What This Clause Means
The 'net net net' in a triple-net lease refers to three costs you're paying on top of your base rent: property taxes, property insurance, and maintenance. In practice, NNN leases can add 20–40% above base rent in additional annual costs — and the exact amount often isn't clear until your first annual reconciliation.
NNN Leases Make Tenants Responsible for the Three Core Property Operating Costs
In a traditional gross lease, the landlord charges you rent and handles all property expenses from that income. In a triple-net lease, you pay base rent plus your proportionate share of property taxes, building insurance, and all maintenance and operating expenses. These three 'nets' can represent substantial additional cost. A retailer paying $25/sq ft base rent in a NNN lease in a suburban strip center might pay an additional $8–$12/sq ft in taxes, insurance, and CAM charges — effectively paying $33–$37/sq ft total. For a 3,000 sq ft space, that's $24,000–$36,000/year in additional charges above base rent.
NNN Leases Were Designed for Single-Tenant Properties, Not Always Appropriate for Multi-Tenant Buildings
The NNN structure originated with single-tenant net leases — think a freestanding fast-food location or a bank branch building. In these structures, the tenant operates the entire property and it makes sense for them to bear all operating costs. The structure has been widely adopted in multi-tenant retail centers, office buildings, and industrial parks where it's less appropriate — a tenant in a 10-store strip center has no control over property tax assessment, the landlord's choice of insurance carrier, or the quality of exterior maintenance, yet they're on the hook for their proportionate share of all these costs.
Property Tax Pass-Throughs Can Create Significant Annual Volatility
Property taxes are a major NNN component and one of the most volatile. A commercial property reassessment — often triggered by a sale or significant capital improvement — can dramatically increase the tax base and therefore your NNN charges. A retail tenant who signed a lease when the property was assessed at $4 million might see their tax contribution jump 40% if the property sells for $7 million and gets reassessed. For a tenant occupying 15% of a building, a $120,000/year increase in property taxes means $18,000/year more in NNN charges — on top of base rent. Negotiate a base-year tax provision: your tax contribution is capped at current-year taxes, and you only pay increases above that baseline.
Insurance Pass-Throughs Require Scrutiny of Coverage Levels and Deductibles
The second 'net' in NNN is building insurance. Landlords are responsible for purchasing the insurance, but they pass the premium cost through to tenants. The concern: landlords may purchase coverage that primarily protects their interests (high liability limits, low deductibles for property they're rebuilding) rather than cost-effective coverage appropriate for the property. Confirm that your NNN insurance pass-through is limited to standard commercial property insurance at competitive market rates, not special riders, umbrella policies, or deductibles that effectively make you self-insure the first $50,000 of any loss.
Negotiating NNN Lease Terms Requires Understanding What 'Net' Actually Means
NNN leases are negotiable in ways many tenants don't realize. You can negotiate: expense stops (you pay NNN charges above a baseline amount per sq ft, landlord absorbs everything below); caps on controllable operating expenses at 5% annual increase; exclusion of capital improvements from operating expenses you're responsible for; and the right to audit all three nets annually. You can also negotiate what 'gross lease' elements to include — some NNN leases have the landlord maintain the HVAC and structural components even though the tenant pays insurance and taxes. The labels 'NNN,' 'modified gross,' and 'full service gross' cover a spectrum of expense allocation possibilities.
Understand Your Total Occupancy Cost Before Signing Any NNN Lease
Never evaluate a NNN lease on base rent alone. Request the landlord's operating expense budget for the current year and the prior year's actual expenses. Calculate your proportionate share (your sq ft divided by total leasable sq ft) and apply it to the historical expense figures. Add that to your base rent to get your estimated total occupancy cost. Then get independent verification: ask your broker for comparable NNN operating expense figures in similar properties in the same submarket. If the landlord's expense history is significantly below market, ask why — and verify that expenses weren't deferred.
What to Watch Out For
- Require landlord to retain responsibility for structural repairs, roof, and foundation
- Cap Tenant's obligation for capital expenditures with useful life beyond lease term
- Negotiate audit rights for all NNN charges
- Push for modified gross or gross-modified lease structure where possible
- Request base year comparison for tax and insurance pass-throughs
How to Negotiate This Clause
Request: the prior 2 years of actual operating expense statements before signing; a base-year tax provision capping tax pass-throughs at current assessment levels; a 5% cap on controllable operating expense increases; an explicit exclusion of capital improvements and landlord financing costs; and an annual audit right. Get the current-year estimated NNN charges in writing as an exhibit to the lease.
- Require landlord to retain responsibility for structural repairs, roof, and foundation
- Cap Tenant's obligation for capital expenditures with useful life beyond lease term
- Negotiate audit rights for all NNN charges
- Push for modified gross or gross-modified lease structure where possible
- Request base year comparison for tax and insurance pass-throughs
Example Language: Bad vs. Better
Landlord-Friendly (Risky)
"This is a triple net lease. In addition to Base Rent, Tenant shall pay 100% of all real property taxes, building insurance premiums, and maintenance and operating costs for the Premises, including the cost of maintaining all mechanical systems, roof, and structural components."
Tenant-Friendly (Better)
"Tenant shall pay its pro-rata share of real property taxes and building insurance. Maintenance obligations shall be limited to interior, non-structural elements. Roof, foundation, and structural repairs are Landlord's responsibility. Capital expenditures with useful life exceeding the Lease Term are Landlord's responsibility."
Frequently Asked Questions
- What does NNN mean in a commercial lease?
- NNN stands for triple net — tenants pay base rent plus three additional 'nets': property taxes, building insurance, and maintenance/operating costs. These add-ons often total 20–50% on top of base rent.
- Is an NNN lease good or bad for tenants?
- NNN leases favor landlords. Tenants absorb operating cost risk that would otherwise fall on the landlord. In exchange, base rents in NNN leases are typically lower — but total occupancy costs are unpredictable and can increase significantly.
- What is a modified gross lease?
- A modified gross lease is a hybrid where some costs are landlord's and some are tenant's, negotiated between the two. It's generally better for tenants than pure NNN because it provides more cost predictability.
- What is a 'base year' in a commercial lease?
- A base year provision means tenants pay their share of operating cost increases above the costs in the base year (typically the first year of the lease). This limits NNN exposure by protecting tenants from costs that were already baked into pricing.
- Can I negotiate an NNN lease into a gross lease?
- Rarely — the lease type is fundamental to how the property is financed and managed. You can negotiate modifications: CAM caps, expense exclusions, landlord responsibility for structural items, and audit rights within an NNN framework.