Quick answer: A NNN lease (pronounced "triple net") is a commercial lease in which the tenant pays — on top of base rent — the three "nets": property taxes, building insurance, and maintenance. For the owner, that means predictable, nearly hands-off income, because the operating costs and most of the surprises belong to the tenant. In Southern California in 2026, NNN properties are in unusual demand: retail investment sales across the region jumped 62% in the first half of the year, national single-tenant net-lease cap rates are compressing for the first time since 2022, and a wave of local apartment owners — squeezed by rent caps, rising insurance, and Los Angeles's Measure ULA transfer tax — are using 1031 exchanges to trade management-heavy buildings for NNN assets that mail them a check.
I've brokered Southern California commercial real estate for more than two decades, and I have never seen more of my investor conversations start with the same sentence: "I want income, but I'm done being a landlord." A NNN lease is the cleanest answer to that sentence. Here's how it works and what the current data says.
NNN Lease Meaning: The Three "Nets" Explained
In commercial real estate, leases are defined by who pays the property's operating expenses. A triple net (NNN) lease pushes three categories of cost to the tenant:
- Net #1 — Property taxes. The tenant reimburses (or directly pays) the real estate taxes on the property, including special assessments.
- Net #2 — Insurance. The tenant covers the premiums for property and liability insurance on the building.
- Net #3 — Maintenance (CAM). The tenant pays for upkeep — common area maintenance, repairs, landscaping, parking lot, trash, and in many single-tenant deals, even the roof and structure.
The tenant pays a base rent plus its share of those three nets. So a retail space quoted at "$3.00 per square foot NNN" might really cost the tenant about $3.75–$4.00 per square foot per month once taxes, insurance, and CAM are added — while the owner's $3.00 arrives largely untouched by operating costs.
Most NNN leases are long-term (10–20 years, often with renewal options) and signed by a single tenant occupying the whole building — think drive-thru QSRs, pharmacies, auto parts stores, dollar stores, gas/convenience, urgent care, and increasingly car washes and coffee drive-thrus.
NNN vs. Gross vs. Modified Gross: Who Pays What
| Lease Type | Property Taxes | Insurance | Maintenance/CAM | Typical Use |
|---|---|---|---|---|
| Gross (Full Service) | Landlord | Landlord | Landlord | Office |
| Modified Gross (MG) | Shared/negotiated | Shared/negotiated | Shared/negotiated | Office, small industrial |
| Single Net (N) | Tenant | Landlord | Landlord | Rare |
| Double Net (NN) | Tenant | Tenant | Landlord (usually roof/structure) | Retail, industrial |
| Triple Net (NNN) | Tenant | Tenant | Tenant | Single-tenant retail, industrial |
| Absolute NNN | Tenant | Tenant | Tenant — including roof & structure, no landlord obligations at all | Investment-grade single tenants, ground leases |
One caution I give every buyer: "NNN" on a marketing flyer is not a guarantee. Some leases marketed as triple net still leave the roof, structure, or parking lot with the landlord (making them effectively NN). The lease document — not the listing — tells you what you actually own. Reading that lease line by line is a core part of my job before a client writes an offer.
Why Investors Love NNN Leases in Southern California Right Now
1. The great trade: out of apartments, into NNN
Here is the most important local dynamic of 2026, and residential real estate data makes the case plainly.
Over the twelve months ending June 30, 2026, 5,416 residential income properties — duplexes up to apartment buildings — closed escrow across Los Angeles, Orange, Riverside, and San Bernardino counties, at a median price of $1.25 million. Among the roughly 1,700 of those sales that reported a cap rate, the median was just 5.3%.
Think about what that 5.3% buys an income-property owner in 2026: AB 1482 rent caps (5% plus CPI, maximum 10%) and stricter local ordinances, sharply higher insurance premiums since the 2025 wildfires, rising maintenance and labor costs, tenant turnover — and in the City of Los Angeles, Measure ULA, which as of July 1, 2026 takes 4% of the gross sale price above $5.4 million and 5.5% above $10.9 million when they eventually sell.
