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Recovery of past CAM overcharges depends on your specific lease terms, including any audit rights deadlines or ‘binding and conclusive’ provisions, and on applicable state law.

State statute of limitations periods apply to written contracts and range from 3 to 10 years. Your actual lookback window may be shorter based on your lease.

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  4. /Single Net Lease (N)

Single Net Lease (N): CAM Audit Guide

Last updated: April 2026

By Angel Campa, Founder

Single Net Lease (N) tenants face specific billing risks tied to how expenses are allocated and reconciled. The most common error appears in the section below. CAMAudit runs 14 forensic detection rules on your reconciliation statement to identify every recoverable dollar.

Most Common Overcharge

Landlords pass through landlord-generated late payment penalties from the taxing authority, or include special municipal assessments (road improvements, sidewalk districts) that go beyond standard ad valorem taxes. Some landlords also attempt to classify certain operating costs as "tax equivalents" to shift maintenance responsibility.

What Is a Single Net Lease (N)?

The most landlord-favorable of the "gross" structures and the least common net lease variant. The tenant pays base rent plus their pro-rata share of property taxes only. The landlord retains responsibility for building insurance, all maintenance, CAM expenses, and structural costs.

Single Net Lease (N) Expense Pass-Throughs

Tenant pays: base rent and property taxes (pro-rata share only). Landlord pays: building insurance, all CAM expenses, structural maintenance, roof, parking, landscaping, utilities, and all other operating costs.

Single Net Lease (N) CAM Calculation & Billing

No CAM reconciliation. Tenant receives a property tax pass-through billed as their fractional share of the municipal tax bill. Typically billed monthly as an estimated amount and trued-up annually when the actual tax bill is received.

Red Flags to Watch

  • ▶Tax bill that is higher than the publicly searchable assessed value for the parcel
  • ▶"Special assessment" line items for road, sidewalk, or infrastructure district charges
  • ▶Landlord late-payment penalty amounts embedded in the tax pass-through
  • ▶Any expense beyond property taxes appearing on the tenant's bill
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Check Your Single Net Lease (N) for These Overcharges

Upload two PDFs. 14 detection rules. Under 15 minutes. Free.

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Audit Focus

Obtain and verify the actual municipal property tax bill. Confirm no late penalties are included. Review whether any "special assessments" are included and whether your lease explicitly allows or excludes them. Verify the pro-rata denominator.

Common Industries

  • →Specific industrial (single-tenant)
  • →Older standalone retail
  • →Government-leased properties

Explore Other Lease Types

Triple Net Lease (NNN)Double Net Lease (NN)Modified Gross LeaseFull Service Gross Lease (FSG)Absolute Net LeaseGround LeasePercentage LeaseIndustrial Gross LeaseRetail LeaseOffice LeaseMedical Office LeaseRetail Net Lease (NNN Retail)Flex Space LeaseBondable Net Lease
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Don't Overpay on Your Single Net Lease (N)

Upload two PDFs. 14 detection rules. Under 15 minutes. Free.

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Related Guides

NNN LeasesOverview
The Commercial Tenant's Guide to Triple Net (NNN) Leases
NNN LeasesOverview
What Is an NNN Lease? Complete Tenant Guide (2026)
NNN LeasesOverview
Triple-Net Lease Overcharges: Patterns and Recovery

Explore Related Resources

Lease TypeTriple Net Lease (NNN)Lease TypeDouble Net Lease (NN)GlossaryTriple Net LeaseGlossaryNet Lease

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Related Resources

ResourcesCAM Audit by Tenant TypeToolsFree CAM Audit ToolsGlossaryCAM GlossaryToolsPro-Rata Share Calculator

Related Articles

  • NNN Lease Tenant Guide
  • What Is an NNN Lease?

Frequently asked questions

Need to extract lease terms before your audit?

A CAM audit is only as accurate as your lease data. lextract.io extracts 126 structured fields from any commercial lease PDF: CAM definitions, pro-rata share, caps, base year, and audit rights. So you have the exact terms your landlord is supposed to follow.

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This page provides general educational information. It is not legal advice and may not reflect the most current law in your state. Consult a licensed attorney for advice specific to your situation.