A commercial lease is probably the biggest contract most small business owners ever sign, and most sign it after reading it once, quickly, because the landlord has another interested tenant. It’s also very different from an apartment lease. There are far fewer legal protections for the tenant, almost everything is negotiable, and a personal guarantee can make you responsible for years of rent even if the business closes.
This guide covers how commercial rent works, what to negotiate, and the clauses that cause the most trouble, whether you’re leasing a repair shop, a contractor’s yard, a warehouse, or a storefront. There’s a section at the end for auto repair shops, which have a few extra traps.
Short version: Commercial rent is usually quoted per square foot per year, and in a triple net (NNN) lease you also pay your share of the building’s property taxes, insurance, and upkeep on top of base rent. Before you sign, get written zoning confirmation that your business is allowed at the address, and make the lease depend on getting your permits. Negotiate the things that matter most: the length of the lease and your renewal options, yearly rent increases, who pays for repairs to the roof, HVAC, and other major systems, your right to sell the business and transfer the lease, and a limited personal guarantee instead of an unlimited one. Have a real estate lawyer review the lease before you sign. It costs far less than one bad clause.
How Commercial Rent Is Quoted
Commercial rent is usually stated as a price per square foot per year. A 3,000 square foot space at $16 a foot is $48,000 a year, or $4,000 a month.
For a sense of scale, the national average asking rent for industrial space was about $10 per square foot per year heading into 2026, with most markets between $8 and $13. Retail and office space, and industrial space in expensive metros, often run much higher. Get local numbers from listings and a broker.
The Three Main Lease Types
| Lease type | What you pay | What to watch |
|---|---|---|
| Gross | One rent amount; the landlord pays taxes, insurance, and upkeep | Higher base rent, but your costs are predictable |
| Modified gross | Base rent plus some costs, split however the lease says | Read exactly which costs are yours |
| Triple net (NNN) | Base rent plus your share of property taxes, building insurance, and maintenance | Your total cost can rise every year, and you may owe a year-end catch-up bill |
Triple net is common for industrial and retail space. The extra costs are often called NNN charges or CAM, short for common area maintenance. Budget roughly another $1 to $3 per square foot per year on top of base rent for industrial space, ask the landlord for the last two or three years of actual NNN charges, and ask whether any item is capped.
Before You Sign: Zoning and Permits
Get written confirmation that your business is allowed at the address. Zoning decides what kind of business can operate in a building. A landlord saying “it’s fine” isn’t confirmation, and neither is the fact that a similar business used to be there. Call the town’s zoning or building department, describe exactly what you’ll do, and get the answer in writing.
Make the lease contingent on your permits. A contingency clause lets you cancel without penalty if you can’t get the zoning approval, certificate of occupancy, or licenses you need to operate. Without one, you can end up paying rent on a building you’re not allowed to use.
What to Negotiate
Almost everything in a commercial lease is negotiable, especially if the space has been empty for a while. Here’s what matters most:
Term and renewal options. Landlords often want five years or more. A shorter first term with options to renew, for example three years plus two three-year options, protects you if the business doesn’t work while keeping the space if it does. Renewal options should spell out how the new rent is set. If you’re getting an SBA or bank loan, ask the lender early how long they want your lease to run, because some lenders want the lease term, including renewal options, to cover most of the loan.
Rent increases. Many leases raise rent every year, often by a fixed percentage. Two to four percent a year is common, and over a ten-year lease the difference between 2% and 4% adds up to real money. Know the number before you sign.
Free rent and build-out allowance. You’ll pay rent while you’re still building out and not yet earning. Ask for a few months of free rent, and ask whether the landlord will contribute toward improvements with a tenant improvement (TI) allowance.
Repairs and maintenance. The lease should say clearly who pays for the roof, the structure, the parking lot, and major systems like HVAC, plumbing, and electrical. A tenant who’s responsible for “all repairs” can get stuck replacing a 20-year-old roof or HVAC unit. Ask for the landlord to keep structural and roof repairs, and for a cap on what you pay for replacing major systems.
Use clause. This says what you’re allowed to do in the space. Make it broad enough to cover the business you’ll grow into, not just what you do on day one.
Assignment and subletting. If you ever sell your business, the buyer will need to take over the lease. Ask that the landlord’s consent to an assignment “not be unreasonably withheld,” and avoid clauses that let the landlord take part of the sale price.
Signage, parking, and access. Get your sign rights, parking spaces, and hours of access in writing.
The Personal Guarantee
Most landlords require a small business owner to personally guarantee the lease. That means if your LLC can’t pay, you personally owe the rent, which undoes much of the protection your LLC gives you. An unlimited guarantee on a ten-year lease can mean hundreds of thousands of dollars of personal liability.
