Contractor School Online®
National Contractors License BureauThe premiere contractor school to assist you in passing your State Contractor License Exam.
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What We Offer
Obtaining a Trade License
Test Preparation

Construction Glossaries and Definitions

About Us

Contractor School Online has over 20 years of experience.

Contractor School Online® (CSO) is the premier educational provider, offering all 50 states quality training to prepare you for your State Contractor License Exams.

We're a National Company and carry Construction Books, Codes, ADA, National Codes, CD's, DVD's, Audio Tapes, Construction Calculators, and more.

We have helped corporations both large and small, as well as individuals, to obtain their contractors or specialty license in the states that require a state license.

CSO can assist you with practice exams, applications and home study courses in all states that require a state contractor's license.

The materials we carry are what that state suggests you read, before taking the state tests.


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