How to read a New York commercial lease, clause by clause

Before you start: how the document is built

A New York commercial lease is usually a landlord's standard form with a long rider attached. The printed form covers the basics. The rider is where the negotiated deal lives, and it often overrides the form. When the two conflict, the rider typically controls, so read the rider with the most care.

Most leases also have exhibits: a floor plan, a work letter describing construction, building rules, and sometimes a guaranty. They are part of the contract, so read them as closely as the lease itself.

Keep a notepad open and write down three things as you go: every dollar amount, every date or deadline, and every place that says "Landlord's consent." Most disputes start in one of those three places.

The business terms

Premises and square footage

The lease will say which floor or suite you are leasing and how many square feet it has. In New York that number is usually rentable square feet, which includes a share of lobbies, corridors and mechanical space. The space you actually use (usable square feet) is smaller. The difference is called the loss factor, and it varies a lot from building to building.

Ask the landlord for the usable figure and compare spaces on cost per usable foot, not just the asking rent. Also check whether the lease lets the landlord remeasure the space later and raise the rent.

Term, commencement and rent start

Look for three separate dates:

Commencement date: when the lease term begins, often tied to the landlord finishing its work.
Rent commencement date: when you start paying, which may come later if you negotiated free rent.
Expiration date: usually the last day of the month at the end of the term.

If commencement depends on "substantial completion" of the landlord's work, see how that is defined and what happens if the landlord is late.

Base rent and free rent

Base rent is normally stated as an annual amount paid in monthly installments, with fixed increases each year or every few years. Free rent periods are common on longer deals. Check whether free rent covers only base rent, or also escalations and electricity. Also check whether the landlord can take the free rent back if you default.

Escalations and additional rent

This is the section tenants skip and later regret. In New York, "additional rent" covers everything beyond base rent, and it can add up.

Charge	How it usually works	What to check
Real estate tax escalation	You pay your share of tax increases above a base year	Which year is the base, and your percentage share
Operating expense escalation	Your share of increases in building costs over a base year	What is excluded (capital work, landlord's financing costs)
Porter's wage escalation	Rent rises by a formula tied to building workers' wages	The multiplier and the base wage rate
Electricity	Submetered, direct metered, or charged at a flat rate per foot	Any markup over what the landlord pays
Commercial Rent Tax	A city tax on some Manhattan tenants, paid by the tenant	Whether your address and rent level make you subject to it

A few things to look for:

Base year. A base year that has not yet been reassessed or fully occupied can make your future escalations bigger than they should be.
Your share. Your percentage is your rentable area divided by the building's. Make sure the building total is stated and cannot be quietly shrunk.
Audit rights. You want the right to review the landlord's escalation statements within a reasonable window.

Confirm your Commercial Rent Tax exposure with an accountant. Whether you owe it depends on location and rent level, and it is your obligation, not the landlord's.

Security deposit and guaranty

Deposits in New York are often several months of rent and are sometimes posted as a letter of credit instead of cash. Check whether the deposit goes down over time if you pay on time, and when the landlord has to return it after you move out.

For smaller companies, landlords often ask for a "good guy" guaranty. A principal personally guarantees rent only until the tenant vacates and hands back the keys, with proper notice. Read the exact conditions for walking away. Missing a notice deadline or leaving the space in the wrong condition can keep the guarantor liable. Have an attorney review any personal guaranty before you sign.

Using and changing the space

Use clause

The use clause says what you can do in the space. Too narrow a clause can block a future pivot and make it harder to sublet. Make sure your use is allowed under the building's certificate of occupancy and zoning, and check whether the landlord promises that it is.

Alterations

Almost every change to the space needs landlord approval, and structural or building system work usually needs approved contractors and plans. Look for:

Whether minor cosmetic work (paint, carpet, furniture) can be done without consent
Supervisory fees charged on your construction
Which improvements you must remove at the end of the lease

Work letter

If the landlord is building out the space or giving you a construction allowance, the work letter spells it out. Check what counts as an eligible cost, when the allowance is paid, and whether unused money can go toward rent or other expenses.

Assignment and subletting

Your needs will change, and this clause decides how flexible you are. Typical provisions include:

Consent standard. "Not to be unreasonably withheld" is much better for you than "sole discretion."
Recapture. The landlord may be able to take back the space instead of approving your sublet.
Profit sharing. The landlord often takes a share of any sublet profit, after your costs.
Permitted transfers. Look for the right to assign to an affiliate or a buyer of your business without consent.

Repairs, services and building operations

The lease should say who fixes what. Landlords typically handle structure, roof and base building systems. Tenants typically handle the interior of the space. Check the hours for heating and cooling. After-hours HVAC in New York buildings is often billed hourly and can be expensive if your team works late.

Insurance, indemnity and casualty

You will need to carry specific insurance and name the landlord (and often its managing agent and lender) as additional insureds. Get the lease requirements to your insurance broker early.

The casualty clause covers fire or other damage. Look for rent abatement while the space is unusable, and a right to terminate if restoration takes too long.

Default, remedies and legal protections

Read the default section closely. Check the cure periods for monetary and non-monetary defaults, and whether you get written notice first.

New York tenants sometimes rely on a court order called a Yellowstone injunction to pause a cure period while they dispute a default. Some leases try to waive that right. Also look for a jury trial waiver and a clause shifting legal fees. Any of these can change your leverage in a dispute, so ask an attorney to walk you through them.

If your landlord has a mortgage, you may be asked to sign an SNDA (subordination, non-disturbance and attornment agreement). The non-disturbance part protects your lease if the lender forecloses, so ask for it.

The end of the lease

Renewal option. Check the notice window (often many months before expiration) and how renewal rent is set, such as fair market value with an arbitration process.
Surrender condition. Know exactly what state the space must be in when you leave.
Holdover. Staying past expiration usually triggers rent at a steep multiple of the last rent, and possibly liability for the landlord's damages.

Put every notice deadline in a calendar the day you sign.

A quick review checklist

Rentable vs usable square feet confirmed
All three dates identified
Base years and your share stated in writing
Commercial Rent Tax exposure checked with an accountant
Guaranty release conditions understood
Assignment and sublet terms workable for your growth plans
Renewal and surrender deadlines calendared

This guide is general information, not legal or tax advice. Have a New York real estate attorney review your lease before you sign, and confirm tax questions with an accountant.

Next steps

If you are looking for space, post a requirement so owners and brokers can respond with options that fit your terms. If you have space to fill, list it with clear rentable and usable figures up front.

On Leasemark right now there are 24 active listings and 14 active requirements across NYC. Browse available spaces on search, see what tenants are looking for on requirements, or explore the market by neighborhood at NYC.