The lease structure on a commercial property determines who pays for what — and how much the landlord actually keeps after operating costs. Two properties with identical base rents can produce very different net income depending on whether operating costs flow to the tenant, are shared between the parties, or are absorbed entirely by the landlord. Understanding lease structures is not optional for commercial property owners in BC; it is foundational to evaluating a property's financial performance, negotiating renewals intelligently, and making acquisition decisions on accurate terms.
This guide explains the four principal lease structures used in BC commercial real estate — gross, modified gross, net, and triple-net — how each allocates operating costs, where each is most commonly used in the Greater Vancouver market, and what the implications are for landlords at different stages of a tenancy.
This article is provided for general informational purposes only and does not constitute legal or financial advice. The specific terms of your lease govern all operating cost obligations and recoveries. Consult qualified legal counsel about your specific situation. Read our full Editorial Disclaimer.
Terms like additional rent, operating costs, and proportionate share recur throughout this guide — our Commercial Property Management Glossary — BC & Greater Vancouver Terms Explained defines each one.
Why Lease Structure Matters More Than Base Rent
When evaluating a commercial tenancy, base rent is the most visible number — but it is not the most important one. What a landlord actually receives, net of operating costs, depends on which costs the lease allocates to the tenant and which remain with the landlord.
Consider two retail spaces in the same building, each at $30 per square foot per year in base rent. If one is on a gross lease — where the landlord absorbs all operating costs including property taxes, insurance, maintenance, and management — and the other is on a triple-net lease where the tenant pays all of those costs, the net income to the landlord could differ by $8 to $15 per square foot or more, depending on the building's operating cost profile. Over a 1,000 square foot space, that difference is $8,000 to $15,000 per year, compounding across the lease term.
Lease structure analysis is also essential when a property is acquired or refinanced. A building with below-market gross leases may appear to generate strong gross income while actually producing weak net income. Understanding the lease structure is the first step in any accurate assessment of a commercial property's financial performance.
The Four Lease Structures
Gross Lease
In a gross lease, the tenant pays a single, all-inclusive rent to the landlord. The landlord receives that rent and is responsible for paying all operating costs of the property — property taxes, building insurance, maintenance and repairs, management fees, utilities for common areas, and all other costs of ownership and operation.
From the tenant's perspective, a gross lease is simple and predictable: one payment, one number, no surprises from fluctuating operating costs. From the landlord's perspective, a gross lease means bearing all the risk of operating cost increases. If property taxes rise, if insurance premiums increase, if a major roof repair is required, those costs reduce the landlord's net income directly.
Gross leases are less common in BC commercial real estate than they were historically, and they are rare in new leases for retail and industrial properties. They still appear in some older office buildings, smaller commercial spaces, and short-term arrangements where simplicity is the priority. They are also sometimes used for spaces where the landlord controls utilities and building systems in a way that makes individual cost allocation impractical.
For landlords evaluating a property with existing gross leases, the critical question is whether the base rent is set at a level that genuinely covers operating costs and provides an adequate net return. In a rising cost environment — which Metro Vancouver has been for property taxes and insurance in recent years — a gross lease with no escalation provision erodes net income progressively over the term.
Modified Gross Lease
A modified gross lease occupies the territory between a full gross lease and a net lease. The tenant pays a base rent that covers some operating costs, and pays separately for others. Which costs fall on each side of the line is negotiated between the parties and defined specifically in the lease — making modified gross leases more varied in their actual structure than either pure gross or pure net leases.
Common configurations in BC commercial leases include:
- A base rent that covers the landlord's insurance and management costs, with property taxes paid separately by the tenant either directly or as additional rent. This is sometimes called a "net of taxes" or "semi-net" arrangement.
- A base rent that covers property taxes and insurance, with the tenant paying directly for utilities serving their space. This is common in office environments where each tenant's energy usage varies.
- A base rent that covers most operating costs, with the tenant responsible for internal maintenance and repairs within their demised space while the landlord maintains the building shell and common areas.
The defining characteristic of a modified gross lease is that the cost allocation is bespoke — it reflects the specific negotiation between the parties rather than a standard formula. This makes modified gross leases more administratively complex, because the landlord and their manager must track which costs flow to which party under each specific lease, rather than applying a uniform structure across the portfolio.
Modified gross leases are common in BC office markets, in mixed-use buildings with diverse tenants, and in situations where the parties want a structure somewhere between the simplicity of a gross lease and the full cost exposure of a net lease.
Net Lease (Single Net or Double Net)
A net lease requires the tenant to pay base rent plus one or more categories of operating costs directly. The terminology in this area is not perfectly standardized — "net lease," "single net," and "double net" (NN) are used with some variation in BC commercial practice — but the general principle is consistent: the tenant assumes responsibility for specified operating costs that would otherwise fall to the landlord.
