- Official section
- National II.B: Building codes and government controls
- Broker weight
- Part of 5% of the national broker portion
- Expected scored items
- The current PSI outline assigns Land Use Controls about 5 of the 100 scored national broker items
Real estate glossary and exam guide
Building code: minimum rules for safe, lawful construction
A finished basement can look polished and still have an egress problem. A new restaurant can fit the zoning district and still need major fire, plumbing, ventilation, accessibility, and occupancy work. Building-code questions are rarely solved by asking whether the property looks safe. Start with jurisdiction, project type, code edition, permit date, occupancy, scope of work, approved plans, inspections, and closeout. That sequence turns a vague compliance claim into a record you can verify.
Last updated: August 1, 2026
What does this exam area cover?
Short answer: A building code is an enacted public-safety standard governing covered construction, alteration, repair, occupancy, and building systems. Illinois has statewide baseline structural requirements effective January 1, 2025, plus statewide layers such as energy, accessibility, plumbing, and fire rules. Municipalities and counties can still administer locally adopted codes and amendments. A permit authorizes work, inspections test stages of work, and a certificate of occupancy addresses approved occupancy. None is a blanket warranty.
This guide follows the PSI Illinois Candidate Information Booklet effective June 24, 2026, the Illinois Capital Development Board's current code guidance, the Capital Development Board Act, the Illinois Residential Building Code Act, and Illinois energy rules checked through August 1, 2026. Public Act 103-0510 created statewide baseline building-code requirements effective January 1, 2025. The 2024 Illinois Energy Conservation Code became effective November 30, 2025. Public Act 104-0315 adjusted future Illinois Stretch Energy Code milestones. Local adoption, amendments, project funding, building category, occupancy, permit date, and the authority having jurisdiction can change the exact answer, so never assume one unamended model-code edition governs every Illinois property.
What is on the official outline?
- Topic
- Building-code purpose
- What to know
- Police power, public health, safety, welfare, structural stability, fire protection, sanitation, energy, accessibility, construction quality threshold, minimum standard, and enforcement
- Best exam move
- Treat a building code as a public control setting minimum legal requirements, not as a promise of premium construction.
- Topic
- Enacted code versus model code
- What to know
- International Building Code, International Residential Code, International Existing Building Code, model text, adoption ordinance, Illinois statute, administrative rule, edition, appendix, amendment, deletion, and effective date
- Best exam move
- A model code becomes controlling only through adoption or incorporation. Find the enacted edition and modifications.
- Topic
- Illinois statewide baseline
- What to know
- January 1 2025, Public Act 103-0510, Capital Development Board Act, new commercial, existing commercial rehabilitation, residential, structural design, minimum stringency, and local reporting
- Best exam move
- Reject the outdated blanket statement that Illinois has no statewide building-code baseline.
- Topic
- Local code jurisdiction
- What to know
- Municipality, county, adopted code, local amendment, home rule, non-home-rule, building department, official directory, ordinance, enforcement, fees, permit procedure, and inspection schedule
- Best exam move
- Verify local adoption and amendments even when a statewide minimum also applies.
- Topic
- Non-building-code jurisdiction
- What to know
- No locally adopted building code, state baseline, commercial inspection contract, qualified inspector, certification, filing before occupancy, substantial improvement, substantial damage, residential construction contract, and statewide layers
- Best exam move
- No local code does not mean no requirements. Apply the Illinois statutory path for the building and work involved.
- Topic
- Commercial baseline categories
- What to know
- New commercial building, International Building Code baseline, existing commercial building, rehabilitation, International Existing Building Code baseline, structural design, substantial improvement, occupancy, qualified inspection, and certification
- Best exam move
- Separate new commercial construction from work on an existing commercial building before choosing the baseline.
- Topic
- Residential baseline categories
- What to know
- New home, International Residential Code, local residential code, code within 100 miles, buyer-builder agreement, written contract, no agreement, energy code, plumbing code, and current edition
- Best exam move
- In a non-code jurisdiction, read the residential construction contract and 815 ILCS 670/15 instead of assuming no code applies.
