What do you think, the major costing part of building project Structural cost or finishing cost?

it is always Finishing cost

As mentioned by Mr Rehan Qureshi in his answer it is yes finishing cost more than structural costs. and answer to the question about how much finishing cost is more than structural cost depends on the luxury used in buidlng.

Structural cost is mentioned as (S) and Finishing as (F) Main cost points are:

• Basement Excavation and foundations (S)
• Vertical Structure (S)
• Floor and Roof Structures (S)
• Exterior cladding (S) (F)
• Roofing and waterproofing (F)
• Interior partitions (S) (F)
• interiof finishes: Floor walls, ceilings (F)
• Function Equipment and specilties (F)
• Vertical transportation (elevators) (F)
• Plumbing (S) (F)
• Heating, Ventilation and Air conditioning (F)
• Electrical and Communications (F)
• Fire protection (F)
• Site preparation and Demolition (S)
• Site Development (S)
• Site utilities (S)