Co-working operators lease large office floors (5,000-50,000 sqft) and sublease individual desks, offices, and suites to members. They operate on thin margins where CAM overcharges directly compress member pricing competitiveness. Annual CAM exposure for this tenant type ranges up to $79,000-$150,000. CAMAudit runs 14 forensic detection rules specific to your lease structure in under fifteen minutes.
A CAM audit for a co-working operator examines whether HVAC costs are properly allocated (not bundled into general CAM), whether management fees are applied only to eligible operating expenses, and whether capital improvements are excluded from the operating expense pool.
TL;DR
Co-working spaces overpay $3,000 to $79,000 per year from HVAC allocation errors on high-density floors and common area charges on shared amenity spaces.
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Most co-working tenants recover $3,000 to $79,000. Results in under 15 minutes.
Free CAM audit → Find My OverchargesTypical Lease Structure
Full-floor or multi-floor office leases
Avg. Locations
2-50 for regional operators, 1-3 for independent co-working spaces
Annual CAM Exposure
$79,000-$150,000
Full-floor or multi-floor office leases, typically gross or modified gross in older buildings, NNN in newer Class A towers. CAM structures vary widely.
Co-working operators run 24/7 or extended-hours operations that consume substantially more HVAC than typical office tenants. When this is bundled into general CAM rather than direct-billed, co-working operators sometimes subsidize lighter users, and are sometimes over-allocated for their own after-hours usage because the general CAM pool includes costs that should be direct-billed back to them.
Office landlords often manage the TI build-out for co-working operators directly. Management fees charged on TI costs create overcharges when those improvement costs are subsequently amortized into the CAM pool as operating expenses. The management fee applies both to the improvement cost and to the amortization, creating a double-billing of the management fee percentage.
Office buildings with significant vacancy (common in post-2020 markets) see denominator changes as large tenants depart. Co-working operators whose leases were negotiated at high occupancy may find their pro-rata share increasing as the building empties, even if their absolute costs are unchanged.
HVAC Overtime in General CAM Pool
After-hours HVAC usage by co-working tenants is bundled into the general CAM pool and allocated proportionally to all tenants rather than direct-billed to the co-working tenant consuming the after-hours service.
Detection: Request the HVAC cost detail from the CAM ledger. Ask the landlord to identify which HVAC costs are direct-billed vs. pooled. Compare against your after-hours usage records.
Management Fee on TI Amortization
When the landlord manages a co-working TI build-out and subsequently amortizes the cost through CAM as a capital item, management fees are applied to the amortized amount, effectively charging a management fee on work that already had a management fee applied at the construction stage.
Detection: Identify any capital improvement amortization line items in the CAM ledger. Calculate the management fee that was applied to those items. CAMAudit Rule 3 flags this automatically.
Pro-Rata Share Creep from Vacancy
As office building occupancy declines, some landlords use the occupied GLA as the denominator rather than total GLA, increasing each remaining tenant's share beyond what the lease formula specifies.
Detection: Request the current rent roll showing all occupied and vacant suites with their square footages. Compare the denominator used in the reconciliation against total GLA per the lease. Rule 4 in CAMAudit detects denominator manipulation.
Janitorial Cost Inflation for High-Traffic Floors
Co-working floors receive more daily foot traffic than typical office tenants due to the hot-desk model and frequent member turnover. Landlords sometimes use this to justify above-market janitorial contracts or increased service frequency billed at the full cost to the co-working tenant without proportional benefit to other floors.
Detection: Request the janitorial contract and service schedule for your floor compared to other building floors. If your floor receives materially higher service frequency, verify whether the incremental cost is authorized by your lease or represents a discretionary landlord spending decision passed through as CAM.
Capital Improvement Amortization in Operating Pool
Lobby renovations, elevator upgrades, building HVAC replacement, and facade improvements are capital expenditures with useful lives exceeding one year. When these costs are amortized into the annual CAM pool as 'building improvements' or 'capital cost recovery,' co-working operators pay for multi-year capital investments through their annual operating expense obligation.
Detection: Review the CAM reconciliation for any amortization, depreciation, or capital recovery line items. Request documentation of the underlying capital project, its total cost, and the amortization schedule. If the useful life exceeds one year and your lease excludes capital improvements from CAM, the amortized charge is an unauthorized operating expense.
$8-$79/sqft
Typical annual CAM range for Class A office tenants, including co-working operators
Via: BOMA Office Experience Exchange Report (2024) ↗
58%
Percentage of office building CAM reconciliations that contain at least one billable error
Via: PredictAP Lease Audit Research (2023) ↗
$29,400
Average 2-year CAM overcharge recovery for co-working operators in CAMAudit audits
Via: CAMAudit Internal Data (2025) ↗
Watch For This Trigger
HVAC costs or janitorial line items spike 20%+ year-over-year without corresponding changes in building usage
Most co-working tenants recover $3,000 to $79,000. Results in under 15 minutes.
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Find My OverchargesHVAC Cost Allocation in Multi-Tenant Office Buildings
BOMA Standard Method for Measuring Floor Area in Office Buildings (2017)
BOMA's measurement standards establish how rentable vs. usable area should be calculated, directly affecting pro-rata share allocation in office leases.
Annual CAM Bill
$168,000
Typical Recovery
$18,000-$70,000
ROI Multiple
90-350x on $79 CAMAudit fee
Upload your lease. CAMAudit runs 14 detection rules in under 15 minutes.
When a CAM Audit May Not Apply
About the Author
Angel Campa is the founder of CAMAudit and a Principal SDET. He built CAMAudit after discovering that commercial tenants routinely overpay CAM charges due to errors that go undetected without forensic analysis. Connect on LinkedIn
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.
Go to lextract.ioThis 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.
