- Official section
- National II.B: Zoning and legal nonconforming uses
- 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
Nonconforming use: lawful then, inconsistent now
A busy repair shop in a residential district may be legal, illegal, specially approved, or legally nonconforming. You cannot tell from the activity or age alone. A good analysis rebuilds the timeline: when did the use begin, what law applied then, was every required approval obtained, when did the rule change, how broad was the use, and has anything happened since that caused the right to shrink or end? Nonconforming status lives or dies on that record.
Last updated: August 1, 2026
What does this exam area cover?
Short answer: A legal nonconforming use was lawful when established but no longer complies with later zoning. It may continue only within the protection and limits of the current ordinance and governing law. The owner must prove the use's lawful origin, nature, extent, and continuity. Expansion, substitution, discontinuance, abandonment, structural alteration, destruction, and a return after a conforming use can limit or terminate the status.
This guide follows the PSI Illinois Candidate Information Booklet effective June 24, 2026, current Illinois municipal and county zoning statutes, and published Illinois court opinions checked through August 1, 2026. The Illinois Municipal Code grants zoning power, while detailed nonconforming-use rules are largely local. County section 5-12001 expressly protects existing lawfully devoted uses while permitting defined gradual-elimination provisions. Municipal codes differ on discontinuance periods, intent, expansion, substitution, damage percentages, reconstruction deadlines, registration, certificates, amortization, annexation, and appeals. Always apply the actual ordinance in force at each point in the timeline.
What is on the official outline?
- Topic
- Legal nonconforming definition
- What to know
- Use, building, structure, lot, site feature, sign, lawful establishment, prior ordinance, later zoning change, current noncompliance, continuation, grandfathered, and protected status
- Best exam move
- Choose legal nonconforming only when the condition was lawful before the rule changed.
- Topic
- Lawful inception
- What to know
- Permit, certificate of occupancy, license, zoning approval, building code, historic ordinance, annexation, county rule, municipal rule, owner proof, date, and use scope
- Best exam move
- An old use is not necessarily a lawful use. Establish legality under the law that applied when it began.
- Topic
- Change in regulation
- What to know
- Rezoning, map amendment, text amendment, annexation, new use table, changed setback, reduced height, prohibited use, overlay, effective date, transition, and vested permit
- Best exam move
- Identify the exact legal change that created the mismatch. No change can mean no nonconformity.
- Topic
- Nonconforming use
- What to know
- Activity, occupancy, business type, residential units, industrial operation, retail, parking, outdoor storage, hours, intensity, customers, equipment, and land area
- Best exam move
- Define the protected activity and intensity precisely instead of describing the entire parcel as grandfathered.
- Topic
- Nonconforming structure
- What to know
- Setback, height, coverage, floor area, yard, encroachment, building envelope, lawfully built structure, current bulk rule, alteration, enlargement, removal, and reconstruction
- Best exam move
- A conforming use can occupy a structure with a nonconforming setback. Keep use and structure separate.
- Topic
- Nonconforming lot
- What to know
- Lot of record, width, area, depth, frontage, lawful creation, subdivision, merger, common ownership, buildability, setback, density, single ownership, and local exception
- Best exam move
- An undersized lot may have special buildability rules even when the proposed use itself is permitted.
- Topic
- Nonconforming site feature
- What to know
- Parking, loading, landscape, sign, lighting, access, stormwater, fence, open space, screening, dumpster, drive aisle, and local classification
- Best exam move
- Do not assume a protected principal use excuses every site component from later compliance.
- Topic
- Extent of protected right
- What to know
- Historic floor area, parcel portion, number of units, hours, production level, outdoor area, equipment, customers, deliveries, parking, intensity, accessory activity, and evidence
- Best exam move
- The right usually covers the proven lawful extent, not every future enlargement the owner can imagine.
- Topic
- Continuation
- What to know
- Same use, routine operation, ownership change, tenancy change, ordinary maintenance, repair, license renewal, permit, code compliance, no abandonment, and documentary proof
- Best exam move
- A sale or new tenant does not necessarily end status, but the successor cannot exceed or revive the protected use.
- Topic
- Expansion and enlargement
- What to know
- Additional land, floor area, units, equipment, production, outdoor storage, hours, seats, parking, structural addition, increased intensity, ordinance prohibition, special approval, and variance
- Best exam move
- Distinguish maintaining the historic use from expanding its physical footprint or operational intensity.
