Commercial lease guide
Common Area Maintenance, made clearer.
CAM is a group of shared property costs that some commercial leases pass through to tenants. Learn what may be included, how charges are allocated, and what to check in your own lease and annual statement.
CAM at a glance
Your share of shared costs.
The lease sets which costs can be charged and how they are divided. The statement shows what the landlord billed. You need both to ask useful questions.
Lease: definitions, allocation, caps, exclusions
Statement: billed categories and your share
Records: detail needed to verify a charge
The basics
What is CAM in a commercial lease?
Common Area Maintenance usually refers to costs for operating and maintaining areas shared by tenants. It often appears in a triple net lease or a modified gross lease, but the exact definition varies by agreement.
A tenant may pay a percentage of allowable expenses based on its pro rata share. The lease may adjust that formula, define different pools of costs, or exclude certain expenses. For terminology, see our guides to CAM charges and CAM fees.
Possible CAM categories
What might appear on the bill?
These are common examples, not a list of automatically permitted charges. Your lease controls what belongs in CAM.
Shared upkeep
Landscaping, snow removal, lighting, and cleaning of shared areas.
Parking and exterior
Routine parking lot maintenance, striping, and other shared exterior work.
Services and management
Security, common-area repairs, and management costs where the lease permits them.
The relationship
CAM and NNN are related, but not identical.
In many NNN leases, tenants pay property taxes, insurance, and CAM in addition to base rent. CAM describes the maintenance component; NNN describes a broader lease structure. How each cost is billed still depends on your agreement.
Compare CAM and NNN ↗A typical NNN breakdown
The categories and obligations in your signed lease govern.
Review your statement
Four questions worth asking.
Potential issues often become visible when you compare the annual CAM reconciliation with the lease and supporting records.
What counts as CAM?
Compare each billed category with the lease's definitions, exclusions, and any amendments.
How is your share set?
Check the premises area, denominator, allocation method, and any changes between years.
Are there limits?
Look for caps, gross-up rules, fee limits, and treatment of capital work.
What can you verify?
Request invoices, ledgers, area schedules, and calculations for charges you cannot confirm.
For more examples, see CAM reconciliation errors. A question or unusual charge alone does not establish an overcharge; verify it against the lease and billing detail.
Free resource
Put the questions to work.
Use the Tenant-First CAM Audit Checklist to review fees, capital costs, tenant share, and lease deadlines. It includes a worksheet and records request draft.
Your next step
See what your lease says about CAM.
Start with a free lease preview. Add an annual statement when you have one, then decide whether a full report is useful after seeing the initial results. Check your own audit and notice deadlines before taking action.