In a single net lease, the tenant typically pays base rent plus property taxes, with the landlord retaining responsibility for insurance, maintenance, and management. In a double net lease, the tenant typically pays base rent plus property taxes and building insurance, with maintenance and management remaining with the landlord.
Net and double-net leases are used in BC commercial real estate but are less common than triple-net leases for retail and industrial properties. They appear more frequently in office leasing, in some older commercial properties, and where a tenant has the negotiating position to resist a full NNN structure.
For a landlord, a net lease improves the predictability of net income compared to a gross lease — the tenant bears property tax and potentially insurance risk — but the landlord still retains exposure to maintenance and management costs, which can be significant variables in the long run.
Triple-Net Lease (NNN)
A triple-net lease — NNN in common usage, sometimes written as "net-net-net" — is the lease structure most favourable to landlords in terms of cost recovery. Under a triple-net lease, the tenant pays base rent plus their proportionate share of all three main categories of building operating costs: property taxes, building insurance, and common area maintenance and operating costs.
In practice, "all three categories" in a well-drafted BC NNN lease typically means all recoverable operating costs of the property, not just a narrow definition of the three named items. The operating cost definition in most BC NNN leases is broad — covering property taxes, insurance, CAM, management fees, utilities for common areas, life safety compliance, and administrative costs — subject to negotiated exclusions.
Not every NNN lease delivers full cost recovery. In BC commercial practice, NNN leases come in several variants — absolute NNN (where tenants take on essentially all property costs including structural and capital items), standard NNN (where the landlord retains responsibility for structural and capital items), and modified NNN (where specific cost exclusions are negotiated). Our complete guide to NNN leases covers these variations and the specific lease provisions that determine whether NNN actually delivers what it promises.
The NNN structure is the dominant lease form for retail and industrial commercial real estate in BC. It is the standard expectation for strip retail, standalone retail, light industrial, and warehouse properties. In office leasing, NNN structures are used but modified gross arrangements are also common.
The landlord's benefit of the NNN structure is significant: operating cost risk is substantially transferred to the tenant, and the landlord's base rent income is closer to true net income. The landlord is still responsible for managing the property — collecting operating cost estimates, coordinating maintenance, preparing annual reconciliations — but the financial burden of cost increases falls primarily on the tenant rather than reducing the landlord's net return.
The practical performance of a NNN lease depends entirely on how well it is administered. A NNN lease that is not reconciled annually, where estimates are not updated to reflect actual costs, or where the operating cost definition is not fully utilized, performs like a modified gross or even a gross lease in practice — regardless of what the document says. The mechanics of operating cost recovery are covered in detail in our guide to CAM charges.
How Lease Structure Affects the Landlord's Net Income
The financial impact of lease structure becomes clearest through a worked example. The figures below are illustrative — actual rents and operating costs vary considerably by property type, location, and building age. Consider a 5,000 square foot retail space in a Metro Vancouver strip plaza. Annual operating costs for the landlord's share of the building attributable to that space — property taxes, insurance, CAM, and management — total $40,000 per year, or $8 per square foot.
Under a gross lease at $30 per square foot: the landlord collects $150,000 in annual base rent and pays $40,000 in operating costs, producing net income of $110,000, or $22 per square foot net.
Under a NNN lease at $22 per square foot base rent plus $8 per square foot in operating costs: the tenant pays $150,000 total ($110,000 base rent + $40,000 in operating cost recoveries), and the landlord nets $110,000 after returning the operating costs to cover actual expenses — again $22 per square foot net.
The gross income received by the landlord looks different. The net income is the same. This is why base rent figures cannot be compared across different lease structures without adjusting for operating cost exposure — the correct comparison is always net of recoverable (or unrecoverable) operating costs.
Where the structures diverge meaningfully is in who bears the risk of future cost increases. If property taxes increase by $5,000 next year:
- Under the gross lease, the landlord absorbs the full $5,000. Net income falls to $105,000.
- Under the NNN lease, the tenant's operating cost contribution increases by $5,000. The landlord's net income remains $110,000.
Over a five-year lease term in a market where property taxes and insurance have been rising consistently — which Metro Vancouver has been — this difference compounds substantially.
Lease Structure and the Rent-Setting Conversation
Understanding lease structure is essential when setting or renegotiating base rent, because the appropriate base rent level depends directly on what costs the tenant is absorbing. A NNN base rent should be lower than a gross rent for the same space, because the tenant is paying operating costs on top of base rent. Landlords who set NNN base rents at gross lease levels — and then also recover operating costs — are effectively double-billing, which creates tenant disputes and legal exposure.
