CAM in Real Estate — What Common Area Maintenance Really Means for Tenants
In commercial real estate, CAM (Common Area Maintenance) refers to the operating expenses landlords pass through to tenants for maintaining shared areas of a property.
These costs can significantly increase total occupancy expense — and are often misunderstood or improperly allocated. Reviewing CAM in real estate leases is one of the most overlooked ways tenants lose money.
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What Is CAM in Real Estate?
In real estate, CAM covers expenses related to maintaining common areas of a property such as parking lots, landscaping, lighting, security, snow removal, and shared utilities.
CAM is most common in triple net (NNN) leases, where tenants pay base rent plus their proportionate share of operating costs.
These charges are often labeled as common area maintenance charges and are typically reconciled annually through a CAM reconciliation process.
How CAM Is Calculated in Commercial Real Estate
Landlords estimate CAM expenses at the beginning of the year. Tenants pay monthly estimates. At year-end, actual expenses are calculated and compared against what was collected.
If actual expenses exceed estimates, tenants receive a reconciliation statement and may owe additional payment.
Errors commonly arise in allocation percentages, admin fee markups, and inclusion of non-allowable expenses — often surfacing during reviews of CAM reconciliation errors.
Why CAM in Real Estate Matters Financially
Even small allocation errors in CAM can cost tenants thousands of dollars annually.
Because CAM charges recur every year, unnoticed overcharges compound over time. Audit windows — often 30 to 90 days — limit how long tenants have to dispute charges.
Understanding audit window deadlinesbefore they expire preserves negotiation leverage.
Review Your CAM Exposure Before the Deadline
A tenant-focused lease review can identify avoidable CAM exposure and clarify what your lease actually allows.
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