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Question 1

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Per the IBC, which document establishes the legal authority of the building official to review construction documents and issue permits?

The adopted International Building Code

Chapter 1 of the IRC

Chapter 11 of the IBC

Appendix J of the IBC

to track

2026 Statistics

Key Facts: ICC B3 Exam

80 Qs

Exam Questions

Open-book

3.5 hrs

Time Limit

210 minutes

Passing Score

Scaled score

$219-$279

Exam Fee

ICC member discount

IBC + A117.1

Reference Codes

2024 editions

50 States

Recognition

ICC certification

The ICC B3 exam has 80 multiple-choice questions with a 3.5-hour (210-minute) time limit in an open-book format. You must achieve a scaled score of 75, which corresponds to approximately 75% correct (about 60 of 80). The exam is based primarily on the 2024 International Building Code (IBC) with references to ICC A117.1 for accessibility and limited IRC content. The exam fee ranges from $219-$279 depending on ICC membership status. Testing is available at Pearson VUE centers or via ICC PRONTO remote proctoring.

Sample ICC B3 Practice Questions

Try these sample questions to test your ICC B3 exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Per the IBC, which document establishes the legal authority of the building official to review construction documents and issue permits?

A.The adopted International Building Code

B.Chapter 1 of the IRC

C.Chapter 11 of the IBC

D.Appendix J of the IBC

Explanation: IBC Chapter 1 (Scope and Administration) establishes the scope, applicability, and the building official's authority to review documents, issue permits, and enforce the code. Until a jurisdiction formally adopts the IBC by ordinance or statute, it has no legal force. Exam tip: Almost every administration question traces back to IBC Chapter 1 — tab Sections 101-116.

2Under IBC Section 107, which of the following is generally required as part of the submitted construction documents for a commercial building permit?

A.Contractor's business license

B.Site plan showing building location, setbacks, and size

C.Warranty deed for the property

D.Environmental impact statement

Explanation: IBC 107.2 requires construction documents sufficient to show code compliance, including a site plan showing the size and location of new and existing structures, setbacks, means of egress facilities, and accessible routes. The building official may waive requirements for minor work. Exam tip: Section 107 is the 'construction documents' section — memorize what is and is not required.

3According to IBC Chapter 1, how long is a permit generally valid before becoming invalid if work has not commenced?

A.30 days

B.90 days

C.180 days

D.1 year

Explanation: IBC 105.5 states that permits become invalid if authorized work is not commenced within 180 days after permit issuance, or if the authorized work is suspended or abandoned for 180 days after the time the work is commenced. Exam tip: The 180-day rule is one of the most commonly tested administrative items — know it cold.

4Per IBC 107.3.4, how long must approved construction documents typically be maintained by the building department?

A.Until the certificate of occupancy is issued

B.For 90 days after final inspection

C.As required by applicable laws, which is often a minimum of 180 days after completion

D.Permanently in all cases

Explanation: IBC 107.3.4 requires the building official to retain one set of approved construction documents for a minimum period as required by other laws or ordinances, but not less than 180 days from the date of completion of the work. Many jurisdictions retain them far longer. Exam tip: The 180-day retention minimum is a frequent administration question.

5Which IBC provision allows the building official to approve alternative materials, design, and methods of construction not specifically prescribed by the code?

A.Section 104.11

B.Section 202

C.Section 1705

D.Section 2901

Explanation: IBC 104.11 permits the building official to approve alternative materials, design, or methods of construction when the proposed alternative is, for the purpose intended, at least the equivalent of that prescribed in the code in quality, strength, effectiveness, fire resistance, durability, and safety. Exam tip: 104.11 is how innovative materials and engineered designs get into buildings — plans examiners cite it routinely.

6A 6,000 sq ft coffee shop with seating for 110 customers would be classified under which IBC occupancy group?

A.Group B

B.Group A-2

C.Group M

D.Group A-3

Explanation: Per IBC 303.3, Group A-2 includes occupancies intended for food and/or drink consumption, such as restaurants, banquet halls, nightclubs, and taverns, when occupant load is 50 or more. A coffee shop serving 110 people qualifies. If occupant load were under 50, it would be classified as Group B per IBC 303.1.2. Exam tip: The 50-occupant threshold between A-2 and B is a classic exam question.

