A building developer is a company that builds an apartment house or detached house on its own property. Prospective buyers can already buy such properties directly from the Property Developer in the planning phase. Purchasing this way can avoid high Real Estate broker commissions. The German law protects you as a buyer of such a project with the so-called broker and developer regulation. This means that you only pay for the construction work that a property developer has completed and not for the entire construction in advance.