Every question is based on the official IRC 2024 code, and AI-powered explanations break down the reasoning. Start with a free 10-question diagnostic sample — no sign-up required.
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Get instant, personalized explanations for every question with direct IRC 2024 code references.
Identify weak areas and focus your study time where it matters most with detailed analytics.
Practice with timed, open-book exams that mirror the actual ICC M1 test format.
Start with the M1 today — more inspector exams are on the way.
Residential Mechanical Inspector
Full practice question bank based on the official IRC 2024 code. Available now.
Residential Plumbing Inspector
In development. Early supporters get 50% off at launch — reserve your discount now.
Residential Building Inspector
Planned. Join the waitlist and we'll email you the moment it launches.
Residential Electrical Inspector
Planned. Join the waitlist and we'll email you the moment it launches.
Choose the plan that fits your exam timeline
Plain-language guides to the IRC 2024 mechanical and fuel-gas provisions — how the exam is organized and where each rule lives. Free to read, no sign-up required.
What the exam covers, how it is weighted, and a realistic study plan.
A repeatable keyword → index → chapter → section workflow for speed.
Why appliances need combustion air and how the code's methods work.
Where each mechanical topic lives across IRC Chapters 12–24.
Everything you need to know before you start
The M1 is the ICC certification exam for residential mechanical inspectors. Our question bank and explanations are grounded in the IRC 2024 (International Residential Code).
Yes. The real M1 is an open-book exam, and our Exam Mode mirrors that timed format so you can practice locating answers in the code under realistic conditions.
You get access to a free bank of 83+ practice questions in Study Mode, each with a written explanation and the relevant IRC 2024 code reference, plus Exam Mode capped at 20 questions, up to 5 AI explanations per day, and basic progress tracking. Upgrading unlocks the full question bank, full 60-question timed exams, and unlimited AI explanations.
You can request an AI tutor explanation for any question you've answered — up to 5 per day on the free plan, and unlimited on the paid plans. Each explanation is grounded strictly in the IRC 2024 code reference for that question, so it stays exam-focused and accurate.
The 90-Day Pass is a one-time $79 payment for 90 days of full access. The Annual plan is $149/year (about $12.42/month) for a full 365 days, and includes all new M1 content and any additional exams as they launch. Retaking an ICC exam costs $320 plus weeks of lost time — prepare with confidence for just $79.
New accounts start with a 7-day trial that unlocks the full paid experience — no credit card required. When the trial ends, you can keep going on the free plan or upgrade any time.
No. CodeExam Prep runs entirely in your web browser on desktop, tablet, or phone — nothing to download or install.
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Start free today — AI-powered explanations grounded in the IRC 2024.