For 2013, the National Association of Home Builders broke down the cost of construction on new single-family homes into the following eight major stages of construction:
Interior finishes account for 29.3% of construction costs
Framing: 19.1%
Exterior finishes: 14.4%
Major system rough-ins: 13.4%
Foundations: 9.5%
Site work: 6.8%
Final steps: 6.6%
Other costs: 0.9%
