Which of these is NOT a common form of lease?

In the context of common lease types, a vacancy lease is not recognized as a standard form. A gross lease, graduated lease, and percentage lease are all well-established forms of leasing agreements.

A gross lease is straightforward; the tenant pays a fixed rent, and the landlord covers all property expenses, such as maintenance, taxes, and utilities. This simplicity makes it a favored option for many tenants who prefer predictable costs.

A graduated lease includes provisions for predetermined rental increases over time, allowing for steady growth in rent payments. This type of lease is beneficial for landlords looking for consistency in income and tenants who may appreciate knowing their future financial obligations.

A percentage lease involves the tenant paying a base rent plus a percentage of the sales revenue generated from their business, commonly used in retail settings. This arrangement allows landlords to benefit from the success of their tenants.

In contrast, a vacancy lease does not correspond to a recognized leasing format. This term might imply aspects related to property vacancies or vacancy rates but does not pertain to an actual lease structure. Therefore, the correct identification of the uncommon lease type is the vacancy lease.