Class B Office CAM Reconciliation Guide for Landlords
Typical CAM pools, billing errors, gross-up mechanics, and BOMA standards for class b office properties.
Benchmark CAM per SF
$7.00 – $13.00 / SF
Source: BOMA EER / IREM 2024
Gross-Up Applicability
Very relevant — Class B buildings often have higher vacancy rates than Class A, making gross-up calculations critical. Variable operating expenses should be adjusted to reflect a standard occupancy level (typically 90-95%).
Typical CAM Pools
- Janitorial
- Utilities (common area)
- HVAC maintenance
- Elevator maintenance
- Landscaping
- Management fees
- Insurance
- Property taxes
Standard Exclusions
- Tenant improvements
- Leasing commissions
- Capital expenditures
- Structural repairs
Common Lease Structures
Modified grossNNNFull-service gross with expense stops
Common Billing Errors
- Failing to gross up variable expenses when occupancy drops below 85%
- Including capital repairs disguised as maintenance
- Inconsistent base-year calculations across different tenants
Relevant BOMA Standards
- ANSI/BOMA Z65.1-2024 (Office Buildings)
- Method A or B depending on floor configuration
Class B Office CAM Context
Class B offices have wider variance in CAM charges due to building age and condition. Older buildings may have deferred maintenance that landlords attempt to pass through as operating expenses.
Related Resources
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