- NC-RC Exam Overview
- Why the Domain Breakdown Matters
- Domains 1-3: Site Work, Concrete, and Masonry
- Domains 4-6: Carpentry, Associated Trades, and Roofing
- Domain 7: Estimating, Plan Reading and General Residential Code Requirements
- Domains 8-10: Safety, Licensing/Business, and Special Construction Zones
- Domain Comparison at a Glance
- Building a Domain-Based Study Timeline
- Registration, Fees, and License Tiers
- Who Hires NC-RC Licensees
- Frequently Asked Questions
- The NC-RC exam covers 10 named domains, with Estimating, Plan Reading and General Residential Code Requirements the largest at 16 scored questions.
- The exam has 90 scored questions plus up to 5-10 unscored experimental items, in a 3.5-hour open-book format.
- Passing requires 70%, and the exam is based on the 2018 North Carolina Residential Code with the current PSI bulletin updated November 19, 2025.
- You'll need approved references with permanent tabs and a silent nonprogrammable calculator during the test.
NC-RC Exam Overview
The North Carolina Residential Contractor License Exam (NC-RC) is governed by the North Carolina Licensing Board for General Contractors and administered through PSI as a computer-delivered, open-book test. Candidates get three hours and 30 minutes to answer 90 scored questions, and the exam may quietly mix in five to 10 unscored experimental questions that look identical to the graded ones. The exam costs $79 and requires a 70% score to pass. Because it's open-book, you're allowed to bring approved references into the testing room as long as they have permanent tabs, along with a silent nonprogrammable calculator.
All of this content is built around the 2018 North Carolina Residential Code, and the current PSI bulletin was updated November 19, 2025 - a detail worth confirming before every study session, since bulletins can shift references or logistics. If you haven't reviewed eligibility yet, the NC-RC Requirements 2026: Eligibility, Prerequisites & How to Qualify guide covers age, moral character, and financial responsibility standards before you even sit for this exam.
Why the Domain Breakdown Matters
Unlike a generic multiple-choice test, the NC-RC exam is organized into 10 clearly defined content areas that mirror actual residential construction work - from footings to final licensing paperwork. Knowing exactly what falls under each domain lets you triage your study time instead of re-reading the entire residential code cover to cover. Some domains are narrow and technical (masonry, concrete reinforcement), while others are broad and code-heavy (estimating and plan reading), so treating them as equal is a common and costly mistake.
This article walks through all 10 domains in the order the Board lists them, explains what each one actually tests, and shows where the heaviest content weight sits. For a deeper look at exam difficulty and pacing, pair this with How Hard Is the NC-RC Exam? Complete Difficulty Guide 2026.
Domains 1-3: Site Work, Concrete, and Masonry
The first three domains build the physical foundation of a residential structure, literally and conceptually. Expect questions on soil conditions, layout, footing dimensions, reinforcement placement, and masonry unit selection.
Domain 1: Site Work, Footings and Foundations
Covers site preparation, excavation, footing design basics, and foundation systems that support the rest of the structure.
- Footing sizing relative to soil-bearing conditions
- Foundation wall types and drainage considerations
- Site grading and setback awareness
Domain 2: Concrete and Concrete Reinforcement
Focuses on mix requirements, curing, formwork, and reinforcement placement rules that keep concrete elements structurally sound.
- Rebar spacing and coverage requirements
- Slab and footing concrete specifications
- Formwork and curing timelines
Domain 3: Masonry
Tests knowledge of masonry unit types, mortar joints, veneer attachment, and code-driven masonry practices used in residential construction.
- Masonry veneer ties and flashing
- Mortar joint types and applications
- Chimney and fireplace masonry basics
Domains 4-6: Carpentry, Associated Trades, and Roofing
These three domains cover the structural framing and enclosure systems that make up the bulk of a home's shell. Carpentry is the most hands-on domain, while Domain 5 pulls in multiple associated trades under one umbrella.
Domain 4: Carpentry
Covers framing systems, floor and roof joists, headers, and general wood construction practices tied to the 2018 North Carolina Residential Code.
- Framing member sizing and spacing
- Header and beam span basics
- Sheathing and fastening schedules
Domain 5: Associated Construction Trades, Including Energy Conservation and Drywall
A broad domain combining insulation and energy code compliance with interior finish trades like drywall installation.
- Insulation R-values and vapor barrier placement
- Drywall fastening and finishing basics
- Energy conservation code touchpoints
Domain 6: Roofing
Tests roof framing, covering materials, ventilation, and flashing details that keep a residential roof system code-compliant.
- Roof pitch and load considerations
- Flashing and underlayment requirements
- Ventilation and attic moisture control
Key Takeaway
Domains 4-6 span framing through finish trades, so don't assume "carpentry" questions only test wood - energy conservation and drywall content live in Domain 5 and can surprise unprepared candidates.
Domain 7: Estimating, Plan Reading and General Residential Code Requirements
This is the single largest official content area on the NC-RC exam, carrying 16 scored questions - more than any other domain. It combines two very different skill sets: reading and interpreting residential construction plans, and applying general code requirements plus cost/quantity estimating logic.
Domain 7: Estimating, Plan Reading and General Residential Code Requirements
The heaviest domain on the exam, blending plan interpretation with code application and estimating fundamentals.
- Reading residential plan symbols, scales, and sections
- Applying general 2018 NC Residential Code requirements across trades
- Basic material quantity and cost estimating logic
Because this domain touches nearly every other trade area on the exam, it deserves disproportionate attention relative to its already-large scored question count. If you're building a study plan, this is the domain to schedule extra review sessions around - a point covered in more depth in NC-RC Study Guide 2026: How to Pass on Your First Attempt. For a quick reference sheet you can drill repeatedly, the NC-RC Cheat Sheet 2026: One-Page Review of Must-Know Facts is built with this domain's weight in mind.
