Enforceability of lease clauses requiring tenants to pay for common area maintenance

Learn if common area maintenance (CAM) clauses are enforceable in commercial leases. Use TermScore to audit your lease for hidden CAM liabilities today.

May 26, 2026TermScore Research577 words

Are CAM Clauses Enforceable?

Yes, common area maintenance (CAM) clauses are legally enforceable in commercial leases. Courts view these as standard contractual obligations where the tenant agrees to share the costs of maintaining shared spaces. Enforceability hinges on the clarity of the language, the reasonableness of the expenses, and adherence to the specific definitions outlined in the lease agreement.

Key takeaway: An enforceable CAM clause must clearly define what constitutes a 'common area' and provide a specific methodology for calculating the tenant's proportionate share of expenses.

The Anatomy of a CAM Clause

For a CAM clause to hold up in court, it must move beyond vague references to 'shared costs.' A robust clause typically includes specific inclusions and exclusions. If the lease is ambiguous, courts often apply the rule of contra proferentem, interpreting the ambiguity against the party that drafted the lease—usually the landlord.

Essential Components of Enforceable Clauses

  • Proportionate Share Calculation: The lease must define the tenant’s share, usually as a percentage of the total leasable area (e.g., 1,500 sq. ft. / 10,000 sq. ft. = 15%).
  • Defined Expenses: A list of specific items, such as landscaping, security, snow removal, and lighting.
  • Exclusion List: Items that should never be passed to the tenant, such as structural repairs, landlord’s marketing costs, or legal fees for lease disputes.

Action Item: Review your lease to ensure the 'Proportionate Share' formula is fixed and not subject to unilateral changes by the landlord.

Comparison: Controllable vs. Uncontrollable Expenses

Understanding the distinction between these two categories is vital for budget forecasting and legal challenges.

Expense TypeExamplesNegotiation Strategy
ControllableJanitorial, Landscaping, SecurityDemand a 3-5% annual cap on increases.
UncontrollableTaxes, Insurance, UtilitiesRequire transparency and proof of actual costs.

Action Item: Always negotiate a 'cap' on controllable expenses to prevent the landlord from passing through excessive service provider costs.

Red Flags and Legal Pitfalls

Even if a clause is technically enforceable, it may be predatory. Watch for these common traps:

  • Capital Expenditures: Landlords often try to pass through the cost of a new roof or HVAC system. These should be amortized over the useful life of the asset, not charged in full in one year.
  • Administrative Fees: Watch for 'management fees' that are calculated as a percentage of gross CAM costs, which incentivizes the landlord to increase spending.
  • The 'Catch-All' Clause: Language like 'and any other costs the Landlord deems appropriate' is a major liability.

Key takeaway: If a lease allows for capital expenditures without an amortization schedule, you are effectively paying for the landlord's property appreciation.

How to Audit CAM Charges

If you suspect your CAM charges are inflated, follow this process to assert your rights:

  1. Request an Itemized Statement: Under most commercial leases, you have the right to request a detailed breakdown of all CAM expenses for the prior year.
  2. Exercise Audit Rights: If the lease provides for it, hire a third-party auditor to verify the landlord’s invoices against the lease definitions.
  3. Compare Year-Over-Year: A sudden 20% spike in maintenance costs without a corresponding increase in service levels is a primary indicator of improper pass-throughs.

Action Item: Ensure your lease includes a 'Right to Audit' clause with a specific timeframe (e.g., 60 days after receiving the annual statement) to challenge figures.

The Role of AI in Lease Analysis

Manually reviewing complex CAM clauses across multiple properties is prone to human error and oversight. TermScore uses advanced AI to instantly scan your lease agreements, identifying hidden CAM liabilities, missing caps, and unfavorable definitions that could cost your business thousands. By automating the review process, TermScore ensures you understand your financial exposure before you sign, allowing you to negotiate from a position of data-backed strength.

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