- Topic
- Statewide code layers
- What to know
- Illinois Energy Conservation Code, Illinois Accessibility Code, Illinois Plumbing Code, Fire Prevention and Safety Rules, NFPA 101 applicability, state-funded building, public school, agency rule, and local overlay
- Best exam move
- A locally adopted structural code is only one layer of the compliance analysis.
- Topic
- Energy code current edition
- What to know
- 2024 Illinois Energy Conservation Code, November 30 2025, 2024 IECC, Illinois amendments, commercial, residential, additions, alterations, renovation, repair, permit application, local AHJ, and statewide application
- Best exam move
- Use the Illinois code and effective date, not an unamended IECC book or an earlier edition remembered from class.
- Topic
- Stretch Energy Code
- What to know
- Municipal adoption, residential component, commercial component, stricter performance, replacement of base energy code, state-funded projects, Public Act 104-0315, future milestones, and adoption date
- Best exam move
- Do not apply stretch requirements to every private project. Confirm local adoption and the relevant component.
- Topic
- Authority having jurisdiction
- What to know
- AHJ, building official, plan reviewer, inspector, fire marshal, state agency, local department, interpretation, approval, alternative material, appeal, and written determination
- Best exam move
- Find the official with legal authority over that code layer rather than relying on a contractor's informal opinion.
- Topic
- Permit application
- What to know
- Owner, contractor, scope of work, plans, specifications, site plan, professional seal, valuation, fee, zoning clearance, review comments, revisions, issuance, expiration, and posted permit
- Best exam move
- Permit issuance authorizes the described work. It does not approve undisclosed work or guarantee final compliance.
- Topic
- Inspections
- What to know
- Footing, foundation, framing, rough electrical, rough plumbing, mechanical, insulation, fire stopping, final inspection, concealed work, correction notice, reinspection, documentation, and signoff
- Best exam move
- Match the inspection to the construction stage and do not cover work before required approval.
- Topic
- Certificate of occupancy
- What to know
- CO, approved occupancy, use group, occupant load, temporary certificate, conditions, final inspection, open permits, change of occupancy, revocation, and current use
- Best exam move
- Read what occupancy was approved and whether the certificate is final, temporary, limited, or conditioned.
- Topic
- Existing buildings
- What to know
- Lawful existing condition, maintenance, repair, alteration, addition, unsafe condition, existing-building code, compliance method, work area, historic building, change of occupancy, and retroactive rule
- Best exam move
- Replace the word grandfathered with a specific existing-building provision and project scope.
- Topic
- Change of occupancy or use
- What to know
- Occupancy classification, residential conversion, restaurant, assembly, office, retail, hazard level, egress, fire separation, sprinkler, ventilation, plumbing fixtures, accessibility, zoning, and new CO
- Best exam move
- A use change can trigger code work even when little physical construction is proposed.
- Topic
- Violations and enforcement
- What to know
- Unpermitted work, stop-work order, notice of violation, unsafe structure, correction, reinspection, fine, permit revocation, occupancy restriction, demolition process, lien, appeal, and due process
- Best exam move
- Identify the violation, responsible authority, correction route, deadline, and appeal right before promising a result.
- Topic
- Transaction due diligence
- What to know
- Permit search, approved plans, inspection history, open permit, code case, certificate of occupancy, zoning, seller disclosure, home inspection, repair invoice, contractor license, insurance, lender, appraisal, and attorney review
- Best exam move
- Verify the public file and actual work. A renovated appearance or seller statement does not close permits.
- Topic
- Broker role and limits
- What to know
- Observable red flag, material fact, disclosure duty, no concealment, no technical diagnosis, no code interpretation, recommend expert, written record, advertising accuracy, buyer intended use, and referral
- Best exam move
- Describe known facts accurately and direct technical or legal conclusions to qualified professionals and the AHJ.
Which distinctions produce the most mistakes?
- Terms
- Building code vs. zoning
- Difference
- Building codes regulate covered construction, systems, safety, and occupancy. Zoning regulates land use, location, intensity, setbacks, height, and similar development controls.
