What are the main components of construction cost?

Construction cost components: Direct costs - labor (wages, benefits), materials (delivered to site), equipment (owned or rented), and subcontractor work. Indirect costs - site overhead (supervision, temporary facilities, utilities, insurance), home office overhead (management, accounting, marketing). Profit - contractor's compensation for risk and effort. Contingency - allowance for unknowns. Total bid = direct costs + indirect costs + profit + contingency. Cost estimation accuracy improves as design develops.