NASCLA Accredited Examination for Commercial General Building Contractors

The NASCLA Accredited Examination for Commercial General Building Contractors is a national trade exam used by participating U.S. licensing jurisdictions to assess applicants’ broad commercial construction knowledge. It is commonly taken by contractors seeking a commercial general building contractor license. Passing the exam does not itself issue a license: each state or jurisdiction sets its own application, experience, and financial requirements. Because the NASCLA exam may be accepted in multiple jurisdictions, confirm with the licensing board where you plan to apply which exam edition and additional steps are required.

The exam tests knowledge across commercial construction, including interpreting plans and specifications, sitework and drainage, concrete, masonry, building systems, safety, and project requirements. It is an open-book, timed examination, so preparation involves both understanding construction concepts and locating information efficiently in the approved references. For the 2027–2028 cycle, check the current NASCLA candidate bulletin and your testing provider’s instructions for the applicable format, reference list, and content outline. Review missed questions by topic rather than relying on memorization alone.