- Question cue
- How it is built versus what may occur where.
- Terms
- Enacted code vs. model code
- Difference
- An enacted code is legal text adopted or incorporated by the responsible government. A model code is a publication that has no local force merely because it exists.
- Question cue
- Law in force versus source document.
- Terms
- State baseline vs. local amendment
- Difference
- The state baseline supplies required minimum treatment for covered categories. A local amendment changes the adopted local text within the limits of state law.
- Question cue
- State floor versus jurisdiction-specific rule.
- Terms
- Building permit vs. certificate of occupancy
- Difference
- A building permit authorizes described construction. A certificate of occupancy approves occupancy for a stated classification or use after the required process.
- Question cue
- Permission to build versus permission to occupy.
- Terms
- Plan review vs. field inspection
- Difference
- Plan review evaluates submitted design documents. A field inspection checks work at a particular stage against approved plans and applicable requirements.
- Question cue
- Paper design versus installed work.
- Terms
- Code inspection vs. home inspection
- Difference
- A code inspection is an official regulatory check within the AHJ's scope. A private home inspection is a contractual visual assessment whose scope and standard are different.
- Question cue
- Government enforcement versus buyer's private condition review.
- Terms
- Building code vs. property-maintenance code
- Difference
- A building code focuses heavily on construction and alteration. A property-maintenance or housing code commonly addresses ongoing conditions such as sanitation, deterioration, heat, occupancy, and exterior upkeep.
- Question cue
- Construction requirements versus continuing condition duties.
- Terms
- Base energy code vs. stretch energy code
- Difference
- The Illinois Energy Conservation Code is the statewide base. A locally adopted stretch component replaces the base for that component and requires higher energy performance.
- Question cue
- Statewide base versus adopted higher target.
- Terms
- Repair vs. alteration
- Difference
- A repair restores an existing component. An alteration changes a building, system, configuration, or use and can trigger broader requirements. Exact definitions come from the controlling code.
- Question cue
- Restore versus change.
- Terms
- Existing condition vs. code violation
- Difference
- An older condition may lawfully remain under an existing-building provision. A violation is a condition that fails a requirement currently applicable to it.
- Question cue
- Allowed legacy condition versus present noncompliance.
- Terms
- Code minimum vs. construction quality
- Difference
- Code establishes a legal minimum. Contract specifications, manufacturer instructions, professional standards, warranties, and good workmanship can demand more.
- Question cue
- Legal floor versus promised performance.
- Terms
- Certificate of occupancy vs. warranty
- Difference
- A certificate records official occupancy approval for its stated scope and time. A warranty is a contractual promise about condition, performance, or repair responsibility.
- Question cue
- Regulatory approval versus private promise.
The C-O-D-E-S permit-file method
- Control: identify every authority having jurisdiction, including the municipality, county, Capital Development Board, fire authority, plumbing authority, school authority, or other state agency.
- Occupancy and object: classify the building, present and proposed occupancy, construction type, project funding, new or existing status, and exact work proposed.
- Date and documents: find the permit-application date, enacted code edition, local amendments, approved plans, revisions, permits, inspection reports, notices, and occupancy certificate.
- Evaluate each layer: test structural, existing-building, energy, accessibility, plumbing, fire, zoning, property-maintenance, private covenant, and professional-design requirements separately.
- Status and solution: list open permits, failed or missed inspections, violations, unsafe conditions, required corrections, professional reports, approvals, appeals, and closeout steps.
- Stage
- Zoning clearance
- What it answers
- Whether the proposed use and site plan fit land-use rules
- What it does not prove
- That construction details satisfy building code
- Stage
- Building permit
- What it answers
- Whether described work may begin under approved documents
- What it does not prove
- That field work was installed correctly
- Stage
- Required inspections
- What it answers
- Whether observed work passed at listed stages
- What it does not prove
- That concealed or later work outside the inspection complied
- Stage
- Certificate of occupancy
- What it answers
- Whether stated occupancy received official approval
- What it does not prove
- That the property is defect free or all later work was permitted
How do the rules work in scenarios?