- Topic
- Change or substitution
- What to know
- Different nonconforming use, same classification, less intensive, more intensive, conforming use, use table, approval, sequence, no return, and zoning administrator
- Best exam move
- Read the ordinance's substitution ladder. A change to a conforming use can permanently end the old nonconforming option.
- Topic
- Discontinuance
- What to know
- Objective period, vacancy, closure, cessation, seasonal use, intermittent use, permit work, renovation, involuntary interruption, ordinance definition, restart, and proof
- Best exam move
- Count time under the local definition and distinguish mere nonuse from legally defined discontinuance.
- Topic
- Abandonment
- What to know
- Intent, voluntary conduct, relinquishment, removal of equipment, conversion, marketing, demolition, long nonuse, permit history, owner testimony, external evidence, and ordinance language
- Best exam move
- Ask whether the code uses intent, a fixed period, or both. Do not import one community's test into another.
- Topic
- Damage and destruction
- What to know
- Fire, storm, casualty, demolition, percentage of value, percentage of structure, major part, reconstruction deadline, permit, same footprint, current code, insurance, safety, and total loss
- Best exam move
- Use the ordinance's exact threshold and restoration clock, not an insurer's coverage decision.
- Topic
- Repair and alteration
- What to know
- Ordinary maintenance, structural alteration, modernization, life safety, accessibility, code compliance, change in footprint, cost threshold, permit, no increased nonconformity, and official review
- Best exam move
- Maintenance may be allowed while an alteration that increases the nonconformity is not.
- Topic
- County statutory treatment
- What to know
- 55 ILCS 5/5-12001, existing property, lawfully devoted, use, maintenance, gradual elimination, unimproved land, discontinued use, adaptable building, major damage, agriculture, and county limits
- Best exam move
- For county zoning, use the statute's express protection and specified gradual-elimination concepts before applying the local code.
- Topic
- Municipal ordinance treatment
- What to know
- Illinois Municipal Code, local zoning power, home rule, definitions, use, structure, lot, sign, discontinuance, damage, registration, certificate, enforcement, appeal, and judicial review
- Best exam move
- Municipal nonconforming rules are code specific. Find the enacted text and official interpretation.
- Topic
- Certificate and proof
- What to know
- Nonconforming-use certificate, zoning letter, affidavit, historic permit, occupancy, business license, tax file, assessor record, utility bill, lease, aerial photograph, directory, invoice, testimony, and burden
- Best exam move
- Build evidence for lawfulness, date, location, scale, continuity, and current compliance, not just age.
- Topic
- Enforcement and appeal
- What to know
- Notice of violation, cease and desist, zoning administrator, revocation, certificate, board of appeals, 45-day municipal route, stay, hearing, record, due process, circuit court, and deadline
- Best exam move
- Act promptly when an official decision challenges status. Informal negotiations may not pause an appeal period.
- Topic
- Transaction due diligence
- What to know
- Seller representation, buyer intended use, lender, insurer, zoning report, certificate, permits, continuous operation, vacancy, casualty, code case, expansion, conditions, appraisal, title, disclosure, and attorney
- Best exam move
- Do not value a property on nonconforming income until the status, extent, continuity, and transferability are documented.
Which distinctions produce the most mistakes?
- Terms
- Legal nonconforming use vs. illegal use
- Difference
- A legal nonconforming use was lawful when established and became inconsistent after a rule change. An illegal use lacked lawful authorization when created or operated.
- Question cue
- Lawful then versus unlawful from the start.
- Terms
- Nonconforming use vs. variance
- Difference
- Nonconforming status arises from lawful history before a zoning change. A variance is affirmative relief granted through findings in a specific application.
- Question cue
- Grandfathered history versus new relief.
- Terms
- Nonconforming use vs. special use
- Difference
- A nonconforming use is not currently listed as permitted but may continue due to prior lawfulness. A special use is currently contemplated by the ordinance after approval under standards.
- Question cue
- Old protected use versus current conditional use.
- Terms
- Nonconforming use vs. nonconforming structure
- Difference
- A use nonconformity concerns activity. A structure nonconformity concerns physical standards such as setback, height, or coverage.
- Question cue
- What happens there versus how the building sits.
