California contractor exam prep

Pass the exam on the first try.

Peerless is the oldest contractor school in California. We provide straightforward study tools built by construction educators and reviewed by working contractors—so you know what to study and why it matters.

Peerless is the oldest contractor school in California. We provide straightforward study tools built by construction educators and reviewed by working contractors—so you know what to study and why it matters.

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California contractor exam prep since 1953

proven study system to pass the exam

10k
contractors helped
97%
pass rate
Peerless
Money Back Guarantee

Study options

Choose the materials you need

Start with one trade, add the study guide, or prepare for both your trade and Law & Business.

Bronze

Basic exam prep for your specialty trade

$ 150

What you get:

  • ✓ One course book covering your chosen specialty trade (see our options below)
  • OR Set of practice exams for your chosen specialty trade (comes with 6-8 exams of 100 questions each)
  • ✓ Email Support
Enroll

Silver

Be even more prepared with extra exams and course materials for your specialty trade

$ 250 Save $50

What you get:

  • ✓ One course book covering your chosen specialty trade (see our options below)
  • ✓ Set of practice exams for your chosen specialty trade (comes with 6-8 exams of 100 questions each)
  • ✓ Email Support
Enroll
Most popular

Gold

Be fully prepared for your Law and Business AND specialty trade test

$ 375 Save $225

What you get:

  • ✓ One course book covering your chosen specialty trade (see our options below)
  • ✓ Set of practice exams for your chosen specialty trade (comes with 6-8 exams of 100 questions each)
  • ✓ Set of practice exams for Law and Business
  • ✓ Priority Email Support
Enroll

Think you're ready? Take a free practice test

Popular: Law and Business C-10: Electrical C-36: Plumbing General Building (B) C-20: HVAC C-39: Roofing C-5: Framing
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How our pricing compares

Prices verified August 5, 2026

Peerless online practice exam

$150

Online practice exam for one trade, auto-graded, answer explanations

Practice questions Published per trade (13,901 total)

Peerless Silver bundle

$250

Printed study guide book plus the online practice exam

Practice questions Published per trade

Peerless Gold bundle

$375

Book and practice exam, plus Law & Business

Practice questions Published per trade

CSLS Home Study

$295

Law & Business binder, trade binder, online audio/video, practice exams

Practice questions Not disclosed

Contractor License Guru trade kit

$300–$495

Printed manual, optional audio/video, online or paper practice exams

Practice questions Not disclosed

Price Comparison →

California contractor exam prep guides

Free, source-backed guides to the CSLB exams — by trade, by topic, and by region.

Start here

Law & Business

Trade guides

By area

About & compare

We have courses for the following specialties

Proven results

Load calculation questions were the hardest for me. The diagrams in the study guide showed me how the parts connect, and after that the practice questions made sense.

Rafael Los Angeles, CA  · Electrical (C-10)

English is not my first language and the state material was very hard to read. The Peerless guide puts drawings next to the text, so I could understand even when the words were difficult.

Wei San Gabriel, CA  · Cabinet & Millwork (C-6)

Subfloor and moisture questions were harder than I expected. Glad I studied instead of just trusting my experience.

Brett San Juan Capistrano, CA  · Flooring (C-15)
Read all customer reviews