Meanwhile, the average single-tenant net-lease retail property nationally traded at a 6.45% cap rate as of March 2026 — with zero rent control, zero midnight maintenance calls, and a corporate tenant paying the taxes and insurance. An investor who sells a SoCal apartment building at a low-5s cap and completes a 1031 exchange into a NNN asset can frequently earn a similar or higher yield with a fraction of the management — which is exactly why so many are doing it. (Bonus for LA City owners: exchanging into a NNN property outside city limits means Measure ULA never touches the next sale.)
2. SoCal retail investment is surging
Investors as a group have noticed. Retail investment sales in Los Angeles, Orange, Ventura, and the Inland Empire hit $3.52 billion in the first half of 2026 — up 62% from the same period in 2025 — as buyer and seller pricing expectations finally realigned. The underlying real estate is healthy too: overall LA/OC retail vacancy sits near 5.9% with average asking rents around $2.36 per square foot triple net, and Orange County's retail availability is just 3.9%, held down by strong tenant demand and virtually no new construction. Scarce, well-located, income-producing buildings are precisely what NNN buyers want.
3. Cap rates have started compressing — the window matters
After roughly three years of rising cap rates (falling prices), national net-lease data turned in early 2026: the average single-tenant retail cap rate tightened to 6.45% in March, down about 34 basis points from its late-2025 peak, with premium QSR and convenience assets already trading in the low-4s to low-5s. When cap rates compress, prices rise. Buyers who move earlier in that cycle lock in more yield; sellers of NNN assets are regaining pricing power. Either way, 2026 is a moment where timing and preparation are worth real money.
4. California's Prop 13 quirk actually helps NNN owners
Under Proposition 13, a property's assessed value resets to the purchase price when it sells — which means property taxes typically jump the year after you buy. In a gross lease, that increase is the landlord's problem. In a NNN lease, the tenant pays the reassessed taxes. For out-of-area investors buying in high-value Southern California, that single clause removes one of the state's biggest ownership surprises.
What Commercial Deals Actually Look Like Here: The Numbers
Most institutional net-lease trades happen off-market, but regional MLS data captures the private-investor market — the $700K to $5M deals where most 1031 buyers actually live. In the twelve months ending June 30, 2026, 918 commercial properties closed escrow across the four core SoCal counties:
| County | Closed Commercial Sales | Median Sale Price | Median Days on Market |
|---|---|---|---|
| Los Angeles | 507 | $1,200,000 | 61 |
| San Bernardino | 190 | $700,000 | 91 |
| Riverside | 120 | $870,000 | 95 |
| Orange | 101 | $1,575,000 | 64 |
Source: regional MLS closed commercial sales, July 1, 2025 – June 30, 2026. Listed transactions only.
Two practical takeaways. First, entry points are wider than people assume: the Inland Empire's median commercial sale is well under $1 million, which is why I often show 1031 clients Riverside and San Bernardino county inventory they didn't know existed. Second, commercial properties take 2–3 months to sell even in a strong market — a 1031 exchange, with its rigid 45-day identification and 180-day closing clock, punishes buyers who start looking the day their apartment building closes. The identification list should be built before you sell.
A recent example
In one recent transaction, I represented a 1031 exchange buyer on the purchase of a $5,000,000 single-tenant NNN retail investment in Ontario — a 4,890 SF building at a 5.3% cap rate. The buyer traded out of a management-intensive asset and into a corporate-backed lease where the tenant handles taxes, insurance, and maintenance. That deal, in one sentence, is the trend this article describes.
The Honest Risks of NNN Investing
NNN is low-management, not no-risk. Before any client buys, we underwrite four things:
- The tenant, not just the building. A NNN lease is only as good as the credit behind it. A corporate guarantee from an investment-grade parent is a different asset than a franchisee LLC with one location, and the market prices them 150–300 basis points apart for a reason.
- The re-tenanting story. If the tenant leaves in year 12, what is the building worth empty? Strong hard corners with signalized access and flexible buildings re-lease; oddly configured single-purpose buildings can sit dark.
- Rent escalations vs. inflation. Many older NNN leases carry flat rent for 10+ years or 1% annual bumps. In an inflationary decade, flat rent is a quiet pay cut. We hunt for leases with 10% bumps every five years or better.
