New York change order requirements: 6 ways to get burned

You are three weeks into a brownstone gut in Brooklyn. The homeowner walks the job on a Tuesday, points at the back wall and says "actually, can we move that opening two feet?" You say sure. You do it. Two carpenters, a header, a new lintel, a day of demo you did not plan for. Nobody writes anything down.

Four months later you are $14,000 short on the final draw and the homeowner is telling you, with a straight face, that the opening was always in the plan. Now go prove it. In New York, that argument does not just cost you the money for that one change — it can cost you your leverage on the whole contract, because New York change order requirements are written into state law, and the writing requirement is not a suggestion.

Heads up: this is general information, not legal advice. Requirements change and vary by county and city. Confirm the current rules with your licensing authority or a licensed New York attorney before relying on them.

What a missing change order actually costs on a New York job

Contractors talk about change orders like they are paperwork. They are not. They are the only evidence the extra work was authorized. Skip one and here is what stacks up:

• The direct hit. Labor, materials and equipment for work you performed and will not get paid for. On a mid-size residential remodel a single verbal change can easily run four or five figures.
• The margin you never see. Extra work eats float. The job runs long, your crew is stuck, and the next contract starts late.
• Your lien position. If you end up chasing money, your mechanic's lien is only as strong as your proof that the work was contracted for. Unsigned extras are the first thing an owner's attorney attacks.
• The relationship. The homeowner is not lying. They genuinely remember the conversation differently. That is what an undocumented change does: it turns an honest client into an adversary.

None of that happens if there is a signed piece of paper with a number on it. That is the whole fix.

New York change order requirements, in plain English

For residential work, New York's home improvement contract rules live in General Business Law Article 36-A. The line that matters most to you is in GBL § 771(1):

"Every home improvement contract subject to the provisions of this article, and all amendments thereto, shall be evidenced by a writing and shall be signed by all the parties to the contract."

Read that phrase again: and all amendments thereto. A change order is an amendment. Under the statute, it has to be in writing and signed by everyone who signed the original contract. Not emailed and ignored. Not agreed to on the sidewalk. Written and signed.

A few other things Article 36-A requires in the underlying contract, because they shape how your changes get paid:

• A written description of the work, the materials (make and model where applicable), and the agreed price.
• Approximate start and substantial completion dates, plus any contingencies that would move them.
• If you take progress payments, a payment schedule showing each payment in dollars and cents tied to a specific state of completion — and the amounts have to bear a reasonable relationship to the work performed.
• A mechanic's lien notice in bold face type, notice that payments taken before completion are handled under Lien Law § 71-a(4) unless you post a bond or letter of credit instead, and notice of the owner's three-business-day right to cancel.

Here is the part that catches people: if your change order bumps the price and shifts the payment schedule, you have amended a document state law says must be written and signed. Handling that by text is not "moving fast." It is a hole in your own contract.

General Obligations Law § 15-301 sits in the background too. If your contract says it can only be modified in writing — and most decent contracts do — a court will generally hold you to that. Contractors assume that clause protects them. It cuts both ways: it kills your claim for verbal extras just as easily as the owner's.

New York City has its own change order rules on top of the state law

If you are working in the five boroughs, the state statute is the floor, not the ceiling. Home improvement contractors licensed by the NYC Department of Consumer and Worker Protection (DCWP) also have to follow the city's home improvement contract rules in Title 6 of the Rules of the City of New York.

Under those rules, change orders have to be in writing and signed by both the contractor and the consumer, and the change order has to spell out the cost of the additional work, the new contract price, and when payment is due. DCWP even publishes its own fill-in Change Order Form, which asks you to state whether each item is an addition or a subtraction, whether the total project cost goes up or down, and whether the start or completion date moves.

One line on that form is worth tattooing on your forearm: unless otherwise agreed to in writing by both parties, extra charges for a change order are due before the contractor begins the change in work. The city's own paperwork tells you to get paid for the extra before you build it. Most contractors do the opposite and then wonder why they are financing someone else's kitchen.

Outside the city, New York does not run a single statewide home improvement license — licensing is local. Nassau, Suffolk, Westchester, Rockland and Putnam counties, among others, run their own consumer affairs licensing programs with their own requirements. Check the county you are building in, not the one you are based in.

Your lien clock is shorter than you think

If a change order goes sideways and you end up filing a mechanic's lien, New York Lien Law § 10 gives you less runway on houses than on anything else. For a project on real property improved with a single-family dwelling, the notice of lien generally has to be filed within four months of the completion of your contract or your last furnishing of labor or materials. On other property types it is generally eight months.

Four months disappears fast when you spend the first two politely following up by text. And the clock runs from the last real work — not from the invoice date, and not from a punch-list trip made just to reset it.

