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As the largest contractors license school in California devoted strictly to construction professionals, CSLS has earned a reputation for service and quality instruction that is unmatched anywhere. For more than 25 years, we have helped more than 125,000 contractors and other professionals to become licensed, learn about their trade and run more efficient, profitable businesses. Although we feel confident in saying that we are the best construction industry school for contractors in the state – with more than two dozen locations – it’s the thousands of people whose dreams we have helped turn into reality that we are most proud of.

Our school isn’t just seven times larger than the next closest competitor, but it’s one of the few around that was formed by experienced builders and instructors, not legal or insurance professionals. So, when you want to learn the construction industry the right way, and put yourself on the path to success and higher earnings, try CSLS first and see why so many others turn to us every year.
Contractors license


Our Track Record is Unbeatable

No matter what your needs, or what your budget, we have the most reliable program anywhere. Contractors State License School (CSLS) isn't just the biggest school in the state, but also the industry leader for more than 25 years. That's why we guarantee the success of every student, every time.
99% of Our Students Pass On the First Try

Although there are a few other schools around the state who boast pass rates of 90%, or even 95%, those statistics include students who take the test several times. If you want the best shot at becoming a licensed contractor – without taking your test again and again – CSLS should be your first choice. We've helped more than 125,000 other students, and we can help you, too.
We Offer a Real Pass Guarantee

Our promise is simple, because we are so confident that you'll pass your contractors state license exam, if you go through our program, we will pay for you to retake the test if you don't pass on the first try! See details
CSLS Uses a Teaching Method You Won't Find Elsewhere

All of our study materials are based on the "Mizener Method," which was developed by our founder and is the key to our home study materials, which have been used by tens of thousands of students.