- The actual lease language. As covered above — confirm the roof, structure, and parking lot are truly the tenant's obligation before you rely on "NNN" in a flyer.
Frequently Asked Questions
What does NNN mean in commercial real estate? NNN stands for "triple net." It's a lease where the tenant pays the three "nets" — property taxes, building insurance, and maintenance — in addition to base rent. The landlord receives income with minimal operating expenses or management responsibility.
Who pays property taxes in a NNN lease? The tenant. In California this matters more than in most states, because Proposition 13 reassesses a property at its sale price when it changes hands — and under a NNN lease, that post-sale tax increase is the tenant's cost, not the new owner's.
Is a NNN lease good for the tenant or the landlord? Both, in different ways. Landlords get predictable, low-management income. Tenants take on the operating costs but typically pay a lower base rent, control their own space, and lock in long-term occupancy — which is why national brands sign 10–20 year NNN leases voluntarily.
What is a typical cap rate for NNN properties in Southern California in 2026? Nationally, average single-tenant net-lease retail traded around a 6.45% cap in early 2026, with premium investment-grade tenants (top QSR and convenience brands) in the low-4% to low-5% range. Well-located Southern California assets generally trade at the tighter end of those ranges, reflecting the region's land values and tenant demand. Tenant credit, lease term, and location drive the spread.
Can I do a 1031 exchange from an apartment building into a NNN property? Yes. All real property held for investment is "like-kind" — a fourplex or 20-unit building can exchange into a single-tenant NNN retail building. You have 45 days from your sale to identify replacement properties and 180 days to close, so the NNN search should start before your apartment sale closes. (Note: a 1031 defers capital gains taxes, but it does not avoid LA's Measure ULA transfer tax on the property you're selling.)
How much do I need to buy a NNN property in Southern California? More range than most investors expect. Trophy corporate deals run $4M–$10M+, but the median MLS-listed commercial sale over the last year was about $700,000 in San Bernardino County, $870,000 in Riverside County, and $1.2 million in Los Angeles County. Smaller net-leased and multi-tenant retail exists at nearly every price point above ~$1M — and strong deals at those prices move quickly.
What's the difference between NNN and absolute NNN? In a standard NNN lease the landlord may retain a few obligations (commonly roof and structure). In an absolute NNN lease — typical of investment-grade tenants and ground leases — the tenant is responsible for literally everything, including roof, structure, and rebuilding after a casualty. Absolute NNN is the closest thing real estate has to a corporate bond with a deed attached.
Talk to a Southern California NNN Specialist
I'm Jeff Wiggins, Senior Commercial Advisor with Coldwell Banker Commercial Realty and a member of the International Diamond Society (top 12% of Coldwell Banker agents worldwide). For over 20 years I've represented buyers and sellers of retail, industrial, office, and multifamily investments across Greater Los Angeles, Orange County, the San Gabriel Valley, and the Inland Empire — including NNN acquisitions, dispositions, and 1031 exchanges from start to finish.
If you're weighing a sale, an exchange, or your first net-lease purchase, the right time to build the strategy is before the clock starts. Deals get done when the broker is genuinely prepared.
Jeff Wiggins | Senior Commercial Advisor | CalRE #01754343 Coldwell Banker Commercial Realty 📞 626.278.7745 | ✉️ jeff.wiggins@cbcnrt.com 🌐 jeffwrealestate.com
Local market data in this article comes from residential closed-sale records for July 1, 2025 through June 30, 2026, covering Los Angeles, Orange, Riverside, and San Bernardino counties; figures reflect listed transactions only and use medians to limit the influence of outlier sales. Reported cap rates reflect figures disclosed at sale and are a subset of all transactions. Regional investment volume and vacancy figures are from published 2026 brokerage and industry research (NAI Capital via Commercial Observer; Kidder Mathews; national net-lease cap rate surveys). Data is deemed reliable but not guaranteed, and markets change quickly. This article is general information, not tax, legal, or investment advice — consult your tax professional regarding 1031 exchanges, Measure ULA, and Proposition 13.