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A C-21 Building Moving/Demolition license (16 CCR §832.21) authorizes raising, lowering, cribbing, underpinning, demolishing, and moving or removing structures, including their foundations. CSLB’s own C-21 study guide weights the trade exam across five content areas: Planning and Estimating (25%), Project Preparation (20%), Building Moving (13%), Structure Demolition (21%), and Safety (21%) — and while Project Preparation includes removing hazardous materials as a planning step, actually performing asbestos abatement requires the separate C-22 license. This course covers the CSLB-outline C-21 trade exam plus Law & Business: a full study guide, 4 practice exams, and an explanation for every answer. Read the full C-21 License Guide for the complete content breakdown.