- Official section
- National III: Valuation
- Broker weight
- 8% of the national broker portion
- Expected scored items
- Valuation accounts for about 8 of 100 items
Valuation topic guide
Value principles and highest and best use
Value is not a feature count. It is the market's reaction to benefits, alternatives, timing, risk, location, and legal possibility. Highest and best use organizes those forces into four tests before an appraiser applies an approach.
What does this exam area cover?
Short answer: Know price, cost, market value, investment value and other value types, demand, utility, scarcity, transferability, supply and demand, substitution, anticipation, contribution, conformity, progression, regression, competition, change, balance, increasing and decreasing returns, assemblage and plottage, externalities, four highest-and-best-use tests, analysis as vacant and as improved, interim use, consistent use, excess land, and surplus land.
The current national outline tests economic principles, property characteristics affecting value, and highest and best use. The exact value definition and appraisal assignment control. Exam questions use simplified facts, while actual analysis requires market evidence and qualified professional judgment.
Practice the topic in Pass Illinois
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What is on the official outline?
- Topic
- Price, cost, and value
- What to know
- Sale price, asking price, contract price, acquisition cost, construction cost, direct cost, indirect cost, market value, investment value, use value, assessed value, insurable value, liquidation value, and value premise
- Best exam move
- Name the measure before comparing numbers; one is not proof of another.
- Topic
- Demand
- What to know
- Desire, purchasing power, financing access, household formation, employment, income, population, investor expectations, absorption, buyer pool, preferences, and effective demand
- Best exam move
- Desire without ability to pay is not effective market demand.
- Topic
- Utility, scarcity, and transferability
- What to know
- Usefulness, functional utility, legal utility, site utility, supply limitation, alternative sites, marketable rights, title, access, liquidity, restrictions, and transaction costs
- Best exam move
- Use DUST as a checklist, not as a formula.
- Topic
- Supply and demand
- What to know
- Inventory, listings, construction pipeline, absorption, vacancy, household growth, employment, financing, rent, price, equilibrium, shortage, surplus, elasticity, and market cycle
- Best exam move
- Holding other factors constant, stronger demand or tighter supply supports price pressure.
- Topic
- Substitution
- What to know
- Competing property, equal desirability, price ceiling, replacement alternative, construction alternative, rent alternative, delay, transaction cost, adjustment, capitalization rate, and buyer comparison
- Best exam move
- Ask what an informed buyer could obtain instead.
- Topic
- Anticipation
- What to know
- Future benefits, income, occupancy, expenses, growth, decline, resale, redevelopment, neighborhood change, infrastructure, risk, timing, discounting, and present worth
- Best exam move
- Current value reflects expected future benefits, not only past performance.
- Topic
- Contribution and balance
- What to know
- Marginal value, cost versus contribution, addition, renovation, amenity, overimprovement, underimprovement, land-to-building ratio, production factors, equilibrium, increasing returns, and decreasing returns
- Best exam move
- Stop adding improvements when added cost exceeds added value.
- Topic
- Conformity, progression, and regression
- What to know
- Neighborhood consistency, design, size, quality, use, market expectations, progression of lesser property, regression of superior property, overbuilding, underbuilding, and buyer reaction
- Best exam move
- A property tends to benefit from compatible surroundings and can be limited by inferior neighbors.
- Topic
- Competition, change, and externalities
- What to know
- Excess profit, new supply, rent pressure, market entry, economic change, social change, government change, environmental change, positive externality, negative externality, nuisance, view, transit, noise, and contamination
- Best exam move
- An outside influence can affect value without being located on the property.
- Topic
- Assemblage and plottage
- What to know
- Combining parcels, unified ownership, larger site, improved utility, assemblage cost, holdout, zoning, access, demolition, timing, feasibility, plottage increment, and highest and best use
- Best exam move
- Assemblage is the act; plottage is the possible value increase.
- Topic
- Highest and best use tests
- What to know
- Reasonably probable use, legal permissibility, zoning, private restrictions, permits, physical possibility, size, shape, topography, utilities, financial feasibility, market demand, return, maximal productivity, and risk
- Best exam move
- Test legal and physical possibility before financial feasibility and maximum productivity.
- Topic
- As vacant and as improved
- What to know
- Vacant-site analysis, existing improvement, current use, renovation, conversion, expansion, demolition, interim use, consistent use, excess land, surplus land, feasibility, timing, cost, salvage, and contribution
- Best exam move
- The existing use can remain even when a different future land use appears better if conversion is not currently feasible.
Which distinctions produce the most mistakes?
- Terms
- Price vs. value
- Difference
- Price is a transaction amount. Value is an opinion under stated conditions and can differ from price.
- Question cue
- What was paid versus what is concluded.
- Terms
- Cost vs. contribution
- Difference
- Cost is the expenditure for an item. Contribution is the item's effect on total property value.
- Question cue
- Receipt amount versus market reaction.
- Terms
- Market value vs. investment value
- Difference
- Market value applies a stated market-based definition. Investment value reflects benefits to a particular investor with specific requirements.
