AIA construction codes refer to the cost code systems used alongside AIA contract documents like the G702 and G703 forms. The AIA itself does not publish a specific set of cost codes. Instead, contractors choose from standard systems like CSI MasterFormat, NAHB cost codes, or a custom coding structure.
Frequently asked questions
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CSI MasterFormat is a detailed system with 50 divisions covering commercial and institutional construction. NAHB cost codes are simpler and designed for residential builders. Both are widely recognised, so pick the one that matches your project type and what your partners already use.
Use CSI MasterFormat for commercial projects or NAHB for residential work. If your clients or architects already use a specific system, match theirs to avoid confusion. Consistency across partners matters more than which system you pick.
The G702 is the Application and Certificate for Payment – the main form contractors submit to request payment. The G703 is the Continuation Sheet that provides a line-by-line breakdown of work completed and materials stored. They are typically used together with the G701 Change Order form.
Yes, but check with your partners first. Custom codes work if everyone on the project agrees to use them. Standard systems like CSI or NAHB are safer because architects, owners, and subcontractors already know how to read them.
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