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NASCLA Commercial General Building Contractor exam topics — the 12 content areas by weight
The NASCLA Commercial General Building Contractor exam is built from 12 weighted content areas. Focus your time where the weight is. Each area below links to a free study chapter and practice questions. Weights reflect the official content outline.
Procurement & Contracting Requirements
31%General Requirements
25%Site Construction
15%Concrete
6%Metals
6%Mechanical & Plumbing
6%Wood, Plastics & Composites
5%Thermal & Moisture Protection
5%Finishes
5%Masonry
4%Openings (Doors, Windows & Glazing)
4%Electrical
3%Ready to test yourself?
Drill 24+ free NASCLA Commercial General Building Contractor practice questions across every content area, then sit a full timed mock exam — no signup required.
Content-area weights reflect the official NASCLA Commercial General Building Contractor content outline. Confirm current details with National Association of State Contractors Licensing Agencies (administered by PSI). Study aid, not a substitute for the official material. Last updated: August 2026.