CAM Billing for Ground Lease Structures

Ground leases are a fundamentally different ownership structure, and that difference ripples through every aspect of CAM billing. In a conventional commercial property, the landlord owns the land and the building, operates the building, and passes operating costs through to tenants via CAM. In a ground lease, the landowner (ground lessor) leases the bare land to a ground tenant, who builds improvements, operates them, and — if the building is multi-tenant — subleases space and becomes the CAM landlord.

The ground tenant sits in a dual role: they are a tenant (to the ground lessor) and a landlord (to their sub-tenants). That dual role creates CAM complications that do not exist in fee-simple ownership.

Ground Lease Structure Basics

Before addressing CAM specifics, the structure needs to be clear:

Ground lease terms typically run 50–99 years. The ground tenant's leasehold interest is a depreciating asset — at lease expiration, the improvements revert to the ground lessor (unless the lease provides otherwise). This reversion affects how capital expenditures and long-term maintenance are treated in the final decades of the ground lease.

Who Is the CAM Landlord?

In a multi-tenant building on ground-leased land, the ground tenant is the CAM landlord. They operate the building, contract with vendors, maintain common areas, and bill sub-tenants for their share of operating costs.

The sub-tenants' CAM experience is identical to what they would have in a fee-simple building — same expense categories, same reconciliation process, same audit rights. The ground lease is a layer of ownership structure that sits above the CAM calculation but affects specific cost items within it.

From a reconciliation standpoint, the property controller working for the ground tenant runs CAM the same way they would for an owned building, with three exceptions:

1. Ground rent — a cost the ground tenant pays that does not exist in fee-simple ownership
2. Structural maintenance responsibility — different allocation than fee-simple
3. Insurance layering — the ground lessor may require specific coverage that the ground tenant must carry

Ground Rent: Pass-Through or Absorbed?

Ground rent is the periodic payment the ground tenant makes to the ground lessor for use of the land. It is analogous to a financing cost — the ground tenant is paying for the right to use land it does not own, similar to how a mortgage payment covers the right to use borrowed capital.

The Pass-Through Question

Can the ground tenant include ground rent in the operating expenses it passes through to sub-tenants?

The answer depends entirely on the sub-tenant lease.

If the sub-tenant's lease defines "operating expenses" to include "all costs incurred by Landlord in connection with the ownership, operation, and maintenance of the Property, including without limitation ground rent," then ground rent is recoverable.

If the sub-tenant's lease uses a standard operating expense definition that covers "maintenance, repair, and operation of the common areas and building systems," ground rent is not recoverable — it is a land cost, not an operating cost.

The dollar impact is significant:

An urban sub-tenant whose lease allows ground rent pass-through pays $6.00/SF more in operating expenses than an identical tenant in a fee-simple building. That is material — it can represent 30–50% of the total operating expense pass-through.

Escalation and Reset Clauses

Ground rent typically escalates over the lease term. Common escalation structures:

• Fixed increases: 10% every 5 years, or 2% annually
• CPI-based: Adjusted to Consumer Price Index at defined intervals
• Fair market resets: Ground rent resets to fair market value of the land every 10–25 years, determined by appraisal

Fair market resets can produce dramatic ground rent increases, especially in appreciating urban markets. A ground lease written in 1990 with a 25-year reset might see ground rent double or triple at the 2015 reset. If that ground rent flows through to sub-tenants, the reset produces a CAM increase that has nothing to do with building operations.

Property controllers need to track escalation schedules and reset dates. A ground rent reset year requires advance communication to sub-tenants because the increase appears in their operating expense reconciliation without any corresponding change in building services.

Structural Maintenance Under Ground Leases

In fee-simple ownership, the landlord is responsible for structural elements (roof, foundation, exterior walls, structural frame) as an ownership cost that is typically excluded from CAM. The landlord maintains the building because they own it and want to preserve its value.

In a ground lease, the ground tenant maintains the building — but they do not own the underlying land, and they will lose the improvements at lease expiration. This creates a different incentive structure and a different cost allocation:

Lease-Term Dynamics

Early in the ground lease (years 1–40 of a 99-year term): The ground tenant has decades of remaining term. They invest in maintenance and capital improvements because they benefit from the building's condition for a long time. Structural maintenance costs are treated the same as in fee-simple — landlord (ground tenant) absorbs them as a cost of ownership.

Late in the ground lease (years 70–99 of a 99-year term): The ground tenant's incentive to invest in long-term capital improvements diminishes because the improvements revert to the ground lessor at expiration. A roof replacement with a 20-year useful life, installed in year 85 of a 99-year ground lease, gives the ground tenant only 14 years of benefit before reversion.

This late-term dynamic can affect CAM in two ways:

1. Deferred maintenance increases operating costs. If the ground tenant defers a roof replacement, patch repairs increase. Those patch repairs are operating costs that may flow through CAM, while the deferred capital project would not have been in CAM.

