A full service office lease generally bundles many building operating expenses into the rent instead of requiring the tenant to pay each expense separately.
Depending on the lease, those expenses may include property taxes, building insurance, common-area maintenance, utilities, janitorial service and property management.
But there is one rule every business should understand:
“Full service” does not automatically mean “everything is included.”
Electricity, after-hours HVAC, internet, parking, tenant insurance, improvements, excess utility usage and increases in building operating expenses may still be charged separately.
Commercial lease terminology is also not perfectly standardized. A lease marketed as “full service” may still contain base-year pass-throughs, utility charges, expense stops or other separately billed costs.
So the safest way to interpret the term is:
Treat “full service” as a description of the lease structure, not a guarantee that the quoted rent is your final monthly cost.
The actual lease determines what your business pays.
Full-Service Office Lease: The Quick Answer
A typical full-service office lease may handle expenses roughly like this:
| Expense | Usually Included? | Important Caveat |
| Base rent | Yes | Scheduled rent increases may apply |
| Property taxes | Usually | Increases above a base year may pass through |
| Building insurance | Usually | Tenant business insurance remains separate |
| Common Area Maintenance | Usually | Verify the actual lease structure |
| Common-area utilities | Usually | Suite electricity may be separate |
| Standard HVAC | Often | After-hours HVAC may cost extra |
| Janitorial service | Often | Confirm whether tenant-suite cleaning is included |
| Property management | Usually | Generally part of building operations |
| Common-area repairs | Usually | Tenant-specific repairs may be treated differently |
| Landscaping / snow removal | Often | Depends on the property |
| Internet / telecom | Usually not | Typically arranged by the tenant |
| Furniture | Usually not | Unless the suite is specifically furnished |
| Tenant improvements | Depends | May be negotiated with the landlord |
| Parking | Depends | Free at some properties, charged at others |
American Bar Association guidance distinguishes a true gross or full-service lease, where operating costs are incorporated into rent, from other office structures that pass certain increases back to tenants. In practice, office leases can contain many variations, so the written agreement matters more than the label.
“Usually included” does not mean “included in your specific lease.”
How Does a Full-Service Office Lease Work?
Under a traditional full-service structure, the landlord manages the property and pays many recurring costs associated with operating the building.
Instead of separately administering expenses for items such as:
- real estate taxes
- building insurance
- common-area maintenance
- landscaping
- elevators
- common utilities
- janitorial service
- building management
the tenant pays a rental rate designed to incorporate many of those costs.
For a business, the main benefit is straightforward:
Fewer separate building expenses to manage and potentially greater budgeting simplicity.
However, that simplicity can have another layer.
Many office leases allow the landlord to pass through increases in operating expenses or taxes above an agreed baseline, commonly called a base year.
That is where tenants can encounter additional charges even when the lease is described as full service.
What Is Actually Included in a Full-Service Office Lease?
Exact inclusions vary, but these are the major expense categories businesses should investigate.
1. Property Taxes
Real estate taxes on the building are commonly part of the landlord’s operating expenses under a full-service structure.
However, your rent may incorporate those taxes only up to a defined baseline.
If property taxes increase during the lease, some or all of your proportionate share of that increase may be passed through depending on the agreement.
So when somebody says:
“Property taxes are included.”
ask:
“Are future tax increases also included?”
Those are not necessarily the same thing.
2. Building Insurance
The landlord’s building insurance is commonly treated as a property operating expense.
That does not mean your company has no insurance obligations.
Tenants may still need coverage such as:
- commercial general liability
- insurance covering business property and equipment
- workers’ compensation
- other policies required under the lease
The landlord protects the building and its interests.
Your business still needs to protect itself and satisfy its contractual insurance obligations.
3. Common Area Maintenance
CAM stands for Common Area Maintenance.
Depending on the building and lease, common-area expenses may relate to areas and services such as:
- lobbies
- hallways
- elevators
- shared restrooms
- landscaping
- parking areas
- exterior grounds
- snow removal
- common building systems
In a traditional full-service gross structure, many of these expenses are incorporated into the rent.
