the Bauherren-Schutzbund for 1500 (7 inspections)
Did you each only assume the lowest price that is accepted in the contract?
With us as follows:
the construction-accompanying quality control with certificate: 4,800-9,800 euros
selective inspections: 3,500-8,900 euros
These amounts under 2,000 euros confuse me a lot. Alone the reviewing of the development plans, the geotechnical report, and the contract with subsequent discussion took about 5 hours with us (minus the first hour). So that is already 340 euros just for that part, and no travel costs were incurred here.