A restaurant is allowed by zoning but not ready for occupancy
Scenario: A buyer confirms that restaurant use is permitted in the district. The former retail space lacks the required commercial kitchen exhaust, plumbing fixtures, accessible route, and fire-safety work for the proposed occupancy.
- Zoning answers whether restaurant use is allowed at the location.
- Building and related codes address the construction, systems, life safety, and occupancy conversion.
- The buyer needs code review, permits, work, inspections, and occupancy approval before operating.
Answer: Zoning approval does not substitute for building-code and occupancy compliance.
A local code cannot fall below the structural baseline
Scenario: An Illinois municipality maintains an adopted building code after January 1, 2025. A developer argues that an older local edition can regulate structural design less stringently than the current state baseline for a new commercial building.
- The Capital Development Board Act establishes baseline categories beginning January 1, 2025.
- A locally adopted code must regulate structural design at least as stringently as the applicable baseline.
- The local code and amendments still govern administration and any lawful additional requirements.
Answer: The local structural rules cannot be applied below the applicable state baseline.
No local code does not mean no commercial requirements
Scenario: A substantially improved commercial building is located in an Illinois area that has not adopted a building code. The owner assumes the building can be occupied without any code certification.
- The location can qualify as a non-building-code jurisdiction under state law.
- 20 ILCS 3105/10.09-1 supplies a qualified-inspection and certification path for covered new or substantially improved commercial buildings before occupancy.
- Energy, accessibility, plumbing, and fire layers must also be checked.
Answer: The absence of a local code does not erase the state compliance path.
A permit does not cover undisclosed basement work
Scenario: A permit was issued to replace basement drywall after water damage. The owner also added a bedroom, bathroom, electrical circuits, and walls without revising the plans or requesting rough inspections.
- The permit covers only its stated and approved scope.
- New plumbing, electrical, framing, and occupancy features can require separate review and inspections.
- Closing the drywall can conceal work the inspector was required to see.
Answer: The existence of a drywall permit does not legalize the unapproved conversion.
An old stair is not automatically exempt
Scenario: A 1920 apartment building has a narrow stair. The owner calls it grandfathered without identifying the code, lawful history, alteration work, occupancy, unsafe-condition rules, or any official decision.
- Age by itself does not establish current legal treatment.
- An existing-building provision may allow the stair, require an upgrade after work or occupancy change, or permit enforcement if it is unsafe.
- The AHJ must apply the controlling code and verified history.
Answer: Replace the label grandfathered with a code-specific existing-condition analysis.
The current Illinois energy edition matters
Scenario: A residential permit application is filed in July 2026. The builder's checklist still uses the 2021 Illinois Energy Conservation Code without checking the effective update.
- The Capital Development Board states that the 2024 Illinois Energy Conservation Code took effect November 30, 2025.
- The 2026 permit must be reviewed under the code and transition rules applicable to that filing.
- Local stretch adoption, if any, must also be verified.
Answer: An outdated checklist cannot replace the current Illinois energy-code determination.
A certificate of occupancy does not approve later work
Scenario: A house received a certificate of occupancy in 2004. In 2022 an owner enclosed a porch and installed electrical heating without permits. The seller points only to the 2004 certificate.
- The certificate addressed the approved occupancy and record at its issuance.
- It could not approve work performed 18 years later.
- The transaction file should identify permits, inspections, correction options, disclosures, and professional review for the enclosure.
Answer: The old certificate is not proof that later construction complies.
What are the common exam traps?
- Trap
- Saying Illinois has no statewide building code
- Correction
- Illinois baseline building-code requirements took effect January 1, 2025. Local codes and statewide subject-specific layers still require separate review.
- Trap
- Applying one code edition everywhere
- Correction
- Verify jurisdiction, building category, funding, project type, permit date, local adoption, amendments, and statewide rules.
- Trap
- Treating a model code as enacted law
- Correction
- Find the statute, administrative rule, or adoption ordinance that incorporates the model text and modifies it.
