For the "calculation of construction area", the construction project bill of quantities pricing specification GB 50500-2013, implementation date: July 1, 2013, as a strong article stipulates that: 8.1.1 The amount of work must be calculated in accordance with the relevant works of the current national measurement specifications for the calculation of the amount of work rules;

Property management department based on the current "Property Measurement Code" GB/T17986-2000, design and construction based on the current "Building Engineering Floor Area Calculation Specification" GB/T 50353-2005, since July 1, 2005;

And the Ministry of Construction approved the implementation of the "Construction Engineering Floor Area Calculation Specification" and the "Residential Design Code" and "Property Survey Code" of the relevant content to do coordination. This specification repeatedly consulted the relevant local and departmental experts and engineers and technicians, has held a number of seminars, and finalized after expert review. Therefore, the current "property surveying code" and "building construction area calculation code" is not contradictory, should be followed everywhere.