But lease terminology is not uniform.
If a proposal separately mentions CAM, operating expenses or additional rent, ask exactly how those charges interact with the advertised rental rate.
4. Utilities
Utilities are one of the easiest areas to misunderstand.
A lease might include some combination of:
- common-area electricity
- water
- gas
- heating
- cooling
- standard building HVAC
But electricity consumed inside your individual suite may be:
- separately metered
- submetered
- allocated among tenants
- included only up to standard usage
- separately reimbursed
A small professional office and a technology company with substantial servers can have very different electrical requirements even if both occupy the same square footage.
Instead of simply asking:
“Are utilities included?”
ask:
“Is electricity used inside our suite included in the quoted rent, and if not, how is it calculated?”
That question is much harder to misunderstand.
5. HVAC During Normal Business Hours
Standard heating and cooling during normal building hours may be included.
After-hours HVAC is a different question.
Suppose standard building HVAC ends at 6:00 p.m., while your company regularly works until 10:00 p.m.
Additional HVAC service may need to be requested and separately charged.
This matters especially for:
- companies operating across time zones
- technology businesses
- call centers
- weekend operations
- server-intensive businesses
- teams with extended working hours
Before signing, ask for:
Standard HVAC hours
and:
Any after-hours HVAC charge
6. Janitorial and Cleaning Services
Janitorial service may be included in a full-service office arrangement, but the scope matters.
Confirm whether cleaning applies to:
Common areas only
or:
Common areas plus your individual office suite
Also ask about frequency and exactly which services are provided.
Those might include:
- trash removal
- vacuuming
- restroom cleaning
- common-area cleaning
- tenant-suite cleaning
- consumable supplies
- special cleaning
“Janitorial included” is not detailed enough for budgeting.
7. Property Management and Building Maintenance
Another practical benefit of a multi-tenant full-service office building is that management generally coordinates many shared building functions.
Those can include:
- elevators
- common-area repairs
- building systems
- exterior maintenance
- grounds
- shared facilities
- vendor coordination
For a business that does not want employees spending time dealing with building operations, that can have real operational value.
But distinguish building maintenance from tenant-specific repairs caused by your equipment, alterations or operations.
The lease should define that boundary.
What Is Usually Not Included?
Understanding exclusions can be even more important than understanding the list of typical inclusions.
Internet and Telecom
Internet service is generally a tenant business expense unless specifically included.
Businesses may need to arrange:
- internet service
- Wi-Fi
- phone systems
- dedicated fiber
- backup connectivity
- networking hardware
A building being wired for high-speed service does not necessarily mean the service subscription itself is included.
Tenant Business Insurance
Building insurance and tenant insurance serve different purposes.
Even if the landlord pays the building’s insurance costs, your company may still be required to maintain its own liability and business-property coverage.
Furniture
The term “full service” describes lease economics and building operations.
It does not automatically mean desks and chairs come with the space.
Furniture is generally tenant-provided unless the suite is specifically marketed or leased as furnished.
Tenant Improvements and Build-Out
Suppose an existing suite has six private offices, but your business needs three offices and a large training room.
Someone must pay to reconfigure the space.
That cost may be:
- paid by the landlord
- paid by the tenant
- partially funded through a tenant improvement allowance
- amortized into the rent
- handled through another negotiated arrangement
A tenant improvement allowance, or TI allowance, is generally a negotiated landlord contribution toward approved improvements to the leased space.
Never assume the landlord will automatically pay for every requested change.
After-Hours HVAC
Normal HVAC may be included while after-hours service is separately charged.
If employees frequently work outside standard building hours, estimate this expense before choosing a property.
Separately Metered or Excess Electricity
Companies with heavier power consumption should pay particular attention to electricity provisions.
Examples include businesses operating:
- server equipment
- specialized technology
- high-powered workstations
- supplemental cooling
- specialized office equipment
Parking
Parking varies widely from property to property.
It may be:
- included
- free but unreserved
- allocated
- reserved for an additional fee
- charged per vehicle
Parking costs can materially affect occupancy cost for larger teams.
