Law firm office lease: the overhead line items you're missing
Law firms track billable hours, client disbursements, and operating expenses with precision. The firm's managing partner knows the realization rate. The office administrator knows what the monthly utilities cost. But the annual CAM reconciliation, which can represent $30,000 to $150,000 or more in additional overhead for a mid-size firm, often gets paid without a line-by-line review.
Here's the thing: Class A and B office buildings have some of the most complex CAM pools in commercial real estate. Lobby concierge services, building security, parking structure maintenance, fitness center operations, and conference center costs may all flow through the operating expense pool. Whether each of those items belongs in your pool, and whether the math is correct, is worth checking.
Office building CAM: Common area maintenance charges in multi-tenant office buildings, which may include lobby services, elevator maintenance, building security, HVAC for common areas, parking structure maintenance, conference facilities, and fitness centers. Unlike retail CAM, office building CAM often includes a broader range of amenity and service costs that vary significantly by building class and landlord.
What's in a Class A office building CAM pool
Class A buildings in major markets offer amenities that tenants value: concierge services, building security with access control, high-end lobby finishes, on-site property management, sometimes fitness centers or conference rooms. These services are real operating expenses, and they appear in the CAM pool.
For a law firm occupying two floors of a Class A building, the CAM pool might include:
Lobby and concierge services. Building staff at the lobby desk, visitor management systems, and security personnel. Some buildings have elevated staffing during evening and weekend hours when law firm attorneys are frequently working.
Access control and security systems. Badge access, camera systems, alarm monitoring, and after-hours security rounds. In large office buildings, these costs are substantial.
Elevator maintenance. Multi-elevator high-rise buildings with freight elevators, express cars, and passenger elevators have complex maintenance contracts. The full cost flows into CAM.
Parking structure maintenance. If the building includes an owned or managed parking structure, maintenance, lighting, and administration of the structure may appear in CAM. For a law firm where partners and senior associates rely on covered parking, this is a meaningful cost.
HVAC for common areas. Lobby, corridor, restroom, and shared floor HVAC systems are shared operating expenses. HVAC for your leased space is typically billed separately or included in base rent depending on the lease structure.
Fitness center or conference center operations. Some buildings include fitness facilities or shared conference rooms as a building amenity. Their operating costs may be in the CAM pool.
After-hours HVAC charges and the CAM boundary
This is a distinction that many law firm office administrators miss, and it's worth understanding clearly.
Standard office building HVAC operates during business hours. After-hours HVAC, requested for weekend work sessions or late-night deal closings, is typically billed as a tenant-specific charge outside of CAM. It is an extra charge invoiced to the requesting tenant directly.
The CAM boundary issue arises when a landlord includes a portion of after-hours HVAC costs in the general operating expense pool rather than billing the requesting tenant directly. If your lease's CAM definition excludes tenant-specific services (as most well-drafted leases do), after-hours HVAC charges flowing into the general pool are a misallocation.
More on that below when we look at what the exclusion list in your lease should cover.
Pro-rata share errors in office buildings
Office building pro-rata share calculations are more complex than retail because of how multi-floor tenancies, partial floors, and suite configurations interact with the rentable area calculation.
Directory changes and suite reconfigurations. Office buildings have higher turnover and more suite reconfiguration than retail centers. If a tenant expands, contracts, or reconfigures space, the rentable area changes. If the landlord's administration system doesn't update the denominator promptly, your pro-rata share may be calculated against a stale denominator.
Building common areas included in denominator. The denominator should represent income-producing tenant space. If the building's management offices, maintenance storage, mechanical rooms, or landlord-occupied amenity spaces are included in the denominator in a way your lease doesn't contemplate, your share shifts.
Loss factor and usable versus rentable area. Office leases are typically signed on rentable square footage, which includes a proportional share of common areas (measured using BOMA standards). If the rentable square footage in your lease is based on BOMA 1996 standards and the building has been remeasured under BOMA 2017 standards without adjusting your lease, the pro-rata calculation may be inconsistent.
