What Is Common Area Maintenance? A Guide for Hawaii Commercial Property Owners and Tenants
By Benavente Group
Let's break down what is common area maintenance, how it's calculated, why it matters for valuation, and what Hawaii commercial property owners and tenants should watch for.
You lease space in a Honolulu retail center. The rent line on your lease says $6,000 a month. But when the bills arrive, you're also paying for parking lot cleaning, landscaping, shared lighting, security, common area utilities, and property management fees. Your total occupancy cost is meaningfully higher than the base rent alone.
Those additional charges have a name. CAM. And understanding how they work is one of the most important things any commercial owner or tenant can do, whether you're negotiating a lease, evaluating an investment, or contesting an assessment.
Let's break down what is common area maintenance, how it's calculated, why it matters for valuation, and what Hawaii commercial property owners and tenants should watch for.
The Basic Definition
Common area maintenance, or CAM, refers to the operating expenses associated with maintaining, operating, and repairing the shared spaces of a commercial property. These are areas that benefit all tenants but aren't part of any individual tenant's leased premises.
CAM covers items like lobbies, hallways, parking lots, elevators, common restrooms, landscaping, exterior lighting, and shared building systems. In multi-tenant commercial properties, these costs are typically passed through to tenants under CAM provisions in their leases.
When someone asks what is common area maintenance, the cleanest way to frame it is: it's the cost of maintaining everything that's shared, allocated among the tenants who benefit from it.
Where CAM Fits in Lease Structures
CAM is one of the three main components of operating expenses passed through to tenants under most net lease structures. The other two are property taxes and property insurance. Together, these three "nets" define the triple net lease (NNN).
Triple net leases pass all three categories through to tenants. The tenant pays base rent plus a proportionate share of CAM, taxes, and insurance.
Modified gross leases may pass some of these expenses through and absorb others into the landlord's costs.
Gross leases have the landlord absorb all operating expenses, with the tenant paying only base rent.
Understanding what is common area maintenance in context requires understanding how it flows through the lease structure the tenant signed. A $30 per square foot NNN lease with $12 CAM plus taxes and insurance is a very different economic proposition from a $42 per square foot gross lease that appears more expensive at first glance.
What CAM Typically Includes
CAM covers a defined set of shared costs, though the exact list varies by lease and property type.
Common categories:
- Cleaning and janitorial services for shared areas
- Landscaping and grounds maintenance
- Parking lot maintenance, striping, and repairs
- Exterior lighting and shared electrical
- Common area utilities (lobby air conditioning, hallway lighting)
- Security services
- Elevator maintenance
- Snow removal (not relevant in Hawaii, but standard elsewhere)
- Common area repairs
- Property management fees
- Administrative charges
What's typically excluded:
- Structural repairs (usually the landlord's responsibility)
- Capital improvements above operating maintenance
- Costs specific to individual tenant spaces
- Leasing commissions or marketing costs
The specific inclusions and exclusions matter. A lease that pushes capital replacement costs into CAM is very different from one that keeps them as landlord obligations.
How CAM Is Calculated
The standard approach allocates total CAM expenses among tenants based on their pro rata share, calculated as the tenant's leased area divided by the total leasable area of the property.
For example: a 3,000 square foot tenant in a 30,000 square foot retail center has a 10 percent pro rata share. If annual CAM is $150,000, that tenant's share is $15,000, or roughly $1,250 per month.
Most leases estimate CAM at the start of each year, tenants pay monthly estimates, and the landlord reconciles actual expenses against estimated payments at year-end. If actual costs exceeded estimates, tenants owe the difference. If actual costs came in below, tenants get a credit.
Understanding what is common area maintenance at the mechanical level explains why CAM disputes are common. The difference between estimated and actual CAM can be significant, and disputes over what should have been included, allocated, or reconciled create ongoing friction.
Controllable vs. Uncontrollable CAM
An important distinction. CAM expenses fall into two categories:
Controllable CAM. Items the landlord has some ability to manage, like janitorial services, landscaping contracts, and management fees. Tenants often negotiate caps on the annual increase in controllable CAM (typically 3 to 5 percent) to limit exposure.
