What type of estate allows a tenant to occupy a property indefinitely as long as the landlord provides consent?

An estate at will is a type of tenancy that allows a tenant to occupy a property indefinitely, contingent upon the landlord's consent. This arrangement is flexible and can be terminated by either the landlord or the tenant at any time, without the necessity of a formal notice or a specified duration. The key aspect here is the ongoing, mutual consent between the parties involved.

In contrast, an estate for years has a definite start and end date, which means it does not allow for indefinite occupancy. An estate at sufferance occurs when a tenant remains in a property after the lease has expired, without the landlord's consent, which does not fit the description of indefinite occupancy with consent. A period to period estate, typically referred to as a periodic tenancy, operates on a rolling basis (e.g., month to month or year to year) but also includes a specified duration for its cycles, rather than the indefinite aspect of an estate at will. Therefore, the defining characteristic of an estate at will is its reliance on the landlord's permission for the tenant's continued occupancy, which perfectly matches the question's criteria.