Gewährleistung is the statutory liability of a builder or seller for defects; for a building, the claims generally become time-barred after five years. Investors lose it in two ways: they buy a store without acquiring the claims, or they let the period run out while exchanging letters.
• The acceptance date of each building, and the expiry date that follows from it.
• An assignment of the seller's defect claims in the purchase contract, and the scope of any liability exclusion.
• A technical inspection about six months before expiry (Part 7).
• For open defects, steps that legally suspend or restart the period — not letters alone.
• The warranty guarantee: amount, issuer and term.