Air rights above a railroad corridor sold for development create:

Correct Answer

D) A separate estate above a defined plane

The question tests the concept of air rights as a separate, divisible estate in real property. The bundle of rights in land can be split horizontally, creating distinct ownership interests above and below a defined elevation. Why this is correct: "A separate estate above a defined plane" correctly describes the legal outcome when air rights are sold. The ownership of the three-dimensional space above a stated elevation (e.g., above 50 feet) is severed from the surface rights, creating a new, independent fee simple estate in that airspace. This is the mechanism used for developments like air-rights buildings over transportation corridors. Why the other choices are wrong: "A leasehold in the surface below" is incorrect because selling air rights creates a fee simple estate in the airspace, not a leasehold interest in the ground. The transaction is a sale of ownership, not a lease. "Fee simple ownership of the entire corridor" is wrong because the sale is specifically for the air rights above a defined plane; it does not convey ownership of the entire corridor, which includes the surface and the land beneath. "An easement benefiting the railroad" is incorrect because an easement is a right to use another's land for a specific purpose, not an ownership estate. Selling air rights creates a separate ownership estate, not merely an easement for the benefit of the seller (the railroad). Exam tip: Remember that air rights are a classic example of how the 'bundle of rights' in land can be severed vertically, creating separate, marketable estates above or below a defined horizontal plane.