You often can’t avoid a guarantee completely, but you can usually limit it:
- A cap, such as six or twelve months of rent, instead of the whole lease.
- A burn-off, where the guarantee ends after a set period of on-time payments.
- A “good guy” clause, common in New York City and some other markets, which limits your liability if you give proper notice, pay rent through the day you leave, and hand back the keys.
- A larger security deposit in exchange for a smaller guarantee.
Piercing the veil covers what else can put your personal assets at risk.
Insurance Requirements
Commercial leases set out the insurance you must carry, the limits, and usually require you to name the landlord as an additional insured, meaning the landlord is covered under your policy for claims that come from your business. Send that section of the lease to your insurance agent before you sign, so the policy you buy actually matches. Liability insurance and bonding covers the basics.
The Process
- Look at listings and drive the area. For specialized space, a former use matching yours saves a lot of money.
- Consider a tenant’s broker. A broker who represents tenants knows local rents and what landlords are giving. They’re usually paid out of the landlord’s commission, but confirm that before you sign anything with them.
- Letter of intent (LOI). Most deals start with a short, usually non-binding letter listing the main terms: rent, term, options, free rent, allowance, and contingencies. Negotiate the big items here.
- Lawyer review. Have a real estate lawyer review the full lease before you sign. Ask for a flat fee quote. It’s the cheapest insurance in the whole process.
- Sign, then insure. Your insurance has to be in place, naming the landlord if the lease requires it, before you get the keys.
If You’re Leasing an Auto Repair Shop
Repair shops have extra issues most tenants never deal with:
- Zoning for auto repair specifically. Many towns only allow repair shops in certain zones, sometimes with a special permit. Get it in writing for this exact use.
- Environmental history. A former garage or gas station can come with contamination you didn’t cause but could get pulled into. Get a Phase I environmental site assessment before you sign, and have the lease say you’re not responsible for contamination that was there before you moved in.
- Floor drains. Find out where they drain. Drains into the ground, like dry wells, can be illegal and expensive.
- Lifts and floor. Confirm the slab can hold lifts, get the landlord’s written approval to install them, and agree in writing whether you can take them with you when you leave.
- Power. Lifts and compressors may need three-phase power. Adding it can cost thousands, so ask whether the landlord will pay for it.
- Bay doors, ceiling height, and outdoor storage for customer cars, plus whether cars can stay outside overnight.
Leasing a building that was already a repair shop solves most of these at once. The rest of the shop plan is in the auto repair shop blueprint, and the environmental rules are covered in auto repair shop licenses, permits, and environmental rules.
Read It Like You’ll Live With It
A commercial lease is a business decision dressed up as paperwork, and the terms you negotiate in the first two weeks will cost or save you money for years. Know your total monthly cost, confirm zoning in writing, limit the personal guarantee, and pay a lawyer to read it before you sign.
Related Guides
- How much it costs to open an auto repair shop, including what to budget for rent and deposits
- Buy a business, start from scratch, or franchise?
- Running a business from home if you’re not ready for a lease yet
- Using a house as your business office or shop if you’d rather buy than lease
- Business address and registered agent
This article is for general informational purposes only and isn’t financial, legal, insurance, or tax advice. For guidance specific to your situation, talk to a licensed professional.
Frequently Asked Questions
In a triple net (NNN) lease, you pay base rent plus your share of the building’s property taxes, insurance, and maintenance. It is common for industrial and retail space, and the extra charges can rise every year, so ask for past NNN costs before you sign.
Commercial rent is usually quoted per square foot per year. A 3,000 square foot space at $16 a foot is $48,000 a year, or $4,000 a month, plus any NNN charges in a triple net lease.
Small business owners usually can’t avoid one completely, but you can often limit it with a cap of several months of rent, a burn-off after a period of on-time payments, a good guy clause in some markets, or a larger security deposit.
Yes. Commercial leases have far fewer tenant protections than apartment leases and almost every term is negotiable. A real estate lawyer’s review usually costs much less than one bad clause, and many will quote a flat fee.
Confirm in writing that zoning allows your business at the address, make the lease contingent on your permits, and know your total monthly cost including NNN charges. Then review the term, renewal options, rent increases, repair responsibilities, assignment rights, and personal guarantee.
Sources
- TenantBase: How much does industrial space cost in 2026, citing Cushman & Wakefield. $10.18 per square foot average asking rent, an $8 to $13 range, and $1 to $3 per square foot for triple net costs.
- The lease terms and negotiating points are standard commercial leasing practice. The “2% to 4%” yearly increase and the lender lease-length point are phrased as common practice, not as rules.