- Terms
- Nonconforming lot vs. nonconforming building
- Difference
- A nonconforming lot fails current area, width, or frontage rules. A nonconforming building fails current physical development standards.
- Question cue
- Parcel geometry versus structure geometry.
- Terms
- Continuation vs. expansion
- Difference
- Continuation maintains the historically protected use and extent. Expansion adds land, floor area, capacity, intensity, units, hours, or another regulated element.
- Question cue
- Same footprint and scale versus more.
- Terms
- Discontinuance vs. abandonment
- Difference
- Discontinuance can be an objective period or event defined by ordinance. Abandonment commonly considers intent and conduct, though local language controls the analysis.
- Question cue
- Code-defined nonuse versus relinquishing intent and acts.
- Terms
- Vacancy vs. loss of status
- Difference
- Vacancy is a factual period without occupancy. Loss of status is the legal consequence only if the ordinance and evidence make vacancy a qualifying discontinuance or abandonment.
- Question cue
- Empty space versus terminated right.
- Terms
- Repair vs. reconstruction
- Difference
- Repair maintains or restores components. Reconstruction may recreate a substantially damaged or removed nonconforming structure and can trigger stricter limits or loss.
- Question cue
- Maintain parts versus rebuild the whole.
- Terms
- Ownership transfer vs. use change
- Difference
- A transfer changes the owner. A use change alters the activity. Ownership alone may not end status, while a switch to another use can.
- Question cue
- Who owns versus what occurs.
- Terms
- Zoning status vs. business license
- Difference
- Zoning status addresses lawful land use. A business license authorizes regulated business activity and may expire annually without proving zoning rights.
- Question cue
- Land-use legality versus operating credential.
- Terms
- Protected zoning status vs. code immunity
- Difference
- Nonconforming status may protect a use or structure from a later zoning rule. It does not generally excuse current fire, health, safety, licensing, environmental, or maintenance duties.
- Question cue
- Zoning continuation versus all-law exemption.
The L-A-W-F-U-L timeline for nonconforming status
- Law at inception: obtain the ordinance, zoning map, permits, occupancy approvals, licenses, and definitions that applied when the use or structure began.
- Activity and extent: document exactly what occurred, where it occurred, its floor area, land area, units, hours, equipment, intensity, and accessory components.
- When the rule changed: locate annexation, map amendment, text amendment, overlay, effective date, and any transition or vested-right provision.
- Following history: build a year-by-year record of owners, tenants, operations, permits, closures, renovations, casualty, code cases, and official determinations.
- Use limits today: apply continuation, expansion, substitution, discontinuance, abandonment, maintenance, damage, reconstruction, registration, and certificate rules.
- Legal process: identify zoning staff, written interpretation, board appeal, evidence, hearing, stay, enforcement, review, and every filing deadline.
- Type
- Use
- What fails the current rule
- Activity conducted on the property
- Example
- Older repair shop in a residential district
- Type
- Structure
- What fails the current rule
- Physical placement or bulk
- Example
- Lawfully built house inside today's side setback
- Type
- Lot
- What fails the current rule
- Parcel area, width, depth, or frontage
- Example
- Recorded 40-foot lot where 60 feet is now required
- Type
- Site feature
- What fails the current rule
- Parking, sign, landscape, access, or screening standard
- Example
- Older parking lot with fewer required spaces
How do the rules work in scenarios?
A lawful shop survives rezoning
Scenario: A repair shop opened with all required approvals in 1995. In 2026 the village rezones the parcel residential, and its ordinance permits lawful existing uses to continue without expansion.
- The shop was lawful before the map change.
- The 2026 rezoning created the current mismatch.
- The shop may continue within its proven 1995-to-2026 scope, subject to the ordinance's limits and other current safety laws.
Answer: The shop is a legal nonconforming use, not an illegal use created by the rezoning.
An old illegal unit remains illegal
Scenario: An owner divided a house into three apartments in 2008 without required zoning or building approval. The district allowed only one dwelling then and still does today.
- Age alone does not create legality.
- The three-unit use was not lawful when established.
- No later zoning change created a protected status on these facts.
Answer: The extra units are not legal nonconforming merely because they have existed for years.
Use conforms, structure does not
Scenario: A single-family house is permitted in its district, but the house was lawfully built five feet from the side line before the setback increased to ten feet.
