July 23, 2026
You've found a commercial space you like. The listing says $14 per square foot. You do the math on 2,000 square feet and budget $28,000 a year in rent. Then you sign the lease and discover your actual cost is closer to $38,000. What happened?
The listing quoted a triple net rate. And if you don't understand what that means, you're going to miscalculate your occupancy cost by thousands of dollars every year.
What Is a Triple Net Lease?
A triple net lease, commonly abbreviated as NNN, is a lease structure where the tenant pays base rent plus three categories of operating expenses: property taxes, building insurance, and common area maintenance (CAM). The "triple" refers to those three expense categories. The "net" means those costs are passed through to the tenant on top of the base rent.
In Eastern North Carolina, NNN is the dominant lease structure for commercial properties. Whether you're leasing office space in Greenville, a retail storefront in Fayetteville, or a warehouse near Wilmington, the lease will almost certainly be structured as triple net. Understanding how it works is not optional. It's a basic requirement for making an informed leasing decision.
Why NNN Dominates Eastern NC Commercial Real Estate
NNN leases are popular with landlords because they create predictable net income. The property owner collects rent and passes the variable operating costs through to tenants. This protects the landlord from rising property taxes, insurance premiums, and maintenance costs.
For the market as a whole, NNN creates transparency. When every listing quotes a base rate on the same structure, tenants can compare properties more easily. The challenge is that many tenants, especially first-time commercial tenants, don't realize the quoted rate is only part of the picture.
Calculating Your True Occupancy Cost
Your total occupancy cost under a NNN lease is base rent plus your share of the three expense categories. Here's how that typically breaks down in Eastern NC:
- Property taxes: $1.50–$3.50 per square foot, depending on the county and the property's assessed value. Pitt County (Greenville) and New Hanover County (Wilmington) tend to be on the higher end. Rural counties are lower.
- Building insurance: $0.50–$1.50 per square foot. Coastal properties carry higher insurance costs due to hurricane and flood risk. Inland properties are typically at the lower end.
- Common area maintenance (CAM): $1.50–$4.00 per square foot. This covers shared expenses like landscaping, parking lot maintenance, exterior lighting, common area cleaning, and property management fees.
In total, NNN expenses in this region typically run $3.50–$8.00 per square foot per year. So that $14/SF NNN lease? Your actual cost is $17.50 to $22.00 per square foot once you add the pass-throughs. On 2,000 square feet, that's $35,000 to $44,000 per year, not $28,000.
Always ask for the current expense estimates before evaluating a space. Any competent landlord or listing broker will provide them. If they won't, that's a red flag.
What to Watch For in NNN Expenses
Not all NNN expenses are created equal. Here are the areas where tenants most often get surprised:
CAM reconciliation. Most leases charge CAM based on estimated monthly payments, then reconcile annually against actual expenses. If actual costs exceeded estimates, you get a bill for the difference. These reconciliation charges can be significant, especially in the first year of a lease when estimates haven't been calibrated to actual spending.
Property tax reassessments. County tax assessors periodically reassess property values, and reassessments can trigger meaningful increases in your tax pass-through. This is particularly relevant if you're leasing in a property that recently sold, since the sale price often establishes a new, higher assessed value. In Pitt County, reassessments happen on a regular cycle, but a property sale can trigger an off-cycle adjustment.
Management fees baked into CAM. Many landlords include a property management fee, typically 3–5% of gross rents, as a CAM expense. This is standard, but you should know it's there. Some landlords also include administrative overhead charges on top of the management fee. Those are negotiable.
Capital expenditure pass-throughs. Some leases allow landlords to pass through the cost of capital improvements, like a new roof or parking lot repaving, as part of CAM. This can create large, unexpected charges. Look for language that distinguishes operating expenses from capital expenditures and limits what can be passed through.
NNN vs. Gross Lease: Pros and Cons for Tenants
A gross lease bundles everything into a single rate. You pay one number per square foot, and the landlord covers taxes, insurance, and CAM out of that amount. Gross leases are less common in Eastern NC but do exist, particularly in multi-tenant office buildings.
Advantages of NNN for tenants: Transparency into actual operating costs. Lower base rent (on paper). Ability to verify that expenses are reasonable. In a well-managed property, NNN can actually result in lower total costs because you're paying actual expenses rather than a landlord's padded estimate.
Disadvantages of NNN for tenants: Budget uncertainty. Your occupancy cost can increase year over year without any change in base rent. CAM reconciliation bills create cash flow surprises. You're exposed to property tax increases and insurance market fluctuations.
Advantages of gross leases for tenants: Budget certainty. One predictable payment. No reconciliation surprises. Simpler accounting.
Disadvantages of gross leases for tenants: Higher base rate (the landlord builds in a cushion for expense variability). Less transparency. If operating costs come in lower than expected, the landlord keeps the difference.
Neither structure is inherently better. The right choice depends on your tolerance for variable costs and how important budget predictability is to your business. Use our cap rate calculator to model different scenarios.
Negotiation Tips for NNN Leases
The NNN expenses themselves are often more negotiable than tenants realize. Here are the provisions worth fighting for:
- CAM caps. Negotiate a cap on annual CAM increases, typically 3–5% per year. This protects you from runaway expense growth. Without a cap, there's no limit on how much your CAM charges can increase from one year to the next.
- Expense audit rights. Include a provision that gives you the right to audit the landlord's operating expense records. If the audit reveals overcharges above a certain threshold (typically 3–5%), the landlord pays for the audit. This keeps landlords honest in their expense reporting.
- Base year stops. In some markets, you can negotiate a base year stop, where you only pay NNN increases above the expense level in your first lease year. This is more common in gross-modified structures but can be adapted to NNN leases.
- Capital expenditure exclusions. Push for language that excludes capital improvements from operating expense pass-throughs, or at minimum requires that capital costs be amortized over their useful life rather than charged in a lump sum.
- Management fee caps. If the landlord includes a management fee in CAM, negotiate a fixed percentage cap rather than accepting an open-ended charge.
- Controllable expense limits. Separate controllable expenses (things the landlord can influence, like landscaping and cleaning contracts) from uncontrollable ones (taxes, insurance). Cap the controllable category.
How I Help Tenants Evaluate NNN Terms
When I represent tenants as their tenant representative, NNN analysis is one of the first things we do. Before comparing any two spaces, I build a total occupancy cost model that accounts for base rent, current NNN estimates, projected escalations, and the value of any concessions like free rent or tenant improvement allowances.
Two spaces that look identical at their base rate can differ by tens of thousands of dollars over a five-year term once you model the NNN expenses and escalation structures. That analysis is what separates an informed decision from a guess.
If you have questions about a lease you're evaluating, or if you want help understanding the NNN terms in a proposal, reach out. You can visit our FAQ page for common questions, book a call here, or email me at sebastian@mullarkeycre.com.