Specialty Services
A full-service lease normally does not make the landlord responsible for every service your business chooses to use.
Potential examples include:
- private security
- specialized waste disposal
- dedicated generators
- supplemental HVAC
- tenant-specific storage
- specialized cleaning
- tenant-owned equipment
What Is a Base Year?
A base year is a benchmark used to determine the level of certain building operating expenses incorporated into the original lease economics.
Suppose your lease begins in 2026.
The agreed base year’s operating expenses are used as the starting point.
If eligible expenses increase later, your lease may require you to pay some portion of the increase above that baseline.
ABA guidance notes that office leases commonly use this type of base-year mechanism for operating expenses and real estate taxes.
Simple Base-Year Example
Assume:
Base-year operating expenses: $10/SF
The following year’s expenses become:
$11.20/SF
Increase:
$1.20/SF
Your company leases:
5,000 SF
A simplified calculation would be:
5,000 × $1.20 = $6,000 per year
or:
$500 per month
The actual amount depends on the calculation method contained in the lease.
The lesson is important:
“Full service” does not necessarily mean operating expenses can never affect your payment.
What Is an Expense Stop?
An expense stop establishes a level of operating expense the landlord agrees to absorb before additional expense responsibility shifts according to the lease.
For example, suppose the lease contains an expense stop of:
$10/SF
If qualifying operating expenses later rise to:
$11/SF
the lease may make the tenant responsible for some or all of the difference.
CBRE describes expense stops as negotiated mechanisms commonly used in U.S. gross office leases to determine when the landlord stops absorbing certain operating-cost increases.
Base Year vs. Expense Stop
Base year: Uses expenses incurred during a specified year as the benchmark.
Expense stop: Uses a stated expense threshold as the benchmark.
From the tenant’s perspective, the key question is similar:
At what point can changes in building operating expenses increase what we pay?
What Is a Tenant’s Proportionate Share?
Many multi-tenant leases allocate certain expenses based on a tenant’s proportionate share.
The calculation can involve the rentable area leased by the tenant relative to an agreed building area or applicable expense pool.
For example, if a tenant occupies a certain percentage of the relevant rentable area, the lease may use that percentage when allocating eligible expenses.
The exact formula, denominator, exclusions and adjustments matter.
Ask:
How is our proportionate share calculated, and which square-footage figure is used?
Do not assume every landlord calculates it identically.
What Does “Grossed Up” Mean?
Operating expenses do not always stay the same when a building’s occupancy changes.
Some expenses, such as certain utilities or janitorial costs, can be lower when a building has substantial vacancy.
If a low-occupancy year were used without adjustment as a base year, future occupancy increases could make normal operating costs appear to have risen dramatically.
A gross-up provision adjusts qualifying variable expenses to estimate what those expenses would have been at an agreed occupancy level.
ABA guidance specifically discusses grossing up variable operating expenses when using base-year office lease structures so that occupancy fluctuations do not unfairly distort the comparison.
When reviewing a lease, ask:
Are operating expenses grossed up?
Which expenses qualify?
What occupancy assumption is used?
What Does “Additional Rent” Mean?
Do not assume the word rent refers only to base rent.
Commercial leases may classify other tenant obligations as additional rent.
Depending on the agreement, additional rent may include items such as:
- operating-expense increases
- tax increases
- electrical charges
- utility reimbursements
- after-hours HVAC
- late charges
- other reimbursable expenses
A very useful question during lease review is:
Besides Base Rent, what amounts can be billed to us as Additional Rent?
That question often reveals the true economic structure much more clearly than asking whether the lease is “full service.”
