1.2 Physical and Economic Characteristics of Real Property

The Three Physical Characteristics

Land has three inherent physical traits. Remember them with DUI reversed - Immobility, Indestructibility, and Uniqueness (non-homogeneity).

• Immobility: The geographic location of land can never change. Soil can be moved, but the legal parcel stays put. This is why real estate is governed by the law of the state where it sits and why local markets matter.
• Indestructibility: Land is durable and cannot be destroyed; improvements depreciate, but the land endures. This supports land's role as a long-term investment.
• Non-homogeneity (uniqueness / heterogeneity): No two parcels are exactly alike, even side-by-side lots, because each occupies a different location.

Exam connection: because each parcel is unique, courts grant specific performance (forcing the sale) rather than mere money damages when a seller breaches, since the buyer cannot simply buy an identical substitute.

The Four Economic Characteristics

These explain how land behaves in markets. A common memory aid is SAIL is sometimes used, but the standard four are Scarcity, Improvements, Permanence of investment, and Area preference.

Situs (area preference) is generally considered the most important economic characteristic influencing value. A modest house in a desirable district can outsell a larger house in a weak location.

Land Versus Improvements in Valuation

Land and improvements behave differently. Land does not depreciate; improvements do. This matters for the cost approach to value, where an appraiser estimates land value separately and then adds the depreciated cost of improvements.

Worked example - separating the two:

• A property sold for $480,000.
• The appraiser estimates the site (land) value at $150,000.
• The improvement value is therefore $480,000 - $150,000 = $330,000.
• Only the $330,000 of improvements is subject to depreciation for tax and appraisal purposes; the $150,000 land value is not depreciated.

Exam trap: do not depreciate land. If a question asks for an annual depreciation deduction, apply the rate only to the improvement value, never to the combined price.

Surface, Subsurface, and Air Rights

Ownership of land extends downward and upward, but each layer can be sold or leased separately.

• Surface rights: the ground level itself.
• Subsurface rights: minerals, oil, gas, and water beneath the surface. These can be severed and sold; an owner may keep the surface but sell the mineral rights.
• Air rights: the space above the land, now limited by reasonable navigable airspace for aircraft. Air rights can be sold (think of buildings constructed over rail yards).

Water rights flow from these principles:

1. Riparian rights attach to land along a moving waterway (river, stream).
2. Littoral rights attach to land bordering a stationary body (lake, ocean) up to the average high-water mark.
3. Doctrine of prior appropriation (common in dry western states) assigns water use by permit and beneficial use, not by adjacency.
4. Accretion adds soil gradually (owner gains land); erosion removes it gradually; avulsion is sudden loss.

How the Characteristics Drive Market Behavior

The physical and economic traits are not trivia; they explain everyday market facts the exam loves to connect.

• Immobility explains why supply cannot relocate to meet demand, so local shortages persist and prices are local, not national.
• Scarcity plus area preference together explain why prices in a fixed-supply, high-demand district climb faster than in an area with abundant developable land.
• Indestructibility plus permanence of investment explain why land is treated as a stable, illiquid, long-horizon asset rather than a quick trade.
• Improvements can cut both ways: a new transit station can raise nearby values, while a new landfill can lower them.

Worked example - the effect of situs on price per square foot

House A: 2,000 sq ft in a top-rated school district sells for $600,000, or $300/sq ft. House B: 2,500 sq ft of identical construction two miles away in a weaker district sells for $562,500, or $225/sq ft.

Despite being 25 percent larger, House B sells for less per square foot. The gap is area preference (situs), not construction quality. On the exam, when a fact pattern holds size and quality constant but changes location, the answer almost always points to situs.

Tying the characteristics to specific exam answers

Use this table as a quick mental lookup. Many missed questions come from picking a broadly true characteristic (scarcity) when a more precise one (situs) is the controlling reason in the fact pattern.