Conversely, a landlord who negotiates a gross lease at the same rate they would charge for a NNN lease is giving the tenant the operating cost savings without getting anything in return. In the Metro Vancouver market, where operating costs are substantial, this is a meaningful difference.
When reviewing a lease for renewal, understanding the current lease structure — and what structure is appropriate given current market conditions and the property's cost profile — is one of the most important inputs to the rent discussion.
Mixed Portfolios: Managing Multiple Lease Structures in the Same Building
Many commercial buildings in BC have tenants on different lease structures — either because leases were executed at different times under different market conditions, or because the building has a mix of unit types and sizes that attracted different tenant profiles with different negotiating positions.
Managing a building with mixed lease structures requires tracking each lease independently. The financial reporting, CAM calculations, and operating cost allocations that apply to a NNN tenant are different from those that apply to a modified gross tenant in the same building. Errors in allocating costs between lease types — charging a gross lease tenant for operating costs they do not owe, or failing to recover operating costs from a NNN tenant because their lease is treated like a gross lease — are common in portfolios that are not carefully managed.
For landlords with mixed portfolios, lease abstraction — a structured summary of each lease's key financial provisions, including the operating cost structure — is the essential starting point for accurate financial management. This is also one of the questions to ask before hiring a commercial property manager: do they maintain lease abstracts that capture the structure of each lease in the portfolio?
Choosing a Lease Structure at the Time of Negotiation
When leasing vacant space or renewing an existing lease, the choice of structure is a negotiating decision. Several factors influence which structure is appropriate for a given transaction.
Market norms in the relevant submarket and property type set the expectation: BC retail and industrial are NNN markets; BC office has a mix. Deviating from market norms typically requires either a concession elsewhere (lower base rent for a gross structure) or a tenant with unusual negotiating leverage.
The landlord's operating cost exposure matters: in a building with high and unpredictable operating costs — older building systems, high municipal tax assessment, significant common area — a NNN structure provides more protection against cost volatility. In a building with stable, predictable operating costs, the difference is less significant.
Lease term affects the calculation: over a longer term, operating cost risk is greater, making NNN structure more valuable to the landlord. Over a short term, the additional administrative complexity of NNN may not be worth it for a smaller space.
Tenant quality and credit: a strong national tenant with significant negotiating power may insist on cap provisions that limit their total operating cost exposure regardless of actual costs. These caps effectively convert part of the NNN structure into a modified gross arrangement above the cap level. Understand the effective lease structure, including caps, before making decisions based on the label.
How Lease Structure Affects Property Management
The lease structure has direct implications for how a property is managed day to day. A portfolio of NNN leases requires rigorous CAM administration — monthly estimate tracking, year-end reconciliation, documentation of actual costs — to realize the full financial benefit of the structure. A portfolio of gross leases requires careful vendor management and cost control, because every dollar of operating cost the landlord can reduce flows directly to net income.
A property manager who does not understand the lease structures in their portfolio — and who applies a one-size-fits-all management approach regardless of whether each lease is gross, modified gross, or NNN — will inevitably produce errors: unreconciled CAM balances, incorrect operating cost charges, and financial reports that do not reflect the true net performance of the property. The broader legal context for all of this is covered in our guide to the BC Commercial Tenancy Act.
How RC-PM Approaches Lease Structure
The first step in onboarding any property to our management portfolio is a full review of every active lease — understanding the structure, the operating cost provisions, the recovery formula, and the specific costs that flow to each tenant. This review produces a lease abstract for each tenant that forms the operational basis for financial reporting and CAM administration going forward. This is part of lease administration done properly.
We manage properties across the spectrum of BC commercial lease structures: NNN retail and industrial, modified gross office, gross leases in older buildings, and mixed portfolios where multiple structures coexist in the same building. The financial reporting and operating cost administration we apply to each property reflects its specific lease structure rather than a template approach.
If you would like to discuss how your current leases are structured — or whether your operating cost recovery is being fully utilized — book a consultation.
Have a Question Not Covered Here?
Have a question about commercial lease structures or your specific lease portfolio that this guide didn't answer? Browse our FAQ for more details, or contact RC-PM directly — we're happy to walk through the lease structure on your specific property and what it means for your operating economics.
This article is provided for general informational purposes only and does not constitute legal or financial advice. The specific terms of your lease govern all operating cost obligations and recoveries, and the appropriate structure for any new lease depends on market conditions, property type, and tenant profile. Consult qualified legal counsel about your specific situation. Read our full Editorial Disclaimer.
