In real estate, what term refers to an ownership structure that includes an indeterminate duration without a specified end date?

The term that describes an ownership structure with an indeterminate duration and no specified end date is known as a Freehold Estate. This type of estate typically implies an ownership interest in real property that is indefinite in duration, meaning the owner can hold onto the property for as long as they wish, potentially even indefinitely, unless they decide to sell or transfer it.

In contrast, a Leasehold Estate is a temporary ownership model that has a specific end date, defined by the lease agreement. Commonhold Estate refers to a situation where all owners of units in a development share ownership of common areas but does not fit the definition of indeterminate ownership. Tenancy at Will is an arrangement where a tenant occupies property without a lease for an undefined period, but it still implies a temporary rental situation rather than true ownership.

The Freehold Estate is the appropriate term in this context because it embodies the characteristics of permanent ownership that does not include a predetermined expiration. This makes it fundamentally different from the other options, which incorporate elements of limitation or shared ownership.