Domains 8-10: Safety, Licensing/Business, and Special Construction Zones
The final three domains shift away from pure construction technique and into safety compliance, business operations, and region-specific code overlays.
Domain 8: OSHA Safety
Covers jobsite safety fundamentals that any licensed residential contractor is expected to know and enforce on-site.
- Fall protection and ladder safety basics
- Trench and excavation safety rules
- General jobsite hazard awareness
Domain 9: Licensing and Business and Law
Tests knowledge of contractor licensing rules, business practices, and legal obligations specific to North Carolina residential contracting.
- License tiers and qualifier responsibilities
- Contract and business law basics
- Renewal and continuing education obligations
Domain 10: Special Construction Zones (Wind and Coastal) and Erosion and Sedimentation Control
Addresses the additional code requirements that apply in North Carolina's designated wind and coastal zones, plus erosion control practices during construction.
- Wind-resistant construction detailing in coastal zones
- Erosion and sedimentation control measures
- Special inspection or permitting triggers in high-wind areas
Domain 9 in particular overlaps heavily with the licensing mechanics described later in this article, so studying it alongside the actual application process - not in isolation - tends to make the material stick better.
Domain Comparison at a Glance
| Domain | Focus Area | Notable Detail |
|---|---|---|
| 1 | Site Work, Footings and Foundations | Foundation systems and site prep |
| 2 | Concrete and Concrete Reinforcement | Mix design and rebar placement |
| 3 | Masonry | Veneer, mortar, and unit types |
| 4 | Carpentry | Framing and structural wood members |
| 5 | Associated Trades, Energy Conservation and Drywall | Broadest cross-trade domain |
| 6 | Roofing | Coverings, flashing, ventilation |
| 7 | Estimating, Plan Reading and General Residential Code Requirements | Largest domain: 16 scored questions |
| 8 | OSHA Safety | Jobsite hazard and safety rules |
| 9 | Licensing and Business and Law | Qualifier and renewal obligations |
| 10 | Special Construction Zones and Erosion/Sedimentation Control | Coastal wind zones and erosion control |
Building a Domain-Based Study Timeline
Rather than studying domains in the order they're listed, sequence your review around content weight and overlap. Domain 7 deserves the most calendar time given its 16-question weight and its tendency to pull concepts from other domains. Here's a sample structure candidates can adapt:
Foundational Trades
- Review Domains 1-3: site work, concrete, and masonry
- Practice reading foundation and footing details on sample plans
Structural and Envelope Trades
- Cover Domains 4-6: carpentry, associated trades, and roofing
- Focus extra time on Domain 5's energy conservation content
Estimating and Code Deep Dive
- Concentrate on Domain 7 given its 16-question weight
- Drill plan-reading exercises alongside 2018 NC Residential Code sections
Safety, Business, and Special Zones
- Finish with Domains 8-10: OSHA, licensing/business, and coastal/wind zones
- Run full-length timed practice sessions under the 3.5-hour open-book format
Use full-length practice sessions on the main practice test platform during your final week to simulate real exam pacing before test day.
Registration, Fees, and License Tiers
Passing the domain content is only half the equation - the licensing mechanics around the NC-RC exam matter just as much. Applicants must be at least 18 years old, demonstrate good moral character and financial responsibility, and designate a qualifier who carries responsibility for the license.
License tiers determine your project ceiling, not your exam content:
- Limited license: $75 Board application fee, $750,000 project limit
- Intermediate license: $100 Board application fee, $1.5 million project limit
- Unlimited license: $125 Board application fee, no project limit
Licenses renew annually by December 31, and at least one qualifier for a Residential license must complete eight hours of continuing education each year - two mandatory hours plus six elective hours. Missing this can jeopardize an otherwise clean license. For a full cost breakdown covering both the exam and Board fees, see NC-RC Certification Cost 2026: Complete Pricing Breakdown, and if you want the exact scoring math behind the 70% requirement, check NC-RC Passing Score 2026: Exactly What You Need to Pass.
Who Hires NC-RC Licensees
Holding an NC-RC license positions you to legally contract residential construction work in North Carolina under your chosen tier's project limits. This matters to homebuilders, remodeling companies, and independent contractors who need a qualifier on record with the Board to bid and complete jobs within the Limited, Intermediate, or Unlimited caps. Understanding how the license translates into real work opportunities is worth exploring further in NC-RC Jobs and in the broader ROI discussion at Is the NC-RC Certification Worth It? Complete ROI Analysis 2026.
Before you commit to a study schedule or testing date, it's worth reviewing NC-RC Exam Dates 2026: Testing Windows, Deadlines & Scheduling so your domain review timeline lines up with your actual appointment. You can also run domain-specific practice questions on the practice test site to gauge readiness before locking in a date.
Frequently Asked Questions
There are 10 official content domains, ranging from site work and foundations through licensing, business law, and special construction zones for wind, coastal, and erosion control conditions.
Estimating, Plan Reading and General Residential Code Requirements is the largest official domain, with 16 scored questions out of the 90 total scored items.
Yes. It's a computer-delivered, open-book exam, and candidates may bring approved references with permanent tabs plus a silent nonprogrammable calculator into the testing session.
The exam runs three hours and 30 minutes, covers 90 scored questions (plus up to 10 unscored experimental questions), and requires a 70% score to pass.
No. The Limited, Intermediate, and Unlimited tiers affect your Board application fee and project dollar limits, not the 10 domains or question content on the NC-RC exam itself.