- The residential activity remains a conforming use.
- The building placement fails the newer dimensional rule.
- The protected condition is a nonconforming structure or building element, not a nonconforming residential use.
Answer: Classify the setback as a structural nonconformity.
Expansion beyond historic land area
Scenario: A legal nonconforming outdoor-storage yard historically occupied one acre. The owner purchases the adjoining acre and moves storage onto it without approval.
- The protected extent is supported only for the original acre.
- Using new land enlarges the physical scope of the nonconforming activity.
- A typical prohibition on expansion would bar the second acre unless a lawful approval path applies.
Answer: The original use may remain protected, but the adjoining-acre expansion is not automatically grandfathered.
Temporary vacancy during repairs
Scenario: A lawful two-unit building becomes vacant after a pipe failure. The owner promptly obtains permits and continuously works on repairs, but no tenants occupy it for 14 months. The ordinance refers separately to discontinuance and intent.
- Vacancy length is relevant but not necessarily decisive without the ordinance's definition.
- Permits, construction progress, insurance records, and consistent owner conduct can show an intent to resume.
- The official decision must apply the actual discontinuance and abandonment language to the complete record.
Answer: Do not declare the status lost or preserved from vacancy alone.
A conforming conversion can end the old use
Scenario: An ordinance says a nonconforming use changed to a conforming use may not later return. An old factory is legally converted to apartments, and a later buyer wants factory operations again.
- The apartment conversion made the property conforming under the supplied rule.
- The ordinance bars restoration of the former nonconforming factory use.
- The buyer needs a current zoning approval route rather than relying on historic factory activity.
Answer: The old factory use cannot be revived as nonconforming under the supplied ordinance.
Major damage triggers the local threshold
Scenario: A nonconforming commercial building is severely damaged by fire. The ordinance allows restoration only when damage is below 50 percent of replacement cost and work begins within six months.
- The zoning threshold is the ordinance's defined replacement-cost measure, not the insurance payout.
- A qualified cost analysis and official determination are needed.
- Even if below the threshold, the owner must meet the six-month start rule and current safety-code requirements.
Answer: Apply both the damage threshold and reconstruction deadline before assuming the building can be restored as before.
What are the common exam traps?
- Trap
- Calling every old use grandfathered
- Correction
- The use must have been lawful when established and must have retained status under later rules.
- Trap
- Letting years of illegal operation create legality
- Correction
- Delay in enforcement does not automatically transform an illegal use into a legal nonconforming use.
- Trap
- Using nonconforming use and variance as synonyms
- Correction
- One arises from lawful history; the other is new relief granted through findings.
- Trap
- Calling a setback problem a use problem
- Correction
- Separate the activity from the structure, lot, sign, parking, or other physical nonconformity.
- Trap
- Protecting the entire parcel without defining scope
- Correction
- Prove the historic area, floor space, units, hours, equipment, intensity, and accessory uses.
- Trap
- Assuming sale ends the use
- Correction
- Ownership change alone may not terminate status, though the buyer receives only the right that still exists.
- Trap
- Assuming sale revives a lost use
- Correction
- A buyer cannot restore a status already ended by discontinuance, abandonment, conversion, destruction, or another code event.
- Trap
- Treating maintenance as expansion
- Correction
- Read the ordinance. Ordinary repair can be allowed even when additions or increased intensity are barred.
- Trap
- Treating every renovation as maintenance
- Correction
- Structural alteration, footprint growth, new units, or increased use can exceed protected maintenance.
- Trap
- Declaring abandonment from vacancy alone
- Correction
- Apply the ordinance's discontinuance period, intent standard, exceptions, and evidence.
- Trap
- Letting intent defeat an objective discontinuance rule automatically
- Correction
- Some local ordinances attach consequences to a defined period or event. The enacted text controls.
- Trap
- Using insurance value as the zoning damage test
- Correction
- Apply the ordinance's defined measure, percentage, official determination, and reconstruction deadline.
- Trap
- Assuming zoning status excuses safety codes
- Correction
- Nonconforming protection does not generally immunize current fire, health, building, environmental, or licensing violations.
- Trap
- Ignoring appeal deadlines
- Correction
- A revocation or interpretation may trigger a short administrative clock even while the owner gathers historical proof.