- Trap
- Using zoning approval as code approval
- Correction
- Zoning and building code answer different questions, and a project often needs both.
- Trap
- Using a permit as proof of final compliance
- Correction
- The permitted work must match approved documents, receive required inspections, and complete the closeout process.
- Trap
- Using a certificate of occupancy as a warranty
- Correction
- A certificate is regulatory approval for its stated occupancy and time, not a promise that every condition is defect free.
- Trap
- Calling every old condition grandfathered
- Correction
- Apply the controlling existing-building, unsafe-condition, alteration, occupancy-change, and retroactivity provisions.
- Trap
- Assuming no local code means no code
- Correction
- Illinois statutes create baseline paths in non-building-code jurisdictions, and statewide energy, plumbing, accessibility, and fire rules may apply.
- Trap
- Ignoring local amendments
- Correction
- An adopted model edition may be changed by local provisions, subject to state minimums and limits.
- Trap
- Ignoring the permit-application date
- Correction
- Code transitions commonly turn on when a complete permit application was received or another event defined by law.
- Trap
- Treating a private home inspection as a municipal inspection
- Correction
- The two reviews have different authority, purpose, scope, methods, and consequences.
- Trap
- Assuming a passed inspection checks everything
- Correction
- An inspection covers the observable work and stage within its assigned scope, not every concealed or future condition.
- Trap
- Forgetting occupancy classification
- Correction
- A use conversion can change egress, fire protection, ventilation, plumbing, accessibility, structural, and occupancy requirements.
- Trap
- Letting a broker diagnose technical compliance
- Correction
- Brokers should report known facts and red flags accurately, avoid concealment, and refer code conclusions to the AHJ and qualified professionals.
- Trap
- Calling these official PSI questions
- Correction
- These are original questions aligned to the current public outline and Illinois primary sources.
Can you answer these original practice questions?
These questions are original study items aligned to the published outline. They are not copied, recalled, or predicted PSI questions.
1. What is the main purpose of a building code?
- To establish minimum requirements for covered construction and building safety
- To guarantee luxury workmanship
- To set mortgage rates
- To transfer title
Show answer and explanation
Answer: To establish minimum requirements for covered construction and building safety
Building codes are public controls adopted under police power to protect health, safety, and welfare.
2. Which statement best describes Illinois in 2026?
- Statewide baseline requirements apply, while local codes and amendments can still matter
- No building requirements exist outside Chicago
- One unamended model book governs every project
- Only private covenants control construction
Show answer and explanation
Answer: Statewide baseline requirements apply, while local codes and amendments can still matter
The 2025 baseline did not eliminate local adoption, administration, amendments, or other statewide layers.
3. What does a building permit ordinarily authorize?
- The described work under approved plans and applicable conditions
- Every future alteration on the property
- Any use the owner chooses
- A defect-free building warranty
Show answer and explanation
Answer: The described work under approved plans and applicable conditions
Unlisted work, field changes, and later alterations may require separate review and approval.
4. A new restaurant is allowed in the zoning district. What follows?
- Building, fire, plumbing, accessibility, energy, and occupancy requirements still need review
- No other public approval can apply
- The zoning permit is a construction warranty
- The owner may skip inspections
Show answer and explanation
Answer: Building, fire, plumbing, accessibility, energy, and occupancy requirements still need review
Zoning permission and code compliance are separate layers.
5. What became effective in Illinois on November 30, 2025?
- The 2024 Illinois Energy Conservation Code
- A repeal of all energy standards
- A statewide ban on local permits
- The federal mortgage code
Show answer and explanation
Answer: The 2024 Illinois Energy Conservation Code
The Capital Development Board identifies that date for the 2024 Illinois code based on the 2024 IECC with Illinois amendments.
6. Does a certificate of occupancy prove that later work was permitted?
- No, it addresses the approved occupancy record within its time and scope
- Yes, it approves all future work
- Yes, if the owner kept a copy
- No, because occupancy certificates never matter
Show answer and explanation
Answer: No, it addresses the approved occupancy record within its time and scope
A certificate issued before later construction cannot approve that later work.
