1. Market Value vs. Market Price vs. Cost

Understanding the distinction between these three terms is fundamental to real estate valuation. Market value is the most probable price a property should bring in a competitive and open market under all conditions requisite to a fair sale. It assumes a willing buyer and willing seller, neither under duress, both reasonably informed, and the property exposed to the market for a reasonable time.

Market price is the actual price at which a property sells โ€” what the buyer actually paid. Market price may differ from market value if the sale was not arm's-length (e.g., family transaction, foreclosure, distress sale). Cost refers to the total expenditure to build or acquire improvements โ€” the dollars spent on labor, materials, and services. Cost does not necessarily equal value; a property might cost $500,000 to build but only be worth $400,000 in the current market.

The exam frequently asks: "An appraiser is determining market value. Which of the following is the appraiser estimating?" The answer is the most probable price, not the sale price, cost, or assessed value.

๐Ÿง  Key Distinction

Market value = what a property should sell for (appraiser's opinion). Market price = what it did sell for (historical fact). Cost = what it took to build (construction expenditure). Assessed value = value assigned by the tax assessor for taxation purposes.

2. The Three Approaches to Value

Sales Comparison Approach

The sales comparison approach (also called the market data approach) is the most widely used and reliable method for appraising single-family residences. The appraiser identifies recently sold comparable properties (comps), adjusts the sale prices for differences (location, size, age, condition, amenities), and arrives at an indicated value for the subject property.

Adjustments follow this principle: if the comparable is superior to the subject, subtract from the comparable's sale price. If the comparable is inferior, add to the comparable's sale price. The acronym CIA (Comparable is Inferior, Add) or SBS (Subject Better, Subtract from comparable) helps remember the direction of adjustments.

Cost Approach

The cost approach is most applicable for new construction, special-purpose properties (churches, schools, fire stations), and properties where comparable sales data is scarce. The formula is:

Replacement Cost New โˆ’ Depreciation + Land Value = Property Value

Replacement cost is the cost to build a structure with similar utility using modern materials and methods. Reproduction cost is the cost to build an exact replica. For appraisal purposes, replacement cost is more commonly used.

There are three methods to estimate cost: comparative-unit method (cost per square foot), unit-in-place method (cost of each component installed), and quantity survey method (detailed breakdown of every material and labor item โ€” most accurate but most expensive).

Income Approach

The income approach (income capitalization approach) is used primarily for income-producing properties such as apartment buildings, office buildings, and shopping centers. It converts the property's expected income stream into a present value estimate.

The formula uses the Gross Rent Multiplier (GRM) for residential properties and the capitalization rate (cap rate) for commercial properties. GRM = Sale Price รท Monthly Gross Rent. Cap Rate = Net Operating Income (NOI) รท Property Value. On the exam, you may be given a GRM and monthly rent, and asked to estimate the property value: Property Value = Monthly Rent ร— GRM.

๐Ÿ“ GRM Calculation Example

A comparable property sold for $240,000 and generates $2,000/month in gross rent. GRM = $240,000 รท $2,000 = 120. If the subject property generates $1,800/month and the GRM is 120, the estimated value = $1,800 ร— 120 = $216,000.

3. Depreciation: The Three Types

Depreciation in appraisal is the loss in value from any cause. It is classified into three categories:

Physical Deterioration โ€” wear and tear from use, age, and the elements. It can be curable (economically feasible to repair, such as repainting or replacing worn carpet) or incurable (cost of repair exceeds the value added, such as a worn foundation).

Functional Obsolescence โ€” loss in value due to outdated design, layout, or features. Examples include a one-bathroom home in a market expecting two or more, an outdated floor plan, or inadequate electrical systems. Functional obsolescence is curable if the cost to fix is less than the value added; incurable if not.

External (Economic) Obsolescence โ€” loss in value from factors outside the property boundaries. Examples include proximity to a landfill, airport noise, a declining neighborhood, or zoning changes. External obsolescence is always incurable because the property owner cannot control external conditions.

TypeDefinitionCurable?Example
Physical DeteriorationWear and tear / agingSometimesPeeling paint, leaky roof
Functional ObsolescencePoor design or layoutSometimesOne bathroom, low ceilings
External ObsolescenceOutside factorsNeverAdjacent landfill, high-crime area

4. Forces Influencing Value

Four broad categories of forces affect property values, often remembered by the acronym PEGS:

Physical/Environmental โ€” location, topography, soil, climate, utilities, access to transportation, and natural amenities. Economic โ€” employment levels, income levels, interest rates, availability of credit, and supply/demand dynamics. Governmental/Political โ€” zoning, building codes, property taxes, rent control, and environmental regulations. Social โ€” population trends, demographic shifts, family size changes, lifestyle preferences, and neighborhood desirability.

The exam may ask which force is at work in a given scenario: a factory closing and laying off 2,000 workers is an economic force; a city rezoning residential land to commercial is a governmental force; an aging population downsizing from large homes is a social force.

5. Principles of Value

Several economic principles guide appraisal practice. Highest and Best Use โ€” the use that produces the greatest net return over time, and that is legally permissible, physically possible, financially feasible, and maximally productive. Conformity โ€” maximum value is achieved when properties in a neighborhood are reasonably similar. Progression โ€” the value of a lesser property is enhanced by proximity to better properties. Regression โ€” the value of a superior property is diminished by proximity to lesser properties. Substitution โ€” a buyer will not pay more for a property than the cost of an equally desirable substitute.

๐Ÿ“– Key Terms

  • Market Value โ€” Most probable price in arm's-length transaction
  • Market Price โ€” Actual sale price of a property
  • Sales Comparison Approach โ€” Value based on comparable sales
  • Cost Approach โ€” Replacement cost minus depreciation plus land
  • Income Approach โ€” Value based on income stream (GRM or cap rate)
  • Gross Rent Multiplier (GRM) โ€” Sale price รท monthly gross rent
  • Capitalization Rate โ€” NOI รท property value
  • Physical Deterioration โ€” Wear and tear from age and use
  • Functional Obsolescence โ€” Loss from outdated design
  • External Obsolescence โ€” Loss from outside factors (always incurable)
  • Highest and Best Use โ€” Most profitable legal use
  • Substitution โ€” Buyer won't pay more than cost of substitute

๐Ÿ“ Practice Questions

1. An appraiser is valuing a 20-year-old single-family home in a residential subdivision. Which approach to value is the appraiser MOST likely to rely on?
Correct Answer: Sales Comparison Approach (Market Data Approach).
The sales comparison approach is the most reliable and commonly used method for appraising single-family homes, especially in subdivisions where there are many recent comparable sales. The cost approach is secondary for older homes, and the income approach is not used for owner-occupied residences.
2. A home is located next to a newly constructed landfill. This loss in value is classified as what type of depreciation?
Correct Answer: External obsolescence (economic obsolescence).
Proximity to an undesirable land use like a landfill is an external factor outside the property boundaries. External (economic) obsolescence is caused by factors external to the property and is always incurable โ€” the property owner cannot control the landfill's location.
3. A comparable property sold for $300,000 and generates monthly rent of $2,500. What is the GRM?
Correct Answer: 120. (GRM = $300,000 รท $2,500 = 120).
The Gross Rent Multiplier is calculated by dividing the sale price by the monthly gross rent. A GRM of 120 means the property sold for 120 times its monthly rent. If the subject property generates $2,000/month and the GRM is 120, the estimated value = $2,000 ร— 120 = $240,000.

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