Triple Net Lease (NNN): NYC Office Leasing, Explained

How a triple net lease works in a New York lease

The mechanics are easy to misprice. The landlord quotes a base rent for the space, and the tenant separately pays its proportionate share of the three nets: real estate taxes, the landlord's building insurance, and the cost of maintaining and operating the property. That share is usually a percentage of the building's rentable area, so the first thing we check is how it was calculated.

Manhattan offices mostly declined to adopt the structure and run instead on gross and modified gross leases, where the rent carries the building's costs for a stated base year and the tenant pays the increases above it. The NNN quote survives at the edges: retail condos under office buildings, industrial and flex space, and the occasional whole-building deal that shifts the operating risk to the tenant.

A worked example, gross against net

Take the one benchmark we publish: the citywide median asking rent on our book is $75 per square foot per year, a gross figure with taxes, insurance, and base-year operating costs already inside it. An NNN quote sitting beside it at a visibly lower base rent is not a discount; it is the three nets waiting to be added back, which can push the true cost up by something on the order of a third.

The honest comparison is an all-in figure: add the building's current taxes, insurance, and operating budget per square foot to the net base rent, and confirm what the gross deal's base year covers before the two numbers share a spreadsheet line. A net quote that looked cheap against the $75 median can land above it.

What is negotiable, and what we push on

Almost everything about the nets is negotiable except their existence. The definition of operating expenses is the main event: we push to exclude capital expenditures, structural repairs, the landlord's financing costs, and leasing commissions, and to cap the management fee. An annual cap on the controllable operating costs is a standard ask; taxes and insurance usually float, but what counts as a tax can be tightened.

The audit right is the tenant's only real enforcement tool: the right to examine the landlord's books, a window long enough to use it, and the landlord bearing the cost when an overstatement crosses a threshold. We also verify the proportionate share, because a generously measured building inflates every pass-through for the term.

The traps that cost tenants money

Four patterns account for most of the money tenants lose on net deals.

• Comparing headline rents across structures. An NNN base rent set against a gross asking rent understates the net deal's true cost by the full value of the pass-throughs.
• Loose expense definitions. When the third net is defined vaguely, capital projects migrate into maintenance and the tenant funds improvements to a building it does not own.
• Tax resets. Taxes are a net the landlord neither controls nor caps, so a reassessment or a sale of the building can raise the pass-through sharply mid-term; confirm on the specific lease how a reset reaches you.
• The measured share. A share built on inflated rentable square footage overcharges on every net, every year, so we recompute it rather than accepting the first draft's number.