7. What should replace a blanket claim that an old feature is grandfathered?
- A code-specific review of lawful history, current use, project scope, and existing-building rules
- The seller's opinion alone
- The building's age alone
- The current asking price
Show answer and explanation
Answer: A code-specific review of lawful history, current use, project scope, and existing-building rules
Existing conditions can be allowed, upgraded, or prohibited depending on the actual law and facts.
8. Who ordinarily interprets a local code for a private project?
- The local authority having jurisdiction
- The listing photographer
- The mortgage servicer
- Any neighbor
Show answer and explanation
Answer: The local authority having jurisdiction
The local building official or responsible authority administers the enacted local code and process.
9. What is true in an Illinois non-building-code jurisdiction?
- State statutory baseline paths and statewide subject-specific codes can still apply
- Every construction rule disappears
- A permit is never needed for any state layer
- Private title restrictions become building codes
Show answer and explanation
Answer: State statutory baseline paths and statewide subject-specific codes can still apply
No locally adopted code is not the same as no law or compliance obligation.
10. What is the best transaction check for a recent addition?
- Compare the actual addition with approved plans, permit scope, inspections, and closeout
- Rely only on fresh paint
- Assume the contractor handled everything
- Check only the tax bill
Show answer and explanation
Answer: Compare the actual addition with approved plans, permit scope, inspections, and closeout
The public file and physical work together reveal whether the approval sequence was completed.
How should you study this area?
- Session
- Session 1
- Focus
- Map the code layers
- Proof you are ready
- Classify 30 rules as structural, existing-building, energy, accessibility, plumbing, fire, zoning, property maintenance, private covenant, or contract quality.
- Session
- Session 2
- Focus
- Build the Illinois timeline
- Proof you are ready
- Explain the January 1, 2025 statewide baseline, November 30, 2025 energy-code update, local adoption role, and non-code-jurisdiction paths without notes.
- Session
- Session 3
- Focus
- Trace permit to occupancy
- Proof you are ready
- Order 24 project events from zoning clearance and plan review through rough inspections, corrections, final inspection, and certificate of occupancy.
- Session
- Session 4
- Focus
- Analyze existing buildings
- Proof you are ready
- Resolve 18 scenarios involving repairs, alterations, additions, unsafe conditions, change of occupancy, unpermitted work, damage, and claimed grandfathering.
- Session
- Session 5
- Focus
- Audit transaction files
- Proof you are ready
- Review ten fictional properties for permit scope, approved plans, inspections, open cases, occupancy approval, later work, disclosures, and expert referrals.
- Session
- Session 6
- Focus
- Run the C-O-D-E-S method
- Proof you are ready
- Score at least 90 percent and explain every miss through control, occupancy and object, date and documents, layers, or status and solution.
Do not count recognition as mastery. Close the notes and explain the rule, apply it to a new fact pattern, and identify why each distractor fails.
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Drill this topic, then review the explanation
Pass Illinois gives you original national and Illinois questions, topic-by-topic study, clear explanations, timed practice, flashcards, progress tracking, and Math Coach. Start free, find the weak distinction, and focus the next session there.
Questions students ask about What Is a Building Code? Illinois Exam Guide
What is a building code?
A building code is an enacted set of minimum requirements for construction, alteration, repair, use, occupancy, and building safety. It can address structural design, fire and life safety, means of egress, plumbing, mechanical systems, electrical work, energy performance, and accessibility. The controlling code is the law adopted for the project, not a model-code book standing alone.
Does Illinois have a statewide building code in 2026?
Illinois has statewide baseline requirements effective January 1, 2025. In jurisdictions with locally adopted codes, those codes must regulate structural design at least as stringently as the statutory baseline for the covered building category. In a non-building-code jurisdiction, state law supplies baseline paths and special inspection or contract rules. Statewide energy, accessibility, plumbing, and fire requirements can also apply. Local codes and amendments still matter.