Full-Service vs. Modified Gross vs. Triple Net Lease
Here is a simplified comparison.
| Expense | Full-Service Gross | Modified Gross | Triple Net / NNN |
| Base rent | Tenant pays | Tenant pays | Tenant pays |
| Property taxes | Typically incorporated into rent; pass-throughs may apply | Negotiated allocation | Typically tenant responsibility |
| Building insurance | Typically incorporated into rent; lease terms control increases | Negotiated allocation | Typically tenant responsibility |
| CAM | Typically incorporated into rent; verify exclusions | Negotiated allocation | Typically tenant responsibility |
| Utilities | Often bundled with exceptions | Frequently divided | Often tenant responsibility |
| Janitorial | Often landlord-managed | Varies | Often tenant responsibility |
| Expense increases | May pass through | Often pass through | Generally borne by tenant |
| Budget simplicity | Generally higher | Moderate | Generally lower |
| Headline base rate | Can appear higher | Varies | Can appear lower |
This is an illustrative comparison only. Actual commercial leases can allocate expenses differently.
The key principle is:
A $20/SF full-service office should not automatically be compared with a $20/SF NNN office as though the two prices represent the same thing.
Is a Full-Service Lease More Expensive?
The advertised rate can be higher because operating costs are bundled into the lease economics.
But a higher headline rate does not necessarily mean a higher total occupancy cost.
Hypothetical Example
Office A: Full Service
Quoted rate:
$25/SF
Many building operating expenses are incorporated into the price.
Office B: NNN
Base rent:
$18/SF
At first glance, Office B appears significantly cheaper.
Now assume qualifying taxes, insurance and CAM add:
$8/SF
The simplified comparison becomes:
Office A: $25/SF
Office B: $26/SF
The property with the lower advertised base rent would actually have the higher combined amount in this hypothetical example.
That is why businesses should compare:
Estimated total occupancy cost on the same basis
rather than:
Lowest advertised base rent
Why Businesses Choose Full-Service Office Leases
Easier Budgeting
Bundling more operating expenses can make financial forecasting simpler.
Your accounting team may have fewer variable building costs to estimate separately.
Less Building Administration
The landlord or property-management team generally handles many shared building services and vendors.
That allows employees to focus on the company’s actual operations.
Practical for Multi-Tenant Buildings
Elevators, lobbies, shared HVAC systems, landscaping and other facilities benefit multiple businesses.
Central landlord management can be much more efficient than having individual tenants coordinate those services.
Easier Comparison When Inclusions Are Clear
A clearly defined full-service proposal can be easier to evaluate than a low base-rent quote accompanied by numerous uncertain additional charges.
The important phrase is:
when inclusions are clear.
What Are the Potential Downsides?
Higher Headline Rent
A full-service rental rate may initially appear higher than a net-leased alternative because more expenses are incorporated into the rate.
Less Control Over Building Operating Costs
The landlord chooses many vendors and manages the building.
Tenants usually have less direct control over those operating decisions.
Expense Pass-Throughs May Still Apply
A base year, expense stop or other lease mechanism can expose tenants to future increases.
“Full Service” Can Create False Confidence
The biggest practical risk is assuming the label answers every financial question.
A tenant may assume:
“Everything is included.”
and later discover:
- electricity is allocated separately
- after-hours HVAC costs extra
- internet is tenant-paid
- future operating-expense increases pass through
- parking is separately charged
The better approach is to investigate the economics before relying on the terminology.
What Are Operating Expense Reconciliations and Audit Rights?
If a tenant is responsible for certain operating-expense increases, the landlord may collect estimated amounts during the year and later compare those estimates with actual expenses.
That process is commonly referred to as an operating expense reconciliation.
Depending on the result, a tenant might receive a credit for an overpayment or owe an additional amount.
ABA guidance recommends that tenants consider rights to review detailed expense statements and, where negotiated, audit the landlord’s operating-expense calculations.
Before signing, ask:
Will we receive an annual operating-expense reconciliation?
How detailed will it be?
How long do we have to question it?
Does the lease give us audit or review rights?
For a multi-year lease, these provisions can become financially significant.
A Real Example: Full-Service Office Space at 15 Corporate Place South
15 Corporate Place South in Piscataway, New Jersey provides a useful example of why tenants should examine the actual pricing details behind a full-service label.
Current LoopNet information checked in August 2026 identifies the property as office space and lists multiple suites at an advertised $15/SF/YR. The same listing displays $1.25/SF/month, which is the monthly equivalent of $15/SF/year rather than a separate CAM charge:
$15 ÷ 12 = $1.25/SF/month
The listing states that the listed lease rate is plus a proportional share of electrical cost.
