An NNN lease, short for triple net lease, is a commercial lease structure where the tenant pays base rent plus the three operating cost categories: property taxes, building insurance, and maintenance. The owner still holds title and still carries the mortgage, but the recurring operating expenses that would normally erode a landlord's net income are billed to the tenant instead.
The Lease Spectrum, Not Just One Box
NNN sits at one end of a spectrum. A gross lease puts nearly all operating costs on the landlord, with the tenant paying a flat rent that already assumes those expenses. A modified gross lease splits some costs, often utilities or janitorial, between landlord and tenant while leaving others with one party. Single net and double net leases pass along one or two of the three categories rather than all three.
Calling a lease NNN when it is actually a double net, with the landlord still covering roof and structure, is a common source of confusion in listings, which is why buyers should request the actual lease document rather than relying on how a broker's flyer labels it.
Why Landlords and Tenants Both Accept the Structure
From the landlord's side, NNN reduces exposure to rising property taxes and insurance premiums, both of which have climbed in many markets over the past several years, by passing that increase directly to the tenant rather than absorbing it into a fixed rent. From the tenant's side, a national chain or franchisee often prefers controlling and reporting its own occupancy costs, and is willing to accept that responsibility in exchange for a lower base rent than a fully gross lease would carry.
What Still Falls to the Owner
- Financing the purchase and refinancing at term maturity
- Roof and structural replacement, unless the lease specifically shifts this to the tenant
- Finding a new tenant if the current one vacates or defaults
- Capital improvements the tenant is not contractually obligated to fund
- Property-level decisions such as a sale, refinance, or lease renewal negotiation
An owner who assumes an NNN lease means zero ongoing involvement is usually surprised the first time a major capital item comes up that the lease did not actually assign to the tenant.
How This Fits a 1031 Exchange in Atlanta
An NNN lease structure is popular as 1031 replacement property because it produces a rent stream that looks close to passive without moving into a DST's full loss of control. An Atlanta investor exiting a self-managed rental portfolio can trade into a single NNN property and cut the day-to-day workload substantially while still holding direct title, which matters to owners who want simplicity but are not ready to give up decision-making authority the way a DST interest requires.
The tradeoff is concentration. A single NNN property means a single tenant, and if that tenant vacates, the owner has one vacant building rather than a diversified stream, which is worth weighing against a multi-property or DST alternative during identification.
Reading the Reimbursement Language Before Trusting the Label
The words triple net on a listing flyer are a summary, not a legal description, and the actual reimbursement mechanics live in the lease's operating expense clause. Some leases cap annual increases in controllable expenses like maintenance while leaving taxes and insurance uncapped, which changes how exposed the tenant, and by extension the property's competitive rent, really is to a spike in either category.
A buyer who skips the lease and relies on a broker's one-line summary can end up owning a building where the actual cost allocation looks nothing like what triple net implies, which is why requesting the full lease and any amendments before making an offer is standard practice for experienced net lease buyers.
Common Questions
What does NNN stand for in commercial real estate?
NNN stands for triple net, referring to the three operating cost categories, property taxes, insurance, and maintenance, that the tenant pays in addition to base rent under this lease structure.
Is an NNN lease always fully net, with no landlord costs at all?
No. Even under a true NNN lease, the landlord typically still handles financing, roof and structural replacement unless the lease states otherwise, and finding a new tenant if the current one leaves, so the lease document should be reviewed rather than assumed from the listing description.
How is an NNN lease different from a gross lease?
In a gross lease the landlord pays taxes, insurance, and maintenance out of a flat rent, while in an NNN lease those costs are billed directly to the tenant on top of a typically lower base rent.
Why do single-tenant NNN properties often trade at low cap rates?
Investors accept a lower cap rate in exchange for a simpler, more predictable income stream and reduced landlord responsibility, particularly when the tenant carries strong credit and a long remaining lease term.
Can an owner exchange a self-managed rental for an NNN property?
Yes, both qualify as investment real property under 1031 like-kind rules, so an owner can move from an actively managed rental into a single-tenant NNN lease and reduce day-to-day management without losing exchange eligibility.