2. Accelerated amortization of capital costs. If the ground tenant does replace the roof, they may amortize it over the remaining ground lease term (14 years) rather than the asset's useful life (20 years). This produces a higher annual amortization charge. Whether that accelerated amortization can flow through the sub-tenants' CAM depends on lease language about amortization periods.

Insurance Allocation

Ground leases create a layered insurance requirement that is more complex than fee-simple ownership:

The ground lessor's lease often requires the ground tenant to carry specific insurance coverages, name the ground lessor as an additional insured, and maintain minimum coverage limits that may exceed what the ground tenant would otherwise carry. The incremental cost of the ground lessor's insurance requirements is a cost of the ground lease, not a building operating cost. Whether it is recoverable from sub-tenants depends on their lease definitions.

Example cost impact:

A ground tenant carries $5 million in liability coverage for a 200,000 SF office building. Annual premium: $80,000. The ground lessor requires $10 million in coverage. The incremental premium for the additional $5 million: $35,000. If the sub-tenant leases do not include ground-lessor-mandated insurance in the operating expense definition, the ground tenant absorbs the $35,000.

Property Tax Complications

Property taxes under ground leases are assessed on both the land and the improvements, but the tax bill may come in different configurations:

Single assessment: The assessor issues one tax bill covering land and improvements, sent to either the ground lessor or the ground tenant depending on local practice and the ground lease terms. The ground tenant passes through the full tax to sub-tenants (if their leases allow it).

Split assessment: The assessor issues separate bills for land and improvements. The ground lessor may pay the land tax directly (and include it in the ground rent), while the ground tenant pays the improvement tax.

Reconciliation impact: If property taxes are split, the property controller must ensure the correct components are included in the sub-tenant pass-through. Passing through the land tax when the ground rent already includes it creates double-billing. Excluding the improvement tax when the sub-tenant lease includes taxes creates under-recovery.

This is a common error in ground lease CAM. The tax bill format does not always align with the ground lease allocation, and the property controller may not have visibility into whether ground rent already includes a land tax component.

Unique Ground Lease CAM Challenges

1. Subordination and Non-Disturbance

Sub-tenants in a ground-leased building face a risk that does not exist in fee-simple: if the ground tenant defaults on the ground lease, the ground lessor can terminate the ground lease and potentially extinguish the sub-tenants' leases. Most sub-tenants negotiate subordination, non-disturbance, and attornment (SNDA) agreements with the ground lessor.

This does not affect CAM calculations directly, but it affects the sub-tenant's willingness to sign a long-term lease and pay escalating CAM charges. A sub-tenant in year 3 of a 10-year sublease on a ground lease with 15 years remaining faces a different risk profile than a sub-tenant in a fee-simple building.

2. Capital Improvement Timing Near Lease Expiration

Major capital improvements near the end of a ground lease term raise questions about cost recovery through CAM. If the ground tenant installs a new HVAC system in year 90 of a 99-year lease, and the lease allows amortization of capital improvements through operating expenses, the 9-year remaining term produces a much higher annual amortization charge than the 20-year useful life would.

Sub-tenants may argue that the accelerated amortization is artificially inflating their operating expenses and that the amortization period should be the useful life of the asset, not the remaining ground lease term. The sub-tenant lease needs to address this specifically to avoid disputes.

3. Ground Lessor Consent Costs

Some ground leases require the ground lessor's consent for subleases, alterations, or changes in use. The ground lessor may charge a consent fee or require legal review at the ground tenant's expense. These administrative costs are not building operating expenses and should not flow through CAM, but they sometimes get coded to general administrative GL accounts that are included in the recoverable pool.

4. Reversion Reserves

Prudent ground tenants establish reserves for the condition of the property at lease expiration. The ground lease may require the improvements to be in a specified condition at reversion. Maintaining that condition in the final years may increase operating expenses as deferred maintenance is addressed. Whether those catch-up costs are recoverable through CAM depends on whether they constitute normal maintenance (recoverable) or deferred capital investment (not recoverable).

How CapVeri Handles Ground Lease CAM

Ground lease structures require configuration that standard reconciliation tools do not support. CapVeri addresses this with:

• Ground rent tracking: Maintains ground rent payment schedules, escalation terms, and reset dates separately from building operating expenses
• Selective pass-through: Configures which sub-tenant leases allow ground rent, ground-lessor insurance, and land tax pass-through and which do not
• Amortization period controls: Supports both useful-life and remaining-term amortization for capital improvements, with flagging when the two diverge significantly
• Insurance layer separation: Tracks base insurance costs separately from ground-lessor-mandated incremental coverage

The result is a reconciliation that reflects the actual cost structure of ground lease operations, not a fee-simple template that ignores the ownership layer.

Related Resources

• Pro-Rata Share Calculation — The allocation math that underlies all CAM billing
• CAM Reconciliation vs. Estimate — How estimates and actuals interact in complex lease structures
• Vacancy Cost Allocation — Handling vacant space in the ground tenant's building
• Defensible Reconciliation Package — Building reconciliation packages that withstand audit