This distinction matters.
A tenant should not calculate:
$15/SF/YR + another $1.25/SF/month CAM
from those figures.
Instead, the $1.25/SF/month figure represents another way of expressing the same $15/SF/year base rate on that listing.
Other property-listing platforms contain older or different availability and pricing snapshots, reinforcing the importance of confirming the latest proposal for the exact suite being considered.
For any current 15 CPS proposal, ask:
- What is the current base rental rate for this suite?
- Which expenses are included?
- How is the tenant’s proportional electrical cost calculated?
- Are there operating-expense or tax pass-throughs?
- Are there scheduled base-rent increases?
- What services are included in normal building operations?
- What other amounts can be charged as additional rent?
The broader lesson applies to any commercial property:
The lease economics matter more than the label attached to them.
What Full-Service Building Support Can Look Like at 15 CPS
Current marketing for 15 Corporate Place South describes a multi-tenant office property with three elevators, shared loading access, heavy power, advanced wiring, surface parking and daytime and after-hours custodial service. Current listings also describe move-in-ready or built-out office suites for professional and technology users.
Those features illustrate an important distinction:
Lease structure determines who pays for what.
Building service determines what management provides operationally.
Businesses should evaluate both before deciding whether an office represents good value.
14 Questions to Ask Before Signing a Full-Service Office Lease
Use these questions as a lease-comparison checklist.
1. What exactly is included in base rent?
Get the inclusions in writing.
2. Is CAM incorporated into rent or separately charged?
Do not infer the answer from the phrase “full service.”
3. Are real estate taxes included?
Then ask who pays future increases.
4. Is building insurance incorporated into rent?
Separately confirm your company’s own insurance requirements.
5. Is electricity inside our suite included?
If not, ask how the charge is measured or allocated.
6. Which other utilities are included?
Water, gas, electricity and HVAC may be treated differently.
7. Is janitorial service provided inside our suite?
Ask about frequency and scope.
8. What are the building’s standard HVAC hours?
Then ask how after-hours HVAC is billed.
9. Is there a base year or expense stop?
If yes, understand exactly how it is calculated.
10. How does base rent increase?
A scheduled rent increase and an operating-expense increase are different.
Your lease may contain both.
11. What can be charged as additional rent?
Ask for the actual categories.
12. What expenses remain entirely our responsibility?
Examples may include internet, furniture, parking, insurance and tenant-specific improvements.
13. How is our proportionate share calculated?
Confirm the numerator, denominator and applicable area.
14. Do we have review or audit rights?
Understand how annual operating-expense reconciliations can be reviewed or challenged.
A business that can answer these questions understands far more about its lease than one that only asks:
“What’s the price per square foot?”
Full-Service Lease Cost Comparison Worksheet
When comparing two offices, put every recurring expense on the same basis.
| Cost Item | Office A | Office B |
| Base rent | $_____ | $_____ |
| CAM / operating expenses | $_____ | $_____ |
| Tax pass-through | $_____ | $_____ |
| Insurance pass-through | $_____ | $_____ |
| Electricity | $_____ | $_____ |
| Other utilities | $_____ | $_____ |
| Janitorial | $_____ | $_____ |
| Parking | $_____ | $_____ |
| After-hours HVAC estimate | $_____ | $_____ |
| Internet / telecom | $_____ | $_____ |
| Other recurring charges | $_____ | $_____ |
| Estimated monthly occupancy cost | $_____ | $_____ |
Then compare upfront costs separately:
| One-Time Cost | Office A | Office B |
| Furniture | $_____ | $_____ |
| Build-out | $_____ | $_____ |
| Moving | $_____ | $_____ |
| IT installation | $_____ | $_____ |
| Deposits | $_____ | $_____ |
| Estimated upfront cost | $_____ | $_____ |
Now you are comparing actual economics rather than marketing terminology.
Red Flags to Watch for in a Full-Service Quote
A full-service lease is not inherently risky.
