A Plain-English Guide to Commercial Real Estate Terms
If you have ever looked at a commercial lease and felt like you were reading a different language , you are not alone. Most business owners, first-time investors, and even experienced entrepreneurs encounter commercial real estate terms that never get properly explained. They sign leases without fully understanding what they have agreed to, or they pass on good opportunities because the language feels too complicated.
This guide fixes that. No law school terminology. Just plain English explanations of the terms you are most likely to encounter when leasing, buying, or investing in commercial real estate in Charlotte and the Carolinas.
NNN — Triple Net Lease
This is the one that causes the most confusion.
According to NavPoint Real Estate, an NNN or Triple Net lease means the tenant pays a base rent plus three additional categories of expenses — property taxes, building insurance, and Common Area Maintenance, commonly referred to as CAM. The three "nets" are those three expense pass-throughs.
When you see a commercial space advertised as "$25/SF NNN," that $25 is the base rent only. According to The Cauble Group's 2026 lease structure guide, tenants typically pay an additional $5 to $15 per square foot for taxes, insurance, and CAM on top of that base rate, depending on the asset class and market. So a space quoted at $25/SF NNN might actually cost you $35 to $40 per square foot all-in.
According to The Cauble Group, NNN is the dominant lease structure in retail, single-tenant net lease, industrial, and most newer multi-tenant office properties. If you are looking at commercial space in Charlotte right now, there is a very high chance the lease will be structured this way.
What this means for you as a tenant: Your monthly payment has two parts, the base rent and the NNN charges. The NNN portion can fluctuate year to year as property taxes and maintenance costs change.
What this means for you as a landlord or investor: Your net operating income is more predictable because most operating expenses are passed through to the tenant rather than absorbed by you.
CAM Charges — Common Area Maintenance
CAM charges are one part of the NNN equation, and one of the most misunderstood line items in any commercial lease.
According to The Motley Fool, CAM charges are the costs of maintaining shared spaces that all tenants use: parking lots, lobbies, landscaping, exterior lighting, hallways, and restrooms. According to the National Association of Realtors, the most common way CAM charges are calculated is by determining each tenant's pro rata share of square footage in the property. Each tenant pays their proportionate share of the property's total CAM expenses based on how much space they occupy relative to the whole building.
According to Wiss, a financial and advisory firm, CAM charges under NNN leases operate on an estimate-and-true-up cycle. Landlords collect monthly estimates based on a budgeted amount, then reconcile those estimates against actual expenses at year-end. If the landlord spent more than estimated, the tenant owes the difference. If the landlord spent less, the tenant receives a credit.
What this means practically: Always ask for a CAM estimate before signing. The base rent is not your total monthly cost. A $3,000/month base rent with $800/month in CAM and NNN charges becomes a $3,800/month real cost. Know this number before you commit.
Cap Rate — Capitalization Rate
If you are evaluating a commercial real estate investment, this is the number you will hear most often.
The cap rate is the ratio of a property's net operating income to its purchase price. If a property generates $100,000 in annual net operating income and sells for $1,250,000, the cap rate is 8%. A lower cap rate generally means a higher-quality, lower-risk asset in a stronger market. A higher cap rate may indicate higher risk or a less competitive location — but also potentially higher returns.
In Charlotte's current market, well-located retail and industrial assets are trading at cap rates that reflect the city's strong fundamentals. According to CBRE's 2026 Investor Intentions Survey, Charlotte ranked fifth in North America for commercial real estate investment demand — which directly compresses cap rates on quality assets as more capital competes for the same properties.
What this means for you: If you are comparing investment opportunities, compare cap rates within the same asset class and submarket. A 7% cap rate on a Charlotte retail center and a 7% cap rate on a rural office building are not the same risk profile.
TI Allowance — Tenant Improvement Allowance
This is money the landlord gives you to build out your space. It is one of the most negotiable items in any commercial lease — and one that most tenants never ask for.
TI allowances are typically quoted in dollars per square foot. A $30/SF TI allowance on a 2,000 SF space means the landlord contributes $60,000 toward your buildout. You are responsible for any costs above that amount.
The size of the TI allowance a landlord is willing to offer depends on market conditions, the length of your lease, and your creditworthiness as a tenant. In a market like Charlotte where quality tenants are in demand, negotiating for a meaningful TI allowance is often more achievable than tenants realize — especially in new construction or recently renovated spaces.
Letter of Intent (LOI)
Before a formal lease is signed, most commercial real estate deals begin with a Letter of Intent. An LOI is a non-binding document that outlines the basic terms both parties have agreed to in principle ,rent, lease term, TI allowance, commencement date, and any other key deal points.
An LOI is not a lease. It does not legally bind either party to complete the transaction. But it serves as the framework that the formal lease is built around — and it is often the most important negotiating document in the entire process. Terms agreed to in the LOI are very difficult to renegotiate once a formal lease is being drafted.
This is one of the reasons having experienced representation at the LOI stage matters so much. What gets agreed to early tends to stick.
Working With a Team That Knows These Terms Inside Out
Understanding these terms is the first step. Applying them correctly in a real negotiation, knowing what to ask for, what to push back on, and what the market actually supports right now, is where experience makes the difference.
Legacy Real Estate Advisors has been representing tenants, landlords, investors, and developers across Charlotte and the Carolinas since 2006."In March 2025, Legacy Real Estate Advisors was honored with the CoStar Impact Award for Lease of the Year, awarded by a panel of over 630 commercial real estate professionals across 129 markets. The award recognized the landmark 64,000 SF headquarters relocation lease secured for R.E. Mason at Three Resource Square in University Research Park, one of the most significant office transactions in Charlotte's 2024 commercial real estate landscape.
If you are evaluating a lease, considering a commercial purchase, or simply trying to understand what you are being asked to sign ,our brokers work directly with clients from first conversation to closing.