About

Hi, I'm Aldo. I'm 24, a carpenter in California, and I'm working toward my own Class B General Building Contractor license.

Built on a job site, not in an office

When I started studying, I found that most prep material was either scattered across a dozen websites or written like a legal textbook. So I built the guides I wanted: clear, organized by topic, and written in plain language by someone who works with his hands.

Our vision

GreenTagPrep exists to help young Americans, including many young Latino and Mexican-American tradesmen like me, build real wealth by becoming licensed contractors.

A lot of young guys in construction, including those in the union, are already earning good money. But many of us feel we could be running the job, not just working it. The license is the step that gets you there, and we want to make that step clearer.

This is for people like me. This is for us.

What GreenTagPrep offers

Two digital study guides: one covering Law & Business, and one covering Class B trade topics. Each includes original practice questions written for these guides. You can buy them separately or together as a bundle.

What we stand for

Accuracy first. Each guide lists its sources, and we work hard to keep the guides accurate. Laws and requirements change, so confirm current requirements directly with the CSLB before you apply or test.

Original questions only. Our practice questions are written from scratch. They are not copied from the real exam.

Honest expectations. We can't promise a pass. We can help you study in an organized way.

Respect for the work. Our guides are protected by copyright. Pirating them is illegal, and we may pursue legal action.

See the guides

GreenTagPrep is an independent study aid. It is not affiliated with, endorsed by, or sponsored by the California Contractors State License Board (CSLB). Using these guides does not guarantee that you will pass any exam.