What do air rights typically allow the owner to do?

Air rights refer to the ownership of the space above a piece of property, allowing the owner to control and utilize the vertical space in that area. These rights are particularly significant in urban environments where vertical construction can often be a key aspect of real estate development. When a property owner has air rights, they can construct additional stories on their building or develop new structures that take advantage of the space above their current property, thereby maximizing their investment and enhancing the property's value. This capability is especially crucial in densely populated areas where land is limited, making air rights a valuable asset for real estate developers.

The other choices do not accurately reflect the purpose of air rights. Constructing underground buildings relates more to subsurface rights, and using land for agricultural purposes pertains to land use rights rather than the airspace above it. Selling the property without restrictions is not specific to air rights and misrepresents the concept, which is focused on the vertical space above the land rather than unqualified ownership.