- Question cue
- Typical market participants versus named investor.
- Terms
- Progression vs. regression
- Difference
- Progression can lift a lesser property among superior properties. Regression can restrain a superior property among inferior properties.
- Question cue
- Lower property pulled up versus higher property pulled down.
- Terms
- Assemblage vs. plottage
- Difference
- Assemblage combines parcels. Plottage is any added value created by the combined site's greater utility.
- Question cue
- Action versus value increment.
- Terms
- External vs. functional influence
- Difference
- An external influence originates beyond the property boundary. A functional influence arises from the property's own layout, design, or utility.
- Question cue
- Neighboring railroad versus obsolete floor plan.
- Terms
- Legally permissible vs. physically possible
- Difference
- Legal permissibility concerns zoning, restrictions, permits, and law. Physical possibility concerns site size, shape, access, utilities, soil, and construction feasibility.
- Question cue
- May be approved versus can fit and function.
- Terms
- Financially feasible vs. maximally productive
- Difference
- A feasible use provides an adequate positive return. The maximally productive use offers the highest supported value among feasible alternatives.
- Question cue
- Works economically versus works best.
- Terms
- Excess vs. surplus land
- Difference
- Excess land can generally be separated and independently used or sold. Surplus land lacks that independent current use.
- Question cue
- Separate value versus no standalone use.
How should you solve a value-principle question?
- Identify whether the question concerns price, cost, market value, investment value, assessed value, or another defined measure.
- Name the market force: demand, utility, scarcity, transferability, supply, alternatives, future benefits, contribution, conformity, competition, change, or externality.
- For an improvement, compare its marginal value contribution with its marginal cost.
- For a location fact, decide whether the effect is internal to the property or an external influence.
- For highest and best use, list credible alternatives and test legal permissibility and physical possibility first.
- Test the surviving uses for financial feasibility, then identify the maximally productive one with market support.
- Analyze the site as vacant and the property as improved, including transition time, cost, interim use, and excess or surplus land.
- Test
- Legally permissible
- Core question
- Is the use allowed or reasonably probable?
- Typical evidence
- Zoning, covenants, permits
- Test
- Physically possible
- Core question
- Can the site support it?
- Typical evidence
- Size, shape, access, utilities
- Test
- Financially feasible
- Core question
- Does it produce adequate return?
- Typical evidence
- Costs, revenue, demand, risk
- Test
- Maximally productive
- Core question
- Which feasible use creates greatest value?
- Typical evidence
- Comparative residual value
- Test
- As vacant
- Core question
- What should the site support?
- Typical evidence
- Land-use alternatives
- Test
- As improved
- Core question
- Keep, modify, convert, or remove?
- Typical evidence
- Improvement contribution and cost
How do the rules work in scenarios?
Contribution below cost
Scenario: A luxury outdoor kitchen costs $90,000, but paired-sale evidence shows buyers in the subject market pay only about $35,000 more for comparable homes with that feature.
- Cost measures the expenditure.
- Contribution measures the market value effect.
- The market-supported contribution is below cost.
Answer: The improvement contributes about $35,000 under the stated evidence, not its $90,000 cost.
Substitution ceiling
Scenario: Two equally desirable, immediately available homes offer the same utility. One is priced at $420,000 and the other at $465,000 with no offsetting advantage.
- The homes are equally desirable substitutes.
- No delay or material difference supports the higher amount.
- An informed buyer has a lower-priced alternative.
Answer: Substitution places strong downward pressure on the $465,000 property's value.
Highest and best use sequence
Scenario: A small parcel is zoned residential. A warehouse would be profitable but cannot fit safely and industrial rezoning is unsupported.
- The warehouse fails legal permissibility.
- It also fails physical possibility.
- Profitability cannot rescue a use that fails earlier tests.
Answer: The warehouse is not the highest and best use despite its hypothetical profit.
Interim parking use
Scenario: A downtown site is expected to support an office tower after demand recovers in five years. For now, development costs exceed supported value and the site operates profitably as parking.
- Office development is not currently financially feasible.
- Parking produces temporary income.
- The expected transition and holding period affect present value.
Answer: Parking can be an interim use until future redevelopment becomes financially feasible.
What are the common exam traps?
- Trap
- Sale price always equals market value.
- Correction
- Unusual motivation, terms, timing, or information can make price differ from value.
- Trap
- Improvement cost always adds equal value.
- Correction
- Contribution depends on market demand and the property's balance.
- Trap
- Demand means desire alone.
- Correction
- Effective demand includes desire and purchasing power.
- Trap
- Substitution applies only to the sales comparison approach.
- Correction
- It supports comparison, replacement-cost logic, and income alternatives.
- Trap
- Conformity means every property must be identical.
- Correction
- Compatibility with market expectations matters, not exact sameness.
- Trap
- An outside nuisance is functional obsolescence.
- Correction
- A negative influence beyond the property is external.
- Trap
- Any legally allowed use is highest and best.
- Correction
- It must also be physically possible, financially feasible, and maximally productive.
- Trap
- The most profitable imagined use wins.
