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Free 10-question check · no signup

Free ICC B1 practice test

Start this free ICC B1 practice test with 10 original questions. See your score by published Residential Building Inspector outline domain and practice reference navigation with your own licensed IRC copy.

Start the free 10-question checkOr take the 25-question timed practice test (about 50 minutes)
  • 10 questions, untimed
  • Answers explained as you go
  • Scored by domain

Full ICC B1 course: $99, available now. See what's inside →

Exam at a glance

Format
60 questions in 120 minutesBook: open
Delivery
Not listed in the exam facts
Fee
320 (catalog price; ICC says members get discounted exam pricing but the catalog does not show the member price)
Retakes
Not listed in the exam facts

What it covers

Code Administration4%
Building Planning8%
Footings and Foundations16%
Floor Construction14%
Wall Construction and Coverings27%
Roof/Ceiling Construction14%
Public Safety and Special Construction17%

Diagnostic questions follow these domains, subject to the available practice questions.

Original practice questions written to the published content outline. Never real or recalled exam questions.

How it works

  1. Answer

    10 questions, untimed. Check each answer to see why it's right, with a hint where one helps.

  2. See your score

    Blueprint-weighted, broken down by domain, with your weakest one named.

  3. Study smarter

    Add your email and exam date for a study plan. Ready for exam pace? The 25-question timed practice test pauses and saves your place.

The ICC B1 course

Available now · instant access

Learn how the IRC is laid out, drill finding sections fast, then practice.

  • 7modules of lessonsEvery task on the outline
  • 2full-length timed exams60 questions in 120 minutes each
  • 300practice questionsEach one explained
  • 4worked calculationsStep by step
  • 60code-navigation drillsFind it fast in IRC
  • 1week-by-week study planSet to your exam date
See all 7 modules
  1. How the IRC works and how an inspector uses it
  2. Planning: separations, siting and room sizes
  3. Footings and foundations
  4. Floors, slabs and crawl spaces
  5. Walls: framing, bracing, masonry and coverings
  6. Roofs, attics and chimneys
  7. Life safety: egress, stairs, alarms and glazing

Question bank and timed exams · Expert review in progress: questions marked Reviewed were checked by a building inspection professional with 15 years in the industry (Oct 19, 2026). The newest questions are still being reviewed. Every answer key is confirmed by a separate blind solve, and reported errors are fixed within 2 business days.

The Rafter Tie app

Study for the ICC B1 anywhere you are

We're building Rafter Tie for iPhone and Android, so your practice questions, study plan and timed exams are always one tap away.

  • Today's questions, aimed at your weakest domain
  • Your week's plan, counting down to exam day
  • The same original questions and explanations as the site
Get notified when it's out
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Early designs of the Rafter Tie app. Until it's out, everything here works in your phone's browser.

Free ICC B1 study plan

A week-by-week plan from today to your exam, weighted to the published exam outline. We show it here and email you a copy.

Practice test FAQ

How long is the free diagnostic?

The free check has 10 questions, is untimed and takes about 20 minutes. You see the answer and explanation after each question. It is a short study check, rather than a full-length exam simulation. Want exam pace? The 25-question timed practice test is also free. You can pause it, and it saves your place.

Is this an ICC Residential Building Inspector practice exam?

Yes. This short diagnostic is for Residential Building Inspector B1 preparation, rather than other ICC certifications or a full exam simulation. Check your selected code cycle before studying and use your own licensed IRC copy. We do not reproduce code text or tables.

Is the diagnostic free?

Yes. You can start the diagnostic and see your score and domain breakdown for free, with no signup or payment.

Where does the practice content come from?

These are original practice questions written to the published outline. We never use real or recalled exam items. Treat the results as a starting point for study.

How is the diagnostic scored?

Practice items are grouped by the published outline's domains, subject to available questions. The diagnostic weights domain results using the configured published outline weights. This practice percentage helps set study priorities; it does not predict your exam score or certification outcome.

What do I see after finishing?

You see your overall practice score, a domain breakdown and your weakest domain. Use those results alongside the published outline to choose topics to revisit.

How should I use the result to study?

Review the domains where you struggled, compare them with the published outline and return to your study references. A short diagnostic samples only part of the content; completing it does not establish exam readiness.

  1. 01Free ICC B1 check10 questions, untimed, about 20 minutes. Answers explained as you go.Start free
  2. 02Free sample lessonHow the IRC works and how an inspector uses it: a full lesson from the course, plus 3 practice questions with explanations.Read the sample
  3. 03B1 course with IRC navigation drills$99. Lessons, timed practice exams and a plan around your exam date.See the plans

Want the full picture first?Format, domains, references and published sources in one page.

Read the ICC B1 exam guide