1.2 Physical and Economic Characteristics of Real Property

Physical and Economic Characteristics

Land is unlike any other commodity, and the exam tests why. There are three physical characteristics and four economic characteristics. A reliable mnemonic for the physical set is I-I-U and for the economic set is SIPA.

The three physical characteristics (I-I-U)

Trap: Improvements (buildings) do depreciate and can be destroyed. The physical characteristic of indestructibility applies to the land itself, not the structures on it.

Uniqueness and specific performance

Because every parcel occupies a different point on earth, no two are interchangeable. This is why courts grant specific performance in real-estate contracts: if a seller breaches, money damages cannot buy an identical substitute, so the court can order the seller to actually convey the property.

The four economic characteristics (SIPA)

1. Scarcity — usable land in a given area is limited; relative shortage supports value.
2. Improvements — adding a building or roads changes the value of that parcel and surrounding parcels.
3. Permanence of investment — capital sunk into land and improvements (sewers, utilities) is fixed for a long period; investors expect a long, stable return.
4. Area preference (situs) — people's preference for a particular location. This is the single most important economic influence on value.

Situs in action and the three physical layers

Situs is location desirability, not mere geography. Two identical houses can differ in value by tens of thousands of dollars purely because one is in a preferred school district or a quieter street. The appraiser's adage "location, location, location" is literally the economic characteristic of area preference.

Worked numeric: Two physically identical 1,800 sq ft homes are listed. Home A sits in a top-rated district; Home B is a half-mile away in a weaker district. If the district premium runs about $35/sq ft, the situs adjustment is 1,800 x $35 = $63,000 of additional value attributable to location alone.

Land also has three physical layers, each separately conveyable:

• Surface rights — the ground itself.
• Subsurface (mineral) rights — everything below, including oil, gas, and minerals.
• Air rights — the space above, limited by reasonable aircraft navigation.

Putting the characteristics to work on questions

Exam writers rarely ask you to recite the lists; they describe a fact pattern and ask which characteristic explains an outcome. Train the reflex of mapping a scenario to its driver.

Why immobility and situs dominate practice

Immobility is the reason all real estate practice is local: licensing, agency law, recording, and disclosure rules are set by each state, which is exactly why the Oregon exam has a separate state portion. Because the asset cannot relocate to a friendlier market, its value is hostage to its surroundings — the economic characteristic of situs.

Worked numeric (situs gap): A builder offers two identical 2,000 sq ft plans. Lot A overlooks a protected greenway; Lot B backs to a commercial parking lot. If the market pays a $22/sq ft premium for the greenway view, the situs adjustment is 2,000 x $22 = $44,000. Nothing about the houses differs — only location preference — which is why situs is called the single most important economic influence on value.

Permanence of investment and the appraiser's mindset

Permanence of investment explains why infrastructure (sewers, streets, utilities) is financed over decades and why investors accept long holding periods: capital sunk into land cannot be pulled back quickly. Combined with scarcity, it underlies the principle that well-located land tends to appreciate while the depreciating structure on top of it wears out — a distinction Chapter 3 builds on when separating land value from improvement value in the cost approach.

Trap to memorize: Indestructibility applies to the land, never the building. A question stating "real property does not depreciate" is only true of the land component; improvements depreciate and are insured, taxed, and valued separately.

Tying the seven characteristics to investment decisions

Investors lean on these traits when underwriting. Scarcity plus area preference is why infill lots in supply-constrained cities command premiums; permanence of investment is why investors model long holding periods and accept illiquidity; immobility is why they study local employment, schools, and zoning rather than national averages.

Indestructibility of land is also why lenders treat land as durable collateral and why insurance covers the structure, not the dirt. A question asking why an investor accepts a lower current yield on land near a planned transit line is testing anticipation layered on situs — the expectation that area preference will rise. Recognizing which characteristic drives a stated decision is more valuable than reciting the lists.