7Per IBC 310.4, a residential care facility housing 20 ambulatory residents who need personal care services is classified as which occupancy group?

A.Group I-1

B.Group I-2

C.Group R-3

D.Group R-4

Explanation: Per IBC 308.3, Group I-1 includes buildings that provide custodial care for more than 16 persons who are capable of self-preservation and who live on a 24-hour basis in a supervised environment. Assisted living facilities are a common example. If there were 16 or fewer residents, the facility would likely fall under R-4. Exam tip: Residential care classifications hinge on capability of self-preservation AND number of residents.

8Per IBC Table 601, what is the minimum required fire-resistance rating for structural frame members in Type IIA construction?

A.0 hours

B.1 hour

C.2 hours

D.3 hours

Explanation: IBC Table 601 specifies a 1-hour fire-resistance rating for structural frame, bearing walls, floors, and roof members in Type IIA construction. Type IIB, which uses noncombustible materials but is unprotected, has a 0-hour rating for most elements. Exam tip: Table 601 is the most-referenced table on the B3 exam — tab it and know the rating pattern across Types I through V.

9A Group B office building of Type IIB construction is proposed. With no sprinklers, what is the maximum number of stories above grade plane permitted by IBC Table 504.4?

A.2 stories

B.3 stories

C.4 stories

D.5 stories

Explanation: Per IBC Table 504.4, a Group B in Type IIB construction is limited to 3 stories above grade plane without a sprinkler system. With an NFPA 13 sprinkler system throughout, the height increase permits up to 4 stories. Exam tip: Sprinklers almost always add 1 story and 20 feet of height under IBC 504.2, but verify against Table 504.4 for your occupancy and type.

10When two occupancy groups are located in the same building and not separated by fire barriers, what method does IBC 508.3 allow for compliance?

A.Nonseparated occupancies, treating the entire building to the most restrictive provisions

B.Accessory occupancies only

C.Incidental uses per Table 509

D.Separated occupancies based on Table 508.4

Explanation: IBC 508.3 allows buildings with two or more occupancies to be designed as nonseparated occupancies, in which case the entire building must comply with the most restrictive provisions of Chapter 9 (fire protection) and the area and height limits of the most restrictive group present. No fire barrier separation between the occupancies is required. Exam tip: Nonseparated is simpler to draw but often more expensive because sprinkler and rating requirements follow the most restrictive use.

About the ICC B3 Exam

The ICC Building Plans Examiner (B3) exam is administered by the International Code Council and certifies individuals to review commercial and mixed-use construction documents for compliance with the International Building Code before a permit is issued. The open-book exam covers occupancy classification, construction types, fire-resistance-rated construction, means of egress, structural provisions, interior finishes, accessibility, and special inspections. ICC B3 certification is recognized in all 50 states and is a core credential for plan review staff in city, county, and state building departments. The B3 is frequently paired with the B2 Commercial Building Inspector credential.

Questions

80 scored questions

Time Limit

3.5 hours (210 minutes)

Passing Score

75 (scaled score)

Exam Fee

$219-$279 (ICC (Pearson VUE / PRONTO))

ICC B3 Exam Content Outline

General Administration and Legal

Code scope, permits, construction documents, building official authority, and plan review workflow

10%

Occupancy Classification and Construction Type

IBC Groups A-U, mixed occupancies, Type I-V construction, allowable height and area limits

20%

Fire-Resistance-Rated Construction

Fire walls, fire barriers, fire partitions, smoke barriers, opening protectives, and penetrations

20%

Means of Egress

Occupant load, travel distance, corridor rating, stairway design, exit signs, and exit discharge

15%

Structural Provisions

Design loads, load combinations, foundations, materials, and special inspections

10%

Interior Finishes and Environment

Interior wall/ceiling finish classifications, decorative materials, light, ventilation, and sanitation

10%

Accessibility

IBC Chapter 11 and ICC A117.1 scoping and technical requirements for accessible building elements

10%

Building Envelope and Special Topics

Exterior walls, roof assemblies, glazing, atriums, high-rise, and special occupancies

How to Pass the ICC B3 Exam

What You Need to Know

Passing score: 75 (scaled score)
Exam length: 80 questions
Time limit: 3.5 hours (210 minutes)
Exam fee: $219-$279

