What Is An NNN Lease

Paying the operating expenses does not transfer ownership or control of major capital items to the tenant. Roof replacement, structural repairs, and parking lot reconstruction are frequently carved out of the tenant's maintenance obligation and left with the landlord, depending on how the specific lease is drafted, so the term "triple net" describes an expense allocation, not a complete transfer of every future cost.

A landlord evaluating a lease that is marketed as triple net should read the maintenance and repair section directly rather than assuming the label guarantees zero out-of-pocket exposure, since lease language on this point varies more than the marketing shorthand suggests.

Under a gross lease, common in office buildings and some retail centers, the landlord quotes one rent figure that already includes taxes, insurance, and maintenance, and the landlord absorbs the risk if those costs climb faster than anticipated. Under an NNN lease, the quoted base rent is lower on its face because the tenant is paying the operating costs on top of it, which is why comparing two listings by base rent alone, without checking which structure applies, produces a misleading comparison.

Because the tenant handles day-to-day operating costs and, in many cases, the maintenance calls that come with them, an NNN lease reduces the landlord's active involvement to collecting rent and monitoring lease compliance, which is a meaningfully lighter workload than managing a multifamily property with turnover, repairs, and resident calls. This is part of why NNN-leased assets and the DSTs built around them are common landing spots for investors coming out of a management-intensive rental portfolio through a 1031 exchange.

The trade-off is concentration and credit risk. A single-tenant NNN property is only as reliable as the tenant behind it, and a vacancy in a single-tenant building means zero income until a replacement tenant signs, unlike a multi-tenant property where one vacancy is a partial income loss rather than a total one.

Most NNN leases include scheduled rent increases, often 1 to 2 percent annually or a flat step every five years, built into the lease term rather than negotiated at renewal. The initial term is typically ten to twenty years for a corporate-backed tenant, followed by renewal options the tenant, not the landlord, controls, which means the landlord's long-term income certainty depends on the tenant choosing to stay rather than any contractual guarantee beyond the current term.

A tenant's right to assign the lease or sublet the space to another operator matters more in an NNN lease than the base rent figure suggests, since a franchisee could sell the underlying business and hand the lease to a new, unproven operator without the landlord having much say in the transition. Some leases require landlord consent for an assignment, which gives the owner a chance to evaluate the new tenant's credit before agreeing, while others allow assignment with minimal landlord involvement, shifting more risk onto the property owner than the original tenant's credit profile implied at signing.

A landlord who buys a property expecting to hold a stable national brand for the full lease term should confirm exactly how much control the assignment clause actually preserves, since a permissive clause can turn a strong-credit purchase into a weaker one well before the lease itself expires.