The price of a storey building is primarily determined by the construction method (modular vs. traditional), material specifications, and structural complexity. For B2B buyers, it is essential to request a Bill of Quantities (BOQ) that breaks down costs into structural steel frames, wall panel systems (EPS, Rockwool, or PU), flooring, and finishing materials. Typically, prefabricated steel structure buildings offer a 20-30% cost saving over traditional concrete due to reduced labor time and waste.