NNN vs Gross Lease vs Modified Gross: How to Choose and Negotiate Your Commercial Lease
Commercial leases are not standardized the way residential leases are. The same 1,000 square foot space listed at '$20/sq ft' can cost you wildly different amounts depending on whether it is a NNN, gross, or modified gross lease. Understanding the structure before you negotiate is the difference between a manageable overhead and a lease that breaks your business.
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The Quick Answer
A gross lease is the simplest: you pay one number and the landlord covers most building expenses. A NNN (triple net) lease is the most common in retail: you pay base rent plus property taxes, insurance, and maintenance — which often adds 30–50% on top of the quoted rate. A modified gross lease splits the expenses in a negotiated way. For a new business, always calculate the all-in monthly cost, not just the listed base rent.
Side-by-Side Breakdown
Gross lease: tenant pays flat rent, landlord pays taxes, insurance, maintenance, most common in office buildings, easier to budget, typically higher base rent to compensate landlord. NNN lease: tenant pays base rent + property taxes (N) + building insurance (N) + maintenance/CAM (N), most common in retail strip centers and freestanding buildings, lower base rent but total cost is often 20–40% higher, maintenance expenses can vary year to year. Modified gross lease: expenses split by negotiation — common to have tenant pay utilities and janitorial while landlord covers taxes and insurance, most flexible structure, terms vary by deal.
What to Negotiate in a NNN Lease
CAM cap: negotiate an annual cap on CAM increases (typically 3–5% per year). Exclusivity clause: prevent the landlord from leasing to your direct competitor in the same center. Tenant improvement allowance (TIA): landlord contributes toward your build-out — this is negotiable even in a tenant's market. Personal guarantee limits: try to limit your personal guarantee to 6–12 months of rent rather than the full lease term. Rent abatement: request 1–3 months of free rent while you build out and ramp up. Co-tenancy clause: if your business depends on anchor tenant traffic, include a clause that reduces your rent if the anchor leaves.
Red Flags in a Commercial Lease
Unlimited CAM charges with no cap. Relocation clauses (landlord can move you to a different unit). No exclusivity provision. Personal guarantee for the full lease term. Radius restriction clauses that limit where else you can open. Assignment restrictions so tight you cannot sell your business without landlord approval. Any of these should be negotiation points, not just accepted.
The Verdict
A gross lease is simpler and better for new businesses if you can find it. When NNN is the only option (as it is in most retail markets), the structure is not inherently bad — but the details matter enormously. Never sign a commercial lease without an attorney review. A $500 legal review can prevent a $50,000 mistake.
How to Get Started
1. Research available spaces on LoopNet and note the lease type listed. 2. For any space you are seriously considering, request the full lease document and a 3-year CAM reconciliation history. 3. Calculate your all-in monthly cost: base rent + estimated CAM + utilities + insurance. 4. Have a commercial real estate attorney review before you sign — Rocket Lawyer or a local commercial attorney works. 5. Negotiate at least one concession: TIA, free rent period, or CAM cap.
RECOMMENDED TOOLS
Rocket Lawyer
Have your commercial lease reviewed by an attorney before you sign
LiquidSpace
Test a location short-term before committing to a long lease
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FREQUENTLY ASKED QUESTIONS
What does 'per square foot' mean in commercial leasing?
Commercial rent is quoted annually per square foot. A 1,000 sq ft space at $24/sq ft per year costs $2,000/month in base rent ($24,000 / 12). In NNN leases, the quoted rate is base rent only — add CAM, taxes, and insurance on top.
How long should my first commercial lease be?
Aim for the shortest initial term the landlord will accept — typically 1–3 years for a new business. Longer terms (5–10 years) give you better rent rates and more leverage for TIA, but they also expose you to more risk if your business changes or the location underperforms.
Is a personal guarantee required for a commercial lease?
In most cases for a new business without an established credit history, yes. Landlords require a personal guarantee because an LLC without assets provides little security. Try to negotiate the guarantee down to 6–12 months of rent rather than the full lease term.
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