Understanding the Commercial Real Estate Triple Net Lease

Tenet Equity

June 9, 2026

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6 min read

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Understanding the Commercial Real Estate Triple Net Lease

A triple net lease, commonly written as NNN, is one of the most widely used structures in commercial real estate. Under this agreement, the tenant pays not only base rent but also the three primary property operating expenses: property taxes, building insurance, and maintenance. For business owners evaluating a sale-leaseback, understanding how an NNN lease works is foundational — it's the structure that makes the transaction function.

What the Three "Nets" Actually Mean

Each "net" represents a category of expense that transfers from the landlord to the tenant:

Property taxes: The tenant pays property tax bills directly or reimburses the landlord for them.
Insurance: The tenant is responsible for procuring and maintaining adequate coverage on the building.
Maintenance: The tenant covers ongoing upkeep and, in most NNN leases, structural repairs — including the roof, foundation, and major systems like HVAC.

This is best understood in contrast to other lease structures.

Under a gross lease, the landlord absorbs most operating expenses and charges the tenant a single all-inclusive rent payment.

Under a double-net (NN) lease, certain costs are shared between the landlord and tenant.

In a triple-net (NNN) lease, responsibility for property taxes, insurance, maintenance, and capital expenditures is largely shifted to the tenant. As a result, NNN leases typically feature the lowest base rent of the three structures. They also provide tenants with greater control over property-related expenses, allowing them to determine maintenance priorities and negotiate directly with service providers and contractors.

Because tenants control these variable costs, total occupancy expenses under a NNN lease are often the lowest of the three types of lease structures, particularly for operators who prefer to actively manage their real estate costs.

Why the NNN Structure Matters for Sale-Leasebacks

Real estate is often a company's lowest-yielding asset. A sale-leaseback converts dormant equity into productive capital that can be invested where management has a competitive advantage and the potential to generate superior returns. For middle-market companies pursuing a sale-leaseback, the NNN lease is the standard framework. When a company sells its property to a capital partner and signs a long-term NNN lease to remain in the facility, several things happen at once:

The company converts a fixed, illiquid asset into working capital. The capital partner receives a predictable income stream. And the business retains full operational control of the property deciding how the facility is used, maintained, and managed, just as it did when it owned it.

This dynamic is why the sale-leaseback is more accurately described as a corporate finance transaction than a real estate one. The sale-leaseback is the mechanism to extract embedded equity; but the proceeds are commonly used for add-on acquisitions, debt reduction, equipment investment and other capital initiatives to increase shareholder value.

Tenet Equity structures these transactions across a range of industries, including manufacturing, distribution, retail, service, and healthcare.

The Investor Side of the Equation

Understanding why investors seek NNN-leased properties helps explain why the market for these transactions remains active. For REITs, insurance companies, and private equity firms, a NNN-leased asset with a creditworthy long-term tenant offers bond-like income with minimal landlord obligations. The investor collects rent without having to actively manage the property. The property taxes, insurance, and maintenance are the tenant's responsibility.

Key Takeaways

In a triple net lease, the tenant assumes responsibility for property taxes, insurance, and maintenance — in addition to base rent.
The NNN structure is the standard framework for sale-leaseback transactions because it provides predictable, passive income for the investor while preserving operational control for the tenant.
For business owners, signing a long-term NNN lease as part of a sale-leaseback allows full use of the facility to continue uninterrupted after the property transfers to a new owner.

Frequently Asked Questions

What are the three nets in a triple net lease? The three nets are property taxes, building insurance, and maintenance. In an NNN lease, the tenant pays all three in addition to base rent, transferring most property-related costs away from the landlord.

How does a triple net lease differ from a gross lease? Under a gross lease, the landlord covers operating expenses and charges the tenant a single inclusive rent. This often leads to over charging so the landlord can build reserves and protect from unknown risks. Under a triple-net (NNN) lease, those costs shift to the tenant, typically resulting in a lower base rent, and a lower total occupancy cost given the actual maintenance expenses are managed by the tenant.

Why is the NNN structure used in sale-leaseback transactions? It gives the capital partner a clean, predictable income stream with minimal management burden, which makes NNN-leased properties attractive to investors. For the business operators, it lowers their overall cost of capital and mirrors the experience of ownership — full control of the facility without the capital tied up in the asset.

Who benefits from a triple net lease? Both parties benefit, it’s a win-win transaction. The landlord receives passive, low-maintenance income. The tenant typically pays a lower base rent and retains control over how the property is operated and maintained which is particularly valuable in a long-term sale-leaseback arrangement.

Is an NNN lease standard for commercial properties? It's common for freestanding single-tenant commercial properties — industrial, retail, medical, and service type properties.. It is the most efficient structure for sale-leaseback transactions in the middle market and most commonly used.

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