6 change order mistakes that get New York contractors burned

1. "I'll write it up later." Later is after the work is done, when the homeowner has zero incentive to sign. This one mistake causes most of the others.
2. Treating an email thread as a signature. The statute says signed by all parties. An unanswered email is not agreement, and "I never saw that email" is the easiest defense in the world.
3. No new contract total. A change order that only shows the extra amount leaves the revised contract price ambiguous. NYC's rules specifically require the new contract price. Put the original amount, the change, and the new total on the document every single time.
4. Ignoring the schedule impact. If the change pushes completion, say so on the change order. Otherwise you have quietly agreed to absorb the delay, and you own the liquidated damages or the angry phone calls that follow.
5. Bundling a week of changes into one vague line. "Misc. extras – $9,400" invites a fight. Itemize. One change, one description, one price, one signature.
6. Doing the work before the money is agreed. You are a builder, not a lender. Price it, get it signed, then build it — which is exactly what DCWP's own form contemplates.

Notice that five of the six are solved by the same thirty-second habit: put it on a form, get a signature, before the work starts.

The fix: two free ways to paper a New York change order

You do not need a lawyer to draft a form for every job. You need a document that captures the same things every time: the job, the date, what changed, what it costs, the new contract total, and two signatures. Pick whichever of these matches how you actually work.

If you live in spreadsheets: the free Excel change order template

If your estimates, your allowances and your job costing already sit in Excel, keep the change order there too. Our free Excel change order template is a professional, auto-calculating change order sheet: line items, labor and materials, markup, tax, and a revised contract value that works itself out as you type. It comes with a change order log so you can see every change on a job in one place, and it lines up with the information New York and NYC rules ask you to state. Print it, sign it, file it. No account, no cost. You can download the free change order spreadsheet and use it on every project you run.

If you live on your phone: the free digital change order tool

If you are on jobsites all day and the laptop is at the office, do it from your phone instead. ChangeOrdersPro is a free change order tool built for exactly the moment described at the top of this article: the homeowner is standing there asking for the extra opening. You type the change, hit send, and they sign it on their own phone before you break out a saw. The revised contract total calculates itself and the signed copy is stored against the job, so four months later you are not reconstructing anything from memory. It is also free — you can create a change order in about 30 seconds and there is no trial to run out. If you are wondering where the catch is, we explain why it is free on the pricing page.

Both do the same job. One suits people who want a file on their own computer; the other suits people who want a signature before they leave the driveway. Use whichever you will actually use on a Tuesday afternoon — the change order you never write is the only one that costs you money.

A 60-second New York change order checklist

Before your crew touches extra work, the document in your hand should show:

1. Job address, homeowner name, and the date of the original contract
2. Your license number, if you are licensed by NYC DCWP or a licensing county
3. A specific description of the change — addition or subtraction
4. The cost of that change, itemized
5. The original contract price, and the new contract price
6. When that amount is due
7. Any change to the start or completion date
8. Signatures and dates from both you and the homeowner

That is it. Eight lines between you and an argument you cannot win. If you work across a state line too, we keep a running breakdown of change order requirements by state, plus more guides on the ChangeOrdersPro blog.

The homeowner who moved the opening two feet was not trying to rob you. They just remembered a conversation the way people remember conversations. A signed change order is not about distrust — it is what lets you say yes to changes without betting your margin on somebody's memory.

Frequently asked questions

Do change orders have to be in writing in New York?

For residential home improvement work, New York General Business Law § 771(1) requires that every home improvement contract subject to Article 36-A, and all amendments to it, be evidenced by a writing and signed by all parties to the contract. A change order is an amendment, so the safe answer is yes — put it in writing and get it signed. In New York City, DCWP's home improvement rules separately require change orders to be in writing and signed by both the contractor and the consumer.

What has to be on a New York City change order?

Under the NYC home improvement contract rules, a change order must be in writing, signed by the contractor and the consumer, and must state the cost of the additional work, the new contract price, and when payment is due. DCWP publishes a fill-in Change Order Form that also captures whether each item is an addition or subtraction and whether the start or completion date moves. Unless both parties agree otherwise in writing, extra charges for a change order are due before the contractor begins the change in work.

Can I use a free Excel template for New York change orders?

Yes. Nothing in the rules requires special software — it requires a signed writing containing the right information. A spreadsheet works fine as long as it captures the change, the cost, the new contract price, the payment timing and both signatures. Our free Excel change order template is built around exactly those fields and calculates the revised contract value for you, so you can print it, sign it and keep it with the job file.

How long do I have to file a mechanic's lien in New York?

Under New York Lien Law § 10, a notice of lien on property improved with a single-family dwelling generally must be filed within four months of completion of the contract or the last furnishing of labor or materials; for other property types the period is generally eight months. Deadlines are strict and fact-specific, so confirm your dates with a New York construction attorney rather than counting on a rule of thumb.

Is this legal advice?

No. This is general information, not legal advice. Requirements change and vary by city and county — New York has no single statewide home improvement license, and places like New York City, Nassau, Suffolk, Westchester, Rockland and Putnam run their own programs. Confirm the current rules with your state or local licensing board or a licensed attorney before relying on them.

Daisy Porter

Co-Founder, ChangeOrdersPro

Daisy writes about the unglamorous side of running a build — the paperwork, the change orders, and the conversations that keep a job profitable. ChangeOrdersPro is the free tool her team built so contractors can send a professional change order and get it signed from a phone in about 30 seconds.