Is the same building code edition used everywhere in Illinois?
No. A municipality or county may have its own adopted code edition and amendments, subject to applicable state minimums and limits. The answer can also depend on whether the project is residential or commercial, new construction or rehabilitation, privately funded or state funded, and whether the jurisdiction has adopted a code. Verify the current local code record and statewide layers for the exact property and permit date.
What is the Illinois Energy Conservation Code as of August 1, 2026?
The Capital Development Board states that the 2024 Illinois Energy Conservation Code, based on the 2024 International Energy Conservation Code with Illinois amendments, took effect November 30, 2025 for privately funded commercial facilities and residential buildings. It is a statewide layer. A municipality that adopts an applicable Illinois Stretch Energy Code replaces the base energy code with that stricter code for the adopted component.
Is a building code the same as zoning?
No. Zoning controls land use and development location, such as permitted uses, density, setbacks, height, and parking. A building code controls how covered construction and building systems must be designed, installed, altered, and maintained for safety and performance. A project can satisfy zoning but fail building code, or satisfy construction plans but lack zoning approval.
Does a building permit prove the completed work complies?
No. A permit authorizes work under approved plans and applicable conditions. Compliance still depends on construction matching those plans and passing required inspections. Field conditions, revisions, concealed work, missed inspections, expired permits, or unapproved changes can leave an open issue even when a permit was issued.
What does a certificate of occupancy prove?
A certificate of occupancy generally confirms that the authority having jurisdiction approved occupancy for the stated use under its process at that time. It is not a warranty that every component is defect free, that later work was permitted, that zoning will allow a new use, or that no current violation exists. Read the certificate, property file, permits, and current code record together.
Are existing buildings grandfathered from building codes?
Not automatically. Existing-building provisions may allow lawful conditions to remain, while alterations, additions, repairs, unsafe conditions, changes of occupancy, major rehabilitation, damaged structures, or specifically retroactive safety rules can trigger current requirements. The word grandfathered is too broad. Identify the exact code, work, use, date, and exception.
Who interprets and enforces a local Illinois building code?
For a privately funded project in a code jurisdiction, the local authority having jurisdiction ordinarily administers permits, inspections, interpretations, and enforcement. The Illinois Capital Development Board explains that it does not override a local authority's interpretation. State agencies may administer separate statewide rules. The correct contact depends on the project and legal layer.
Where are building codes tested on the Illinois broker exam?
The PSI Illinois Candidate Information Booklet effective June 24, 2026 places building codes within National II.A.2 under government rights in land and public controls. Questions commonly contrast building codes with zoning, private deed restrictions, permits, inspections, certificates of occupancy, police power, legal nonconforming conditions, and buyer due diligence.
Are these official PSI questions or code advice?
No. The practice questions are original, and the sources were checked through August 1, 2026. A real project requires the current enacted local code and amendments, permit history, statewide rules, occupancy classification, project scope, official interpretation, and advice from qualified design, construction, inspection, or legal professionals.
Primary sources
- PSI Illinois Candidate Information Booklet effective June 24, 2026
- Illinois Capital Development Board, current building codes and regulations by project category
- Illinois Capital Development Board, statewide baseline and local authority FAQ
- 20 ILCS 3105, Capital Development Board Act including statewide baseline and local code reporting
- 20 ILCS 3105/10.09-1, commercial buildings in non-building-code jurisdictions
- 815 ILCS 670/15, residential construction contracts in non-building-code jurisdictions
- Illinois Capital Development Board, 2024 Illinois Energy Conservation Code effective November 30, 2025
- 71 Ill. Adm. Code 600, Illinois Energy Codes and current incorporated editions
- Public Act 104-0315, current Illinois Stretch Energy Code milestone amendments
The current official outline controls the tested scope. Statutes, regulations, and official agency materials control when a general study rule and a jurisdiction-specific rule differ.
Editorial status
Checked against primary sources
The Pass Illinois editorial team last checked this guide on August 1, 2026. Every practice question is an original study item, and the source links above let you verify the rules that support the lesson.