I would make that dependent on how solvent the company is (see [Bundesanzeiger]). Otherwise, the payment plan is not unusual in the industry. We are also building a prefabricated house and for us it looks as follows:
- 5% after submission of the complete building application documents
- 5% after completion of the foundation slab
- 75% after construction; at this point, windows, roller shutters, and front door are installed, the roof is covered, and plumbing and electrical preparations are completed.
- 15% after acceptance and handover
Since the company we commissioned has a very good reputation and builds up high reserves, I sleep well.