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100+ Free ICC B1 Practice Questions

Pass your ICC Residential Building Inspector (B1) exam on the first try — instant access, no signup required.

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2026 Statistics

Key Facts: ICC B1 Exam

60 Qs

Exam Questions

Open-book

2 hrs

Time Limit

2 min/question

75

Passing Score

Scaled score

$85-$150

Exam Fee

ICC member discount

IRC

Reference Code

Open-book allowed

50 States

Recognition

ICC certification

The ICC B1 exam has 60 multiple-choice questions with a 2-hour time limit in an open-book format. You must score at least 75 on a scaled score (approximately 75% correct, or 45 of 60 questions). The exam is based entirely on the International Residential Code (IRC) Chapters 1-11. The exam fee ranges from $85-$150 depending on ICC membership status. Testing is available at Pearson VUE centers or via ICC PRONTO remote proctoring 24/7.

About the ICC B1 Exam

The ICC Residential Building Inspector (B1) exam is administered by the International Code Council and certifies individuals to inspect one- and two-family dwellings, townhomes up to three stories, and accessory structures for compliance with the International Residential Code (IRC). The open-book exam tests knowledge of building planning, foundations, floor construction, wall construction, roof/ceiling construction, and public safety requirements. ICC B1 certification is recognized in all 50 states and is a critical credential for building inspection careers.

Questions

60 scored questions

Time Limit

2 hours

Passing Score

75 (scaled score)

Exam Fee

$85-$150 (ICC (Pearson VUE / PRONTO))

ICC B1 Exam Content Outline

4%

Code Administration

Building official authority, permits, inspections, certificates of occupancy, and code scope

8%

Building Planning

Stairs, egress windows, room dimensions, ceiling heights, doors, landings, and guards

18%

Footings and Foundations

Footing dimensions, foundation walls, anchor bolts, concrete specs, drainage, and waterproofing

14%

Floor Construction

Joist spans, bearing requirements, notching/boring, crawlspace, vapor retarders, and treated wood

27%

Wall Construction and Coverings

Stud spacing, headers, bracing, sheathing, fire separation, WRB, siding, and lumber grades

14%

Roof/Ceiling Construction

Rafter spans, sheathing, underlayment, flashing, ventilation, collar ties, and fastening

17%

Public Safety

Smoke/CO alarms, guards, handrails, safety glazing, fire blocking, and chimneys

How to Pass the ICC B1 Exam

What You Need to Know

  • Passing score: 75 (scaled score)
  • Exam length: 60 questions
  • Time limit: 2 hours
  • Exam fee: $85-$150

Keys to Passing

  • Complete 500+ practice questions
  • Score 80%+ consistently before scheduling
  • Focus on highest-weighted sections
  • Use our AI tutor for tough concepts

ICC B1 Study Tips from Top Performers

1Tab your IRC codebook extensively — mark footing size tables, joist span tables, stair dimensions (7-3/4 max riser, 10-inch min tread), egress window requirements (20 wide, 24 high, 5.7 sq ft), and anchor bolt specs (1/2-inch, 7-inch embed, 6 feet on center)
2Focus heavily on Wall Construction (27% of exam) — know stud spacing, header sizing, wall bracing methods, fire separation between garage and dwelling, and sheathing requirements
3Master the footing and foundation tables — practice looking up footing widths by number of stories and soil bearing capacity, foundation wall thickness, and anchor bolt placement rules
4Practice timed code lookups — the open-book format only helps if you can find answers quickly. Aim to locate any IRC section within 30 seconds during practice sessions
5Know public safety requirements cold — smoke alarm placement (every bedroom, outside sleeping areas, every level), CO alarm locations, guard heights (34 inches at stairs, 36 inches at elevated surfaces), and baluster spacing (4-inch sphere test)

Frequently Asked Questions

What score do I need to pass the ICC B1 exam?

The ICC B1 exam requires a scaled score of 75 to pass, which corresponds to approximately 75% of questions answered correctly (about 45 out of 60 questions). If you pass, you see 'PASS' on your results — no numerical score is shown for passing candidates. If you fail, you receive a diagnostic report showing your performance by content area. The exam uses scaled scoring set by the ICC Exam Development Committee.

Is the ICC B1 exam open-book?

Yes, the ICC B1 exam is open-book. You are allowed to use the International Residential Code (IRC) as your reference during the exam. You can tab, highlight, and annotate your codebook. However, with only 2 minutes per question on average, you need to be very familiar with the IRC layout and able to find information quickly. Most successful candidates tab key sections and practice code lookups before the exam.

How hard is the ICC B1 exam?

The ICC B1 exam is moderately challenging despite being open-book. Wall Construction (27%) and Footings/Foundations (18%) make up nearly half the exam. The difficulty comes from time pressure — 60 questions in 2 hours requires efficient codebook navigation. Many questions require finding specific values in IRC tables. Candidates who practice with timed mock exams and develop a systematic approach to finding code sections have the highest success rates.

What codebook do I need for the ICC B1 exam?

The ICC B1 exam is based on the International Residential Code (IRC). Check the current exam bulletin on the ICC website to confirm which edition year is being tested. You can purchase the IRC from the ICC store or use a digital version through certain testing platforms. The exam covers IRC Chapters 1-11 focusing on administration, building planning, foundations, floors, walls, roofing, and life safety systems.

What jobs can I get with ICC B1 certification?

ICC B1 certification qualifies you for residential building inspector positions with city, county, and state building departments. Average salaries range from $45,000-$70,000 depending on location and experience. Many jurisdictions require ICC certification as a condition of employment. The B1 is often combined with other ICC certifications (plumbing, electrical, mechanical) for broader inspection authority. Some inspectors work as independent consultants or for private inspection firms.

How do I prepare for the ICC B1 exam?

Start by obtaining the correct IRC edition and reading Chapters 1-11. Tab critical sections like footing tables, span tables, stair requirements, and egress window dimensions. Use ICC's official study guide and practice exams. Practice finding code sections under time pressure. Focus heavily on Wall Construction (27%) and Footings/Foundations (18%). Complete at least 3 full-length timed practice exams before scheduling your test date.