What the exclusion list in your lease covers
Office leases typically have more detailed CAM exclusion lists than retail leases. Common exclusions include:
- Leasing commissions and marketing costs for vacant space
- Depreciation and amortization of building systems
- Debt service and mortgage interest
- Income taxes and franchise taxes on the landlord's income
- Costs to remedy building code violations that predate your lease
- Executive salaries above property manager level
- Costs covered by insurance proceeds
- Costs incurred for the benefit of a specific tenant other than you
The issue is not whether the exclusion list is comprehensive. It is whether someone verifies that the reconciliation actually excludes what the list requires.
If that sounds familiar, the honest answer is that most law firm tenants haven't compared the reconciliation line items to the exclusion list in years.
"Law firms are meticulous about client billing accuracy and internal cost control. The same scrutiny applied to the annual CAM reconciliation, which is effectively a bill the landlord presents with no independent verification, routinely turns up recoverable overcharges." — Angel Campa, Founder of CAMAudit
A review workflow for office administrators
Here is a structured approach to reviewing your firm's annual CAM reconciliation:
Step 1: Locate the operating expense provisions in the lease. Find the definition of "operating expenses" or "CAM expenses," the exclusion list, the management fee cap, and the pro-rata share formula.
Step 2: Review management fee line items. The property management fee is typically the largest variable in the reconciliation. Find the fee cap in your lease. Compare to the reconciliation. If there are multiple fee-related line items (management fee, administrative fee, supervisory fee), add them together.
Step 3: Check the pro-rata denominator. Request a current rent roll from the landlord. Calculate your percentage. Compare to the reconciliation.
Step 4: Scan the reconciliation against the exclusion list. For each item in your lease's exclusion list, confirm there is no corresponding line item in the reconciliation. Pay particular attention to leasing and marketing costs, depreciation, and executive compensation categories.
Step 5: Identify large or unusual line items. Any line item representing more than 10% of total CAM is worth understanding. Ask for backup documentation if the item is unclear.
Step 6: Check for capital expenses. Large HVAC, elevator, or building system repair costs may be capital items that should be amortized under your lease rather than expensed in the current year.
CAMAudit can process your reconciliation and flag potential violations at each of these checkpoints. Upload your statement for a free scan at CAMAudit.
What law firms typically recover
The most common findings in law firm office building reconciliations are management fee violations (where fees plus admin charges exceed the lease cap), pro-rata denominator errors (often from suite reconfiguration or incomplete denominator updates), and capital items expensed in the current year.
For a law firm with a $50,000 annual CAM obligation, a 1.5% management fee excess on a $400,000 operating expense pool represents $6,000 per year. Over a three-year lookback available under most leases, that is $18,000 in recoverable overcharges.
Questions office administrators ask about law firm lease CAM
Frequently Asked Questions
Are lobby concierge services included in CAM for my law firm?
In most Class A office buildings, lobby staffing and concierge services are included in operating expenses and therefore in your CAM pool. The relevant question is whether the allocation method matches your lease definition and whether the costs are reasonable relative to the service level.
Can after-hours HVAC requests end up in our CAM pool?
They should not if your lease excludes tenant-specific charges from CAM. After-hours HVAC should be billed directly to the requesting tenant. If you see HVAC-related costs in your CAM pool that appear to include after-hours service, compare to your lease's exclusion language.
How do I get the rent roll to verify our pro-rata share?
Your lease's audit rights clause entitles you to inspect the landlord's books and records. A written request citing the audit rights clause, asking specifically for the current rent roll and square footage schedule, is the standard approach.
What is a typical management fee cap in an office building lease?
Office building management fees typically range from 3%-5% of gross operating expenses. The cap in your specific lease controls, not the market range. Some building classes and markets have higher prevailing fees.
How far back can we contest CAM charges from prior years?
Most office leases provide a 12-month audit window from receipt of the annual reconciliation, though some extend to 18 or 24 months. The specific period in your lease controls. After the window closes, the charges are final.
Sources
- Building Owners and Managers Association (BOMA). Office building measurement and CAM administration standards. https://www.boma.org/
- IREM (Institute of Real Estate Management). Operating expense reconciliation resources. https://www.irem.org/
- American Bar Association. Law firm administration and facilities management resources. https://www.americanbar.org/
- Tango Analytics. "CAM Reconciliation: Why tenants should verify the math." https://tangoanalytics.com/blog/cam-reconciliation/
Upload your firm's CAM reconciliation to CAMAudit for a free scan. See which overhead line items in your office building statement are worth a closer review.