Mixed-Use Vertical CAM Reconciliation Guide for Landlords
Typical CAM pools, billing errors, gross-up mechanics, and BOMA standards for mixed-use vertical properties.
Benchmark CAM per SF
$8.00 – $20.00 / SF
Source: BOMA EER / ULI 2024
Gross-Up Applicability
Highly relevant and complex — each use type (retail, office, residential) may have different occupancy levels requiring separate gross-up calculations. Shared building systems must be allocated across uses with distinct cost drivers.
Typical CAM Pools
- Lobby/common area maintenance
- Elevator maintenance
- Security
- Utilities (common area)
- HVAC (shared systems)
- Landscaping
- Parking (shared)
- Insurance
- Property taxes
- Management fees
Standard Exclusions
- Residential amenity costs (pool, gym)
- Capital improvements
- Leasing commissions
- Use-specific regulatory costs
Common Lease Structures
Common Billing Errors
- Allocating residential amenity costs (pool, rooftop) to commercial tenants
- Using a single load factor across retail and office floors
- Failing to separate elevator costs between freight (retail) and passenger (office) usage
- Incorrect vertical penetration calculations in mixed-use towers
Relevant BOMA Standards
- ANSI/BOMA Z65.1-2024 (Office Buildings)
- ANSI/BOMA Z65.4 (Multi-Unit Residential)
- Mixed-use allocation guidance
Mixed-Use Vertical CAM Context
Mixed-use vertical buildings (retail podium, office mid-rise, residential tower) present the most challenging CAM scenarios. Each use type generates different costs, operates on different schedules, and has different lease structures. The allocation methodology must be defensible across all three use types.
Related Resources
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