Uncontrollable CAM. Items largely outside landlord control, like utility costs, insurance premiums, and property taxes (though these are technically separate from CAM in triple net structures). Caps rarely apply to uncontrollable items.
Sophisticated tenants review CAM provisions carefully to understand what's controllable, what's capped, and what pass-throughs they're actually accepting.
Why CAM Matters for Property Valuation
Here's where CAM connects directly to what a property is worth.
For income properties, valuation depends on net operating income. CAM structure affects NOI in two ways.
Recovery ratio. How much of the property's operating expenses actually get passed through to tenants (versus absorbed by the landlord) affects the landlord's net cash flow. A property with strong 100 percent recovery of controllable CAM produces higher NOI than a comparable property recovering only 85 percent.
Vacancy exposure. When space is vacant, the landlord absorbs the CAM that would otherwise be passed through. Properties with high vacancy carry more CAM burden on the landlord's books, reducing NOI.
For appraisers analyzing a commercial property, understanding what is common area maintenance and how it flows through the specific leases is essential to producing a defensible commercial real estate appraisal. Two properties with identical gross rents can have meaningfully different NOI (and value) if their CAM structures differ.
Why Hawaii CAM Deserves Special Attention
Hawaii's commercial market creates several CAM-specific considerations.
Elevated operating costs. Hawaii consistently runs higher property costs than most mainland markets. Utility costs, insurance premiums, and services all price higher, which puts pressure on total CAM figures. Tenants and landlords both need to plan for and negotiate around these realities.
Insurance market pressures. Hawaii's property insurance market has tightened significantly in recent years, particularly for coastal properties. When insurance is treated as part of the operating expense pass-through, tenants can experience meaningful CAM increases year over year. Communicating and managing this dynamic matters for both retention and negotiation.
Leasehold and fee simple interactions. When a property sits on leased land, the ground rent obligations owed to the landowner flow through to operating economics. Depending on lease structure, some of this cost may reach tenants via CAM-related pass-throughs, others may not.
Tourism-driven property types. Waikiki retail, resort centers, and hospitality-adjacent properties often have unique CAM considerations tied to visitor traffic (extended hours, higher security, additional cleaning, tourist-focused signage and amenities).
For all these reasons, what is common area maintenance in Hawaii's context requires local expertise to analyze and negotiate correctly.
What Owners and Tenants Should Take Away
A few practical points.
Read the CAM provisions carefully. Both landlords drafting leases and tenants signing them should understand exactly what's included, what's excluded, and how allocation works.
Reconcile actual expenses. Landlords should provide accurate annual reconciliations. Tenants should review them and question significant discrepancies. Both sides benefit from transparency.
Consider CAM in valuation. For owners, capturing all recoverable CAM in NOI supports higher property value. For buyers, verifying that reported CAM recovery is realistic and sustainable matters for defensible underwriting.
Address vacancy impact. Vacant space carries CAM burden. Owners need strategies to backfill vacant units and manage the CAM absorption impact until they do.
Get expert appraisal input. When CAM structure materially affects valuation (which is most commercial properties), working with an appraiser who understands lease-level analysis produces a much more defensible number.
The Bottom Line
So, what is common area maintenance? It's the operating cost of maintaining the shared spaces of a commercial property, typically passed through to tenants as part of triple net or modified gross lease structures. It's one of the three components (along with property taxes and insurance) of the "nets" in a triple net lease.
For Hawaii commercial property owners and tenants, CAM directly affects both operating economics and property valuation. Elevated Hawaii operating costs, insurance market pressures, and unique property types make CAM analysis particularly consequential locally.
Whether you need commercial property valuation, litigation support, lease-level analysis, or property tax appeal support, The Benavente Group is ready to deliver the expertise your assignment demands. Our MAI- and SRA-designated appraisers have delivered defensible valuations across Hawai'i, Guam, Saipan, the Marshall Islands, and the wider Pacific since 2017.
