ICC B1 (Residential Building Inspector) certification: exam, cost and steps

This page puts the whole route in order and links the guide that covers each step in full.

The steps, in order

1. Confirm B1 is the exam you need. B1 is residential. B2 is commercial, and R5 is a designation ICC grants once you hold four residential certifications. The B1, B2 or R5 comparison sets them side by side, and B1 is the shared first step for several of them.
2. Check your state or employer's rule. Some states ask for B1 plus other exams, years of experience, a state class or a state licence. Look up your state in building inspector certification by state before you pay for anything.
3. Read the outline and pick a study route. ICC publishes seven content areas with weights. Wall construction and coverings is the largest at 27%. The B1 exam outline guide explains each area, and the six-week study plan turns it into a schedule.
4. Pick the IRC edition and tab it. ICC lists the B1 on the 2021 and 2024 code years. Buy the book that matches the edition you book, then set it up with permanent tabs. The 2021 or 2024 IRC guide covers the choice and the IRC tab list covers the tabs.
5. Buy and book the exam. You buy the exam on ICC's store, then schedule it through ICC's PRONTO system, either remotely with a proctor or at a test center. The ICC exam schedule and booking guide walks through when you can test and the booking screens.
6. Sit the exam. Bring only what ICC's test-site rules allow, and keep a steady pace.
7. Read your result. ICC says results appear immediately on the testing site. If you do not pass, the report shows how you did by content area. The results and retakes guide explains the 75 scaled score and the retake limits.
8. Keep the certification current. See "How to keep it" below.

Who it is for

B1 is for people who inspect residential construction: new inspectors starting at a building department, plan reviewers and field inspectors who want a recognised credential, contractors and tradespeople moving into inspection, and private-provider staff. It fits work on houses, duplexes and townhomes. If your job is commercial buildings, the B2 is the exam to look at, and the comparison guide in step 1 explains the gap. If you are still deciding whether inspection is the right move, how to become a building inspector lays out the route into the job. For what the job pays, the building inspector salary guide gives the BLS national median and the top-paying states.

You do not need to be hired as an inspector before you sit the exam. ICC sells it to candidates directly, and the exam checks what you know, not where you work. Whether an employer or state then accepts it on its own is a separate question, which is why step 2 comes before you spend money.

What the ICC Residential Building Inspector (B1) exam looks like

The B1 is 60 multiple-choice questions in 2 hours, and it is open book. That leaves about 2 minutes a question, so most of the work is finding the right section of the IRC quickly, then reading its conditions carefully. Knowing the code helps. Knowing where it lives in your own book is what saves time.

The questions follow ICC's published content outline: wall construction and coverings (27%), public safety and special construction (17%), footings and foundations (16%), floor construction (14%), roof and ceiling construction (14%), building planning (8%) and code administration (4%). Prepare in proportion to those weights, and give extra time to whichever area your own practice shows is weakest.

You may bring the IRC for the edition you booked. ICC says hardcopy books are allowed, and tabs must be permanently attached. Loose papers and photocopies of copyrighted material are not allowed. Read ICC's test-site rules again before exam day, because they are ICC's to change.

What it costs

The B1 has a $320 list price per attempt on ICC's store, and ICC says members receive discounted pricing. Each attempt is a new fee. In-person testing adds a separate premium, and an exam purchase is valid for 365 days. Your book and study materials are extra. The exam cost calculator adds your own book, prep and retake costs into one total.

How long it takes

The exam itself takes 2 hours. Most of the calendar time goes on study, and that depends on how much residential construction you already know. Someone who frames or inspects every day may need less time than someone new to the trade. Our 90-day plan for people new to construction and 30-day plan show both ends. Allow a few days for booking, since you must buy the exam before you can schedule it.

If you do not pass

A failed attempt costs a fee, and ICC allows six attempts within six months for national certification exams. Use the content-area report to decide what to study before you pay again. Our retake guide shows how to turn that report into a plan.

How to keep it

ICC certifications are not for life. ICC runs a renewal cycle with continuing education, and the rules are on ICC's own pages, so read the administrative rules for the current cycle and requirements before your certificate comes due. A state licence or agency certificate may have its own term and its own continuing education hours, and those are separate from ICC's. Keep a dated record of your result, your code year and your renewals.

Check where you stand before you pay for the exam

Every attempt costs a fee, so go in knowing your weak areas. Take the free 10-question check. It scores you by B1 outline area in minutes, with no signup, and explains every answer. The Rafter Tie course adds timed practice exams, a lesson for each outline area and a study plan built from your exam date.

Related exam prep

• ICC B1 exam prep: what to do from booking to exam day: the steps from booking the exam to sitting it.
• CHST construction safety exam prep on Toe Board: for inspectors who also work on active job sites.

FAQ

What is ICC B1 certification?

It is the International Code Council's Residential Building Inspector certification. You earn it by passing the B1 exam, which covers one- and two-family dwellings, townhomes up to three stories and accessory structures under the IRC.

How do I get ICC B1 certification?

Check that B1 is the exam your state or employer names, study the outline, pick your IRC edition, buy the exam from ICC, book it through PRONTO and pass it. The steps above put them in order.

Is the ICC B1 exam open book?

Yes. You may use the IRC for the edition you booked, with permanently attached tabs. Loose papers and photocopies of copyrighted material are not allowed.

How many questions are on the ICC B1 exam?

There are 60 multiple-choice questions, and you have 2 hours.

How much does ICC B1 certification cost?

The exam has a $320 list price per attempt on ICC's store. Members receive discounted pricing, in-person testing adds a premium, and each retake is another fee.

Do I need B1 to be a building inspector?

It depends on your state and employer. Many name it for residential roles, and some also ask for experience, a class or a state licence. Check your state's rule first.

What is the difference between ICC B1 and R5?

B1 is a single exam. R5 is a designation ICC grants once you hold B1, E1, M1 and P1. See the comparison guide.

Sources

Show the list

• B1 content outline, International Code Council.
• B1: Residential Building Inspector, International Code Council.
• Current Certification Exams: National Exams, International Code Council.
• What should I bring to the test site?, International Code Council.
• PRONTO and After the Exam, International Code Council.
• How often can I test? and Administrative rules, International Code Council.