- Correction
- The use must be reasonably probable and supported by legal, physical, market, cost, and timing evidence.
- Trap
- As-vacant and as-improved analyses always match.
- Correction
- Existing improvements, conversion costs, timing, and contribution can support a different current conclusion.
- Trap
- Excess and surplus land are synonyms.
- Correction
- Excess land has independent use or sale potential; surplus land does not under current facts.
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. Which term describes what a buyer actually paid?
- Value
- Price
- Contribution
- Utility
Show answer and explanation
Answer: B
Price is the transaction amount; value is an opinion.
2. What does the principle of contribution measure?
- The installation invoice only
- The feature's effect on total property value
- The property's tax rate
- The broker's commission
Show answer and explanation
Answer: B
Contribution is the marginal value effect, which can differ from cost.
3. A superior home is surrounded by much smaller, lower-quality homes. Which principle is most relevant?
- Regression
- Progression
- Escheat
- Reconciliation
Show answer and explanation
Answer: A
Inferior surrounding properties can restrain the superior property's value through regression.
4. Which highest-and-best-use test asks whether a proposed building can fit the site?
- Legally permissible
- Physically possible
- Financially feasible
- Maximally productive
Show answer and explanation
Answer: B
Size, shape, access, soil, utilities, and design feasibility belong to physical possibility.
5. Land not needed by the existing improvement can be separately sold and developed. What is it?
- Surplus land
- Excess land
- Personal property
- Trade fixture
Show answer and explanation
Answer: B
Independent sale and development potential distinguish excess land from surplus land.
How should you study this area?
- Session
- 1. Value vocabulary
- Focus
- Price, cost, market value, investment value, use value, assessed value, insurable value, and liquidation value
- Proof you are ready
- Identify the measure in twelve short scenarios.
- Session
- 2. DUST and markets
- Focus
- Demand, utility, scarcity, transferability, supply, absorption, vacancy, financing, and market cycles
- Proof you are ready
- Explain the value direction in eight market changes.
- Session
- 3. Core principles
- Focus
- Substitution, anticipation, contribution, balance, increasing returns, and decreasing returns
- Proof you are ready
- Match ten facts to the strongest principle.
- Session
- 4. Location and change
- Focus
- Conformity, progression, regression, competition, change, externalities, assemblage, and plottage
- Proof you are ready
- Classify twelve internal and external value effects.
- Session
- 5. Highest and best use
- Focus
- Legal, physical, feasible, productive, reasonably probable, market-supported, and sequential testing
- Proof you are ready
- Eliminate alternatives in six four-test grids.
- Session
- 6. Property as improved
- Focus
- Vacant, improved, keep, renovate, convert, demolish, interim use, consistent use, excess land, and surplus land
- Proof you are ready
- Score at least 90% and defend each conclusion with evidence.
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.
Value Principles and Highest and Best Use FAQ
What is the difference between price, cost, and value?
Price is an amount paid, offered, or asked in a transaction. Cost is an expenditure to create or acquire something. Value is an opinion under a defined type of value, property interest, effective date, intended use, and market conditions.
What does DUST mean in real estate valuation?
DUST is a study mnemonic for demand, utility, scarcity, and transferability. A property must offer useful benefits, have buyers with desire and purchasing power, be sufficiently scarce, and have transferable rights to support market value.
What is the principle of substitution?
A rational buyer will not usually pay more for a property than the cost or price of an equally desirable substitute available without unreasonable delay. This principle supports all three approaches to value.
What is the principle of contribution?
Contribution measures an item's effect on total property value, not its installation cost. A $50,000 improvement can add less than, equal to, or more than $50,000 depending on market reaction.
What is the principle of anticipation?
Value reflects the present worth of benefits a buyer expects to receive in the future. Income property values depend heavily on expected income, expenses, risk, resale, and timing.
What is highest and best use?
It is the reasonably probable use that is legally permissible, physically possible, financially feasible, and maximally productive under the assignment's value framework. The use must pass all four tests.
Why analyze highest and best use as vacant and as improved?
As-vacant analysis identifies the best land use assuming the site is available. As-improved analysis asks whether the existing improvement should remain, be modified, converted, or removed based on its contribution and the costs and timing of change.
What is an interim use?
An interim use is a temporary productive use until a different future highest and best use becomes feasible. The timing and cost of transition affect present value.
What is the difference between excess land and surplus land?
Excess land is not needed for the existing improvement and can generally be separated and used or sold independently. Surplus land is not currently needed but cannot be separately developed or sold on its own under the facts.
Are these questions copied from PSI?
No. Every practice item is original and aligned to the public valuation outline.
Primary sources
- PSI Illinois Candidate Information Booklet dated June 24, 2026
- Illinois Department of Financial and Professional Regulation, real estate appraisal
- The Appraisal Foundation, Uniform Standards of Professional Appraisal Practice
- U.S. Department of Justice, Uniform Appraisal Standards for Federal Land Acquisitions
- Cornell Legal Information Institute, fair market value
- Federal Deposit Insurance Corporation, appraisal and evaluation guidance
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.