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 B3 Study Tips from Top Performers

1Tab your IBC extensively — mark Table 504.3 and 506.2 (allowable height and area), Table 601 (fire-resistance ratings by construction type), Table 705.5 (exterior wall ratings by fire separation distance), Table 716.1 (opening protectives), Table 1004.5 (occupant load factors), and Table 1017.2 (common path and travel distance)

2Focus heavily on Means of Egress (20% of exam) — know IBC 1005 egress width calculations (0.3 inch/person for stairs, 0.2 inch/person for other egress), 1006.2.1 spaces with one exit, 1011.5 stair geometry (7-inch max riser, 11-inch min tread for commercial), and 1020 corridor fire-resistance

3Master fire-resistance construction — be able to distinguish fire walls (IBC 706), fire barriers (707), fire partitions (708), smoke barriers (709), and smoke partitions (710) by rating, continuity, and opening protective requirements. These distinctions drive many exam questions.

4Practice occupancy classification and allowable area calculations — read a short narrative (Group B, Type IIB, 3 stories, sprinklered) and compute allowable area using the Equation 5-2 formula (Aa = (At + NS × If) × Sa). Plan reviewers do this on every project.

5Know ICC A117.1 key dimensions cold — 60-inch turning space, 48-inch-high reach over a 24-inch obstruction, 34-36 inch grab bar height, 17-19 inch water closet height, 36-inch minimum accessible route width, and 1:12 maximum ramp slope. Accessibility is 10% of the exam and these numbers come up repeatedly.

Frequently Asked Questions

What score do I need to pass the ICC B3 exam?

The ICC B3 exam requires a scaled score of 75 to pass, which corresponds to approximately 75% of questions answered correctly (about 60 out of 80 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 so you know what to study before retaking. The scaled score is set by the ICC Exam Development Committee.

Is the ICC B3 exam open-book?

Yes, the ICC B3 exam is open-book. You are allowed to use the International Building Code (IBC) and ICC A117.1 as your primary references during the exam. You can tab, highlight, and annotate your codebooks. With 80 questions in 210 minutes you have about 2.6 minutes per question, so codebook fluency matters more than memorization. Most successful candidates tab the IBC Table 503 (height and area), Table 601 (fire-resistance ratings), Table 1004.5 (occupant load), and Chapter 10 egress sections before test day.

How hard is the ICC B3 exam?

The ICC B3 exam is considered one of the more challenging ICC exams because plan review requires applying multiple code sections at once. Means of Egress (20%) and Fire-Resistance-Rated Construction (20%) together make up 40% of the exam and tend to cause the most failures. Questions often give a scenario (occupancy group, area, stories, construction type) and ask you to compute allowable area, required rating, or occupant load. Candidates who practice calculation-style questions and develop a systematic plan review checklist perform best.

Which codebook do I need for the ICC B3 exam?

The ICC B3 exam is based primarily on the International Building Code (IBC) and ICC A117.1 Accessible and Usable Buildings and Facilities. Check the current exam bulletin on the ICC Exam Catalog to confirm which edition year is being tested — as of 2026 most B3 candidates are testing on the 2024 IBC. You can purchase official editions from the ICC store. A limited amount of IRC content can also appear where the IBC references residential provisions.

What jobs can I get with ICC B3 certification?

ICC B3 certification qualifies you for commercial plans examiner and combination plan reviewer positions with city, county, and state building departments, as well as private third-party plan review firms. Salaries typically range from $60,000-$100,000 depending on location and experience. Many jurisdictions list B3 as a required or preferred credential on plans examiner job postings. The B3 is commonly paired with the B2 Commercial Building Inspector credential and counts toward the Certified Building Official (CBO) designation.

How do I prepare for the ICC B3 exam?

Start by obtaining the correct IBC edition and ICC A117.1 referenced on the current exam bulletin, then work through Chapters 3-10 of the IBC in depth. Tab Table 504.3/504.4 (height), Table 506.2 (area), Table 601 (fire-resistance), Table 705.5 (exterior wall ratings), Table 1004.5 (occupant load factors), and Table 1017.2 (travel distance). Use the ICC Exam Prep Study Companion and practice exams. Focus heavily on means of egress and fire-resistance. Complete at least three full-length timed 80-question mocks before scheduling your exam.