Triple-net (NNN) leases are the default structure for single-tenant industrial, warehouse, and flex space in and around New York City. Understanding exactly how the three “nets” work — and where the negotiation really happens — protects both owners and tenants from costly surprises.
How NNN works for industrial and warehouse space
In a triple-net lease, the tenant pays a base rent plus the property’s operating costs, leaving the landlord with income that is closer to “net” of expenses. For industrial and warehouse property, this structure fits naturally: a single tenant usually occupies the entire building, controls how the space is used, and is best positioned to manage the costs of running it.
Because the tenant absorbs variable expenses, base rent under an NNN industrial lease is typically lower than it would be under a gross lease — but the tenant takes on cost risk. The total occupancy cost is base rent plus the three nets, so tenants should always evaluate deals on that all-in basis rather than headline rent alone.
The three nets explained
The “three nets” are the operating costs the tenant agrees to carry on top of base rent:
- Taxes: The tenant pays the property taxes (or its share, in a multi-tenant building). For industrial sites, where assessed values and tax rates can rise, this is a real long-term variable.
- Insurance: The tenant pays the building’s property insurance. Industrial uses often carry specific coverage requirements, and leases spell out minimum limits and which party is named insured.
- Maintenance / CAM: The tenant covers maintenance and common area maintenance (CAM) — parking lots, drive aisles, landscaping, lighting, and shared systems in multi-tenant parks. In a single-tenant building, this extends to most building upkeep.
The label “triple-net” does not, by itself, tell you who fixes the roof when it fails. That comes down to the specific maintenance and repair clauses, which is where most disputes originate.
Key negotiation points
The real work in an NNN industrial lease is defining the boundaries of the tenant’s obligations. The most heavily negotiated items include:
- Roof and structure: Even in a triple-net deal, landlords frequently retain responsibility for the roof, foundation, and load-bearing structure, while the tenant handles everything else. Specify whether “roof” means just the membrane or the entire structural roof, and who pays for replacement versus routine repair.
- HVAC: Heating and cooling systems are a common flashpoint. Tenants often accept routine maintenance but resist responsibility for full replacement of an aging unit, and may negotiate a cost cap or a requirement that the landlord deliver systems in good working order at the start.
- Environmental: Industrial sites carry contamination risk. Leases should allocate responsibility for pre-existing conditions (typically the landlord’s) versus contamination caused by the tenant’s operations, often supported by a baseline environmental assessment at move-in.
- Caps on controllable expenses: Tenants commonly negotiate annual caps on increases in controllable CAM (expenses the landlord influences, such as management fees and landscaping), while uncontrollable costs like taxes and insurance pass through without a cap.
- Audit rights: Tenants should retain the right to review the landlord’s expense records to confirm that pass-through charges are accurate and properly categorized.
Why NNN is common for single-tenant industrial
NNN suits single-tenant industrial property for a few practical reasons. The tenant typically uses the entire building and is in the best position to control utilities, maintenance, and how hard the facility is run. For owners, this means predictable, relatively passive income with reduced exposure to rising operating costs. For tenants, it means lower base rent and direct control over the space and its upkeep — valuable when operations depend on specific build-outs, loading configurations, or equipment.
The trade-off is risk allocation. Owners give up some upside on expense control; tenants take on variable costs that can climb over a long term. A well-drafted lease balances these by clearly defining responsibilities and capping the costs the tenant cannot control.
What owners and tenants should confirm before signing
Before committing, both sides should pressure-test the lease against the building’s real condition:
- Owners: Confirm the tenant’s required insurance limits, ensure structural carve-outs match how you intend to maintain the asset, and define CAM categories precisely so pass-throughs hold up.
- Tenants: Get a clear condition assessment of the roof, HVAC, and structure; negotiate replacement-versus-repair language and caps; and confirm a baseline environmental report so you are not inheriting prior liability.
A short due-diligence walk-through, with the lease in hand, prevents the most common post-signing disputes over who pays for major systems.
Bottom line
Triple-net leases give industrial and warehouse owners predictable income and give tenants lower base rent with operational control — but the value of the deal lives in the details: roof and structure carve-outs, HVAC replacement, environmental allocation, and caps on controllable expenses. Read the maintenance clauses as carefully as the rent. Sterea Realty Group handles industrial and warehouse leasing across every lease structure.
This article is for general informational purposes and is not legal, tax, or financial advice. Rules change and the specifics vary by property — consult a qualified professional about your situation.