If you have looked at a shop, warehouse or office space in Orange County lately, you have seen the letters NNN next to the rent. That one quoted number is rarely what you actually pay each month. Here are the five questions I hear most about triple net leases, answered with real 2026 numbers.
What is a triple net (NNN) lease and what does the tenant pay?
A triple net lease means you pay base rent plus your share of the building's three "nets": property taxes, building insurance and common area maintenance (CAM). The landlord passes those operating costs through to you, usually as a monthly estimate that gets reconciled once a year.
Property taxes cover the bill on the parcel, including any special assessments. Insurance covers the landlord's property and liability policy for the building. CAM covers shared areas and systems: parking lot, landscaping, lighting, roof and structure in many leases, plus a management fee in some. Your share is normally your square footage divided by the total building or center, so a 3,000 square foot unit in a 30,000 square foot center pays 10 percent. NNN leases tend to run longer than other lease types, often 5 to 10 years or more for a business tenant, with annual rent increases of about 2 to 3 percent or tied to CPI. In exchange for taking on those costs, the base rent is usually lower than a gross lease on the same space. What is and is not passed through is decided by the lease itself, not by a state formula, which is why the wording matters so much.
How much do NNN charges add to the rent in Orange County?
Expect NNN charges to add several dollars per square foot per year on top of the quoted rent, and treat the advertised number as the starting point, not the total. The only way to know your real cost is to ask the landlord for the last three years of actual taxes, insurance and CAM per square foot.
Here is where quoted rents sit. CBRE reports that Orange County industrial space averaged 1.49 dollars per square foot per month NNN in the second quarter of 2026, down 3.9 percent from the first quarter, with vacancy at 5.5 percent, the highest in 20 years. Orange County retail averaged 2.55 dollars per square foot per month NNN, flat for the quarter, with availability at 3.7 percent, matching the lowest level on record. Those two numbers tell different stories: industrial tenants have more room to negotiate right now, while retail space in good trade areas is still tight. To see how the nets change the picture, take a 3,000 square foot retail unit at 2.55. That is 7,650 dollars a month in base rent. If the nets come to 0.70 dollars per square foot per month, which is an assumption for this example and not a quote, you add 2,100 dollars and your real cost is 9,750 dollars a month, or 3.25 per square foot. The nets also move: a building sale can reset the property tax, and an insurance renewal can jump in a single year.
What is the difference between NNN, modified gross and full service leases?
The difference is who carries the operating costs. In a NNN lease you pay them separately, in a full service gross lease the landlord includes them in one rent number, and a modified gross lease splits the difference.
Full service gross is common in Orange County office buildings and gives you the most predictable monthly cost, though the rent is higher to cover what the landlord pays. NNN is the standard for industrial and most retail space, with the lowest base rent and the most cost variability for you. Modified gross sits in between: the rent typically includes some expenses, often a base year of taxes, insurance and CAM, and you pay increases above that baseline. Neither structure is better in the abstract. A tenant who needs a steady budget may prefer gross even at a higher rent, and a tenant who is comfortable tracking expenses can often save money under NNN. When you compare two spaces, convert both to the same all-in cost per square foot per month, because 2.55 NNN and 3.10 full service are not as far apart as they look.
What should a tenant negotiate in an NNN lease in California?
Negotiate the pass-through terms as hard as you negotiate the rent: a cap on controllable CAM increases, a clear audit right, and a written list of what the landlord cannot charge you for. In California, general commercial tenants have little statutory protection, so the lease is your protection.
These are the points I look at first. Caps: a limit on year over year increases for controllable expenses such as landscaping and janitorial, with taxes and insurance usually excluded from the cap. Audit rights: the ability to review the landlord's records after the annual reconciliation, usually within 30 to 90 days of the statement, with the landlord paying for the audit if the overcharge crosses a set threshold such as 5 percent. Exclusions: capital improvements, landlord overhead, original construction defects and costs for other tenants' spaces. Allocation: how your pro rata share is calculated and whether it changes when the building changes. Management fee: whether one is charged on top of CAM and at what percentage. Also ask who is responsible for the roof, structure and HVAC replacement, since a single large repair can dwarf a year of ordinary CAM. Very small tenants have extra help under California SB 1103, effective January 1, 2025. It covers microenterprises (five or fewer employees), restaurants with fewer than 10 employees and nonprofits with fewer than 20. For those tenants, a landlord must provide documentation of building operating costs within 30 days of a written request, cannot change the cost allocation formula to raise your share without written notice and support, and must give 30 days notice for rent increases of 10 percent or less and 90 days for larger ones. Have a real estate attorney review any lease before you sign.
Is buying an NNN property a good investment in Orange County?
It can be, if you want income with few landlord duties, but the return depends on the tenant's strength and the lease term more than on the building. In the second quarter of 2026, The Boulder Group reported an average single tenant net lease cap rate of 6.82 percent nationally, with retail at 6.60 percent, industrial at 7.25 percent and office at 7.90 percent.
Because the tenant pays taxes, insurance and maintenance, the owner's income is closer to the base rent, which is why lenders and buyers like these deals. Cap rates tend to run lower for investment grade tenants on long leases and higher for local tenants on short ones, so a higher number is usually a risk signal, not a bargain. Orange County prices are above the national average, so local cap rates for good locations are generally lower than the national figures, and you should compare any deal to your borrowing cost before assuming the leverage helps you. Prop 13 matters on both sides of the table. When a commercial property sells, the assessed value is reset to the purchase price and then limited to 2 percent increases a year, and in an NNN lease the tenant pays that tax. A buyer who pays a high price creates a higher tax bill for the tenant, and a tenant who signs before a sale should ask what the lease says about reassessment. Check the remaining lease term, the tenant's financials, the rent escalations and who handles the roof and structure before you make an offer. Most Orange County commercial deals are written on AIR CRE forms.
An NNN lease is neither good nor bad. It is a trade of lower base rent for more responsibility, and the details decide whether the trade works for you. If you are leasing, buying or selling commercial space in Orange County or the Inland Empire, I would be glad to walk through the numbers with you. Call me at (323) 320-1725 or visit kinitherealtor.com.
This article is general information, not tax, legal or lending advice. Confirm your specific situation with your CPA, attorney and lender.
Uthpala Kinivita, Kini The Realtor, Century 21 Affiliated, Cal DRE #02343809