- Trap
- Calling these official PSI questions
- Correction
- These are original items 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 a legal nonconforming use?
- A use lawful when established that later ceased to conform after a zoning change
- Any old use with no permits
- A newly granted variance
- An unpaid property tax
Show answer and explanation
Answer: A use lawful when established that later ceased to conform after a zoning change
Lawful origin and a later regulatory change are the essential starting facts.
2. A prohibited apartment has operated illegally for 15 years. Is it automatically legal nonconforming?
- No, passage of time alone does not establish lawful inception
- Yes, after one year
- Yes, if rent was paid
- No, because no use can ever be nonconforming
Show answer and explanation
Answer: No, passage of time alone does not establish lawful inception
The owner needs evidence that the use complied when it was established.
3. A permitted house sits inside today's setback but was lawfully built before the setback changed. What is nonconforming?
- The structure's setback
- The residential use
- The mortgage
- The property tax
Show answer and explanation
Answer: The structure's setback
The use still conforms, while the physical placement does not.
4. What is the best evidence that a use was lawful when established?
- Contemporaneous permits, occupancy approvals, licenses, and the ordinance then in force
- A recent listing description
- A neighbor's guess
- The age of the roof
Show answer and explanation
Answer: Contemporaneous permits, occupancy approvals, licenses, and the ordinance then in force
Historical official records link the actual use to the law and approvals of the time.
5. A nonconforming shop adds a second building on newly purchased land. What issue is most direct?
- Expansion of the nonconforming use
- Escheat
- Property-tax equalization
- Mortgage amortization
Show answer and explanation
Answer: Expansion of the nonconforming use
The owner seeks more land and building area beyond the proven historical extent.
6. Does temporary vacancy always terminate nonconforming status?
- No, the ordinance and evidence of discontinuance or abandonment control
- Yes, after one day
- Yes, if the property is listed for sale
- No, status can never be lost
Show answer and explanation
Answer: No, the ordinance and evidence of discontinuance or abandonment control
Local rules differ on periods, intent, involuntary interruption, repairs, and other facts.
7. A local code says changing a nonconforming use to a conforming use ends the old right. What happens after a lawful conversion?
- The former nonconforming use cannot be revived under that rule
- The owner may switch back at any time
- The zoning district disappears
- The property escheats
Show answer and explanation
Answer: The former nonconforming use cannot be revived under that rule
The supplied ordinance makes the conforming conversion a terminating event.
8. Which figure controls whether fire damage exceeds a local zoning threshold?
- The measure defined by the zoning ordinance and official determination
- Always the insurance payout
- Always the mortgage balance
- Always the owner's asking price
Show answer and explanation
Answer: The measure defined by the zoning ordinance and official determination
Codes can use value, replacement cost, area, structural percentage, or other defined measures.
9. Does nonconforming status excuse a dangerous electrical violation?
- No, current safety-code duties can still apply
- Yes, every old building is exempt
- Yes, if the use is profitable
- No, because zoning always transfers title
Show answer and explanation
Answer: No, current safety-code duties can still apply
Zoning continuation is not blanket immunity from health, safety, building, fire, or environmental law.
10. What should a broker verify before marketing income from a nonconforming use?
- Lawful origin, extent, continuity, current ordinance, permits, conditions, and enforcement history
- Only the current rent roll
- Only the property's age
- Only the seller's oral statement
Show answer and explanation
Answer: Lawful origin, extent, continuity, current ordinance, permits, conditions, and enforcement history
The income's sustainability depends on the actual legal status and scope.
How should you study this area?
- Session
- Session 1
- Focus
- Classify the nonconformity
- Proof you are ready
- Sort 28 examples into conforming use, nonconforming use, structure, lot, site feature, illegal use, variance, or special use.
- Session
- Session 2
- Focus
- Rebuild lawful inception
- Proof you are ready
- For ten properties, identify the historic ordinance, zoning map, permit, occupancy, license, actual activity, extent, and date needed to prove initial legality.
- Session
- Session 3
- Focus
- Measure protected extent
- Proof you are ready
- Diagram 12 uses by parcel area, floor area, units, hours, equipment, customers, outdoor storage, signs, parking, and accessory components.