Ambiguous lease economics are the problem.
Pay closer attention when:
The proposal says “full service” but does not list inclusions
Request a written breakdown.
Electricity language is unclear
This is especially important for businesses with significant technology requirements.
The base year is not clearly defined
You should know the baseline against which future increases may be measured.
Operating expenses are broadly defined
Understand which categories the landlord is allowed to include.
Your proportionate-share calculation is unclear
Ask exactly which rentable-area figures determine your share.
After-hours HVAC is not addressed
Extended-hours businesses should determine this before budgeting.
“Additional rent” is broadly defined without explanation
Find out exactly which amounts can be charged.
The headline price is far below alternatives but the exclusions are unclear
A lower rental rate can be a perfectly legitimate deal.
Just make sure the missing cost has not simply moved outside the headline number.
Should a Lawyer or Broker Review a Full-Service Lease?
Commercial leases can create significant multi-year financial obligations.
A commercial real estate attorney can help evaluate the legal obligations created by a lease.
A qualified commercial real estate professional or tenant representative can help evaluate the property’s business and market economics.
This guide can help you understand which questions to ask.
It is not a substitute for professional advice about a specific lease.
Frequently Asked Questions
What is a full service office lease?
A full service office lease is a commercial lease structure in which many building operating expenses are incorporated into the rental economics and generally managed by the landlord.
Typical categories may include property taxes, building insurance, CAM, utilities, janitorial services and property management, but exact inclusions vary.
Does a full-service lease include utilities?
Often some utilities are included, but not necessarily every utility or every type of usage.
Tenant electricity, supplemental power and after-hours HVAC may be separately charged depending on the lease.
Is CAM included in a full-service lease?
CAM is commonly incorporated into traditional full-service gross rent, but actual lease structures vary.
If a proposal mentions separate CAM or operating expenses, review the pricing details instead of assuming they are included.
Does a full-service lease include the internet?
Usually not.
Internet, phones and telecom services are generally tenant business expenses unless specifically included.
Does full service mean rent never changes?
No.
Base rent may increase under scheduled escalations, and some leases also pass through increases in operating expenses or taxes above a base year or expense stop.
What is a base year in a full-service lease?
A base year establishes an operating-expense benchmark.
Depending on the lease, the tenant may become responsible for an agreed share of certain expense increases above that baseline.
What is an expense stop?
An expense stop establishes a stated operating-expense level included in the lease economics.
If eligible costs rise above that level, the tenant may become responsible for some of the increase.
What is a proportionate share?
A proportionate share is a percentage used in some multi-tenant leases to allocate eligible building expenses among tenants.
The exact calculation depends on the rentable areas and methodology defined by the lease.
What is the difference between a full-service and triple-net lease?
A full-service lease generally incorporates more building operating expenses into the rental structure.
Under a triple-net lease, tenants typically pay base rent plus allocated taxes, insurance and common-area maintenance.
That is why a NNN property can advertise a lower base rate without necessarily having a lower total occupancy cost.
Is a full-service office lease good for small businesses?
It can be attractive to businesses that value simpler budgeting and do not want to directly administer multiple building expenses.
Whether it represents the best value depends on the rate, exclusions, expense pass-throughs and services provided.
The Bottom Line: What Does “Full Service” Really Mean?
A full service office lease generally means the landlord manages and pays many recurring building operating expenses while those expenses are incorporated into the lease economics.
Depending on the agreement, that may include some combination of:
property taxes + building insurance + CAM + utilities + janitorial service + property management + building maintenance
But “full service” does not guarantee that your only cost will be the advertised rental rate.
Before signing, answer six questions:
What is included?
What is excluded?
What can increase?
What can be passed through?
What services have usage or time limits?
What will our realistic total occupancy cost be?
Once you know those answers, the words “full service” become useful rather than vague.
Businesses evaluating full-service office space in Piscataway can compare the current availability at 15 Corporate Place South and request the current pricing and lease structure for the specific suite they are considering.
Because availability, rental rates and lease terms can change, always use the current leasing proposal when making a final financial comparison.