If you're leasing warehouse, flex or manufacturing space in Indianapolis, you'll almost certainly see the letters "NNN." The triple-net lease is the standard structure for industrial property in Central Indiana. Yet I regularly meet business owners who signed an NNN lease in Indianapolis without fully understanding what they'd be paying each year. This guide breaks down exactly how a triple-net lease works, what it costs, and how to protect yourself.
What "triple net" means in an Indianapolis industrial lease
In an NNN lease, the tenant pays base rent plus three categories of property expenses:
1. Property taxes — your proportionate share of the building's real estate taxes
2. Insurance — your share of the landlord's property insurance premium
3. Common area maintenance (CAM) — snow removal, landscaping, parking lot repairs, exterior lighting, management fees and similar costs
In a single-tenant building, you typically pay 100% of these expenses. In a multi-tenant building, you pay a pro-rata share based on your square footage.
How NNN charges are billed
Most Indianapolis landlords estimate annual NNN expenses at the start of each year and bill one-twelfth monthly alongside base rent. After year-end, they reconcile actual costs against the estimates. If actual costs ran higher, you receive a bill; if they ran lower, you receive a credit. Budget for reconciliation — a cold winter with heavy snow removal can surprise tenants.
Why NNN leases dominate the Indianapolis industrial market
Landlords prefer NNN leases because they shift the risk of rising expenses to tenants and make income predictable, which supports property values and financing. Tenants accept them because it's the market standard and because base rents are lower than in gross leases. The key is knowing your total cost.
Base rent plus NNN = your real occupancy cost
The most common mistake I see is comparing industrial spaces on base rent alone. Imagine Building A asks a lower base rent but carries high NNN charges because of older roofs, a large shared parking lot and a recently expired tax abatement. Building B asks a higher base rent but has much lower NNN charges. Building B may actually cost less. Always add base rent and estimated NNN charges, then multiply by your square footage and lease term to compare total occupancy cost.
Not every "NNN lease" in Indianapolis is the same
The label doesn't tell you who pays for big-ticket items. Read the lease carefully for:
• Roof replacement: Is it the landlord's capital expense or passed through to tenants?
• HVAC replacement: Many leases make tenants responsible for HVAC maintenance and even replacement.
• Parking lot reconstruction: Repairs may be CAM; full replacement should usually be the landlord's cost.
• Structural repairs: Foundations, walls and roof structure are typically the landlord's responsibility.
• Management fees: Some leases add a percentage of rent or revenue.
Variations like "modified gross" or "absolute net" leases shift these responsibilities further one way or the other.
Property taxes and abatements in Indiana NNN leases
Indiana caps property taxes on commercial and industrial property at 3% of gross assessed value, but effective tax bills vary by county and taxing district. Many newer buildings around Indianapolis benefit from local tax abatements that phase out over several years. When an abatement steps down, your NNN charges rise. Always ask when abatements expire and how taxes are projected to change.
How to protect yourself in an NNN lease
• Request two to three years of actual operating expenses
• Negotiate a cap on annual increases in controllable CAM expenses
• Exclude capital replacements, or require them to be amortized over their useful life
• Secure audit rights to review the landlord's records
• Ask for an HVAC inspection and warranty at move-in
• Confirm whether the landlord appeals property tax assessments
NNN leases for small-bay and flex space
Multi-tenant small-bay and flex buildings in Carmel, Fishers, Noblesville and Indianapolis often have higher CAM per square foot than large single-tenant warehouses because of shared parking, landscaping and exterior maintenance. That's normal — just budget for it.
Frequently asked questions about NNN leases in Indianapolis
What does NNN stand for? Triple net: the tenant pays taxes, insurance and maintenance in addition to base rent.
Are NNN charges included in the asking rent? Usually no. Industrial listings typically show base rent and estimated NNN charges separately.
Can NNN charges go up during my lease? Yes. Taxes, insurance and maintenance costs can rise; caps on controllable expenses help limit increases.
Who pays for a new roof in an NNN lease? It depends on the lease. Many Indianapolis leases leave roof replacement with the landlord, but some pass it through.
Negotiate your NNN lease in Indianapolis with an expert
I help Indianapolis and Hamilton County tenants model true occupancy costs, compare NNN leases side by side and negotiate protections that save money over the life of the lease.
Annie Scott — Annie Scott Realty Group LLC / F.C. Tucker Company Cell: (317) 902-8622 ·