- Session
- Session 4
- Focus
- Test events that can end status
- Proof you are ready
- Analyze 20 fact patterns involving expansion, substitution, conforming conversion, discontinuance, intent, vacancy, demolition, fire, repair, reconstruction, and missed deadlines.
- Session
- Session 5
- Focus
- Audit the transaction file
- Proof you are ready
- Review eight sales for zoning letters, certificates, permits, leases, vacancy, casualty, violations, lender conditions, seller disclosures, and buyer plans.
- Session
- Session 6
- Focus
- Run the L-A-W-F-U-L timeline
- Proof you are ready
- Score at least 90 percent and explain every miss through prior law, activity, rule change, history, current limits, or legal process.
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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Questions students ask about What Is a Nonconforming Use? Illinois Exam Guide
What is a legal nonconforming use?
A legal nonconforming use is a land or building use that was lawful when established but no longer conforms after a zoning ordinance or map changes. It is often called grandfathered, but its continuation, expansion, change, repair, and loss are governed by the current ordinance and evidence of lawful history.
Does an illegal use become legal nonconforming over time?
No. The use must have been lawful when it began or when the relevant regulation first applied. An unpermitted or prohibited use does not gain protected status merely because officials did not notice it for years.
Is a nonconforming use the same as a variance?
No. Nonconforming status protects a qualifying existing condition that predates the current rule. A variance is new, property-specific relief granted through an application and findings. One arises from lawful history; the other arises from an approval decision.
Can a legal nonconforming use be expanded?
Only as the governing ordinance and law permit. Many ordinances restrict enlargement, extension to new land or floor area, increased intensity, or structural alteration. Ordinary maintenance may be allowed while expansion is not. Read the exact provision and approval history.
Can a nonconforming use be changed to another use?
The local ordinance controls. Some codes permit a change to a conforming use, a less intensive nonconforming use, or another use within a stated classification after approval. Returning from a conforming use to the old nonconforming use may be prohibited.
What is abandonment of a nonconforming use?
Abandonment traditionally focuses on intent plus conduct showing relinquishment, while a local ordinance may separately define discontinuance by a stated period or other objective event. Do not assume temporary vacancy always destroys the right or that intent always saves it. Read the current ordinance and Illinois cases applying that language.
What happens after fire or major damage?
The ordinance may allow restoration below a damage threshold or within a deadline, while requiring conformity or ending the right after major destruction. Insurance treatment, building code, permits, structural reports, demolition, and the cause and extent of damage do not substitute for the zoning rule.
Does nonconforming use status transfer to a buyer?
A valid land-use status is usually associated with the property and lawful use rather than the identity of one owner, but a buyer must verify the ordinance, certificate, permits, continuous history, conditions, and any pending enforcement. A sale does not revive a status already lost.
What proves a legal nonconforming use?
Strong proof can include dated permits, occupancy records, licenses, zoning certificates, tax and assessor records, leases, utility records, photographs, directories, invoices, sworn testimony, historic maps, and prior official determinations. The evidence must show the correct use, extent, location, lawfulness, and continuity.
Where are nonconforming uses tested on the Illinois broker exam?
The PSI Illinois Candidate Information Booklet effective June 24, 2026 places planning and zoning under National II.A.2. Legal nonconforming uses are commonly tested with police power, variances, special uses, rezoning, building codes, and title or transaction due diligence.
Are these official PSI questions or a zoning opinion?
No. The questions are original, and the sources were reviewed through August 1, 2026. A real status decision requires the current local ordinance, zoning map, historical regulations, official file, permits, evidence of use, and advice from qualified Illinois land-use counsel.
Primary sources
- PSI Illinois Candidate Information Booklet effective June 24, 2026
- 65 ILCS 5/11-13-1, Illinois municipal zoning purposes and powers
- 55 ILCS 5/5-12001, county treatment of existing lawful uses and gradual elimination
- 65 ILCS 5/11-13-12, municipal administrative zoning appeal and 45-day period
- 65 ILCS 5/11-13-25, due process and review of listed municipal zoning decisions
- Conaghan v. City of Harvard, 2016 IL App (2d) 151034, ordinance-based discontinuance analysis
- Adams v. Village of Western Springs, Illinois appellate opinion on lawful inception and annexation
- FLM Enterprises, LLC v. Peoria County Zoning Board of Appeals, Illinois appellate review of certificate revocation
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.