Arizona change order requirements: what a verbal costs

You are three weeks into a remodel in Mesa. The homeowner walks the job on a Tuesday, points at the hall, and says “while you’re in there, move that wall two feet and add a second vanity.” You say sure. Your framer eats two days, your plumber reworks the rough-in, and the tile order goes up by 40 square feet. Nobody signs anything, because everybody is standing in the dust being reasonable.

Then the final invoice lands with $6,800 of extra work on it, and the reasonable homeowner turns into a person who says, word for word, “I never agreed to that price.”

That is the moment Arizona change order requirements stop being paperwork trivia and start being the difference between getting paid and eating the cost. Arizona has specific written-contract rules with real teeth behind them, and a licensing board that can pull your license over paperwork failures. Here is what the rules actually say, what a verbal really costs in this state, and the two free ways to stop bleeding money on it.

Not legal advice. This is general information for contractors, not legal advice. Requirements change and vary by project type — confirm the current rules with the Arizona Registrar of Contractors (ROC) or a licensed Arizona attorney before relying on them.

What Arizona change order requirements actually say

Separate what is written into Arizona law from what is just good practice, because contractors get these tangled and then argue the wrong point in front of an investigator.

1. Your base contract has hard statutory minimums

Arizona Revised Statutes § 32-1158 requires that any contract over $1,000 between a contractor and a property owner be in writing and contain, at minimum: your name, business address and license number; the owner’s name, mailing address and the jobsite address or legal description; the date the contract was entered into; a description of the work; the estimated completion date; the total dollar amount including applicable taxes; any advance deposit; the amount and trigger point of any progress payments; and notice that the owner may file a written complaint with the Registrar of Contractors, including the Registrar’s phone number and website. That complaint notice has to be prominently displayed in at least ten-point bold type, and the contract has to be signed by both the property owner and you or your designated representative.

Here is why that matters for change orders: your contract price, your scope, and your payment schedule are all statutory contract terms. The moment you change the work without a signed document, the contract on file and the work actually being performed no longer match. Every dispute after that is your word against theirs.

2. Storm and insurance restoration work has an explicit written change order rule

If you do residential repair or replacement of damage from a catastrophic storm in an area designated by an insurer — think hail and monsoon roof work — A.R.S. § 32-1158.02 applies on top of the general contract rules. Subsection F is blunt: any changes, additions or deletions to the work specified in the original contract must be included in a written change order signed by the homeowner. Not agreed to on the phone. Written and signed.

That same statute caps the down payment at 50% of the contract, gives the homeowner a four-business-day cancellation right plus a 72-hour right to cancel after an insurer denies the claim, and requires specific estimate disclosures. Subsection H says the quiet part out loud: failure to comply with that section is grounds for license suspension or revocation under § 32-1154.

3. For everything else, your own contract is the rule

Arizona does not have one blanket statute saying every change order on every residential job must be signed before work starts. Do not let anyone tell you otherwise, and do not tell a client that either. What actually happens is that nearly every serious construction contract — AIA, ConsensusDocs, or the one your attorney wrote — contains a clause requiring written, signed authorization for extra work. When you skip it you are usually not breaking a statute; you are breaching your own contract and handing the other side the argument. Read your own change order clause before you decide a verbal is fine.

What a verbal change order really costs in Arizona

Contractors underestimate this because they only count the unpaid invoice. The invoice is the cheapest part.

• The unpaid work itself. Labor, materials, and the markup you never got to charge. On a $6,800 extra at a 12% net margin, you did not lose $816 of profit — you lost $6,800 of cash you had already spent.
• A schedule hit nobody paid for. Undocumented extras almost always add days. Without a signed change order adjusting the completion date, you are still on the hook for the original estimated completion date sitting in your § 32-1158 contract.
• Your lien clock keeps running. Arizona lien rights are unforgiving and they do not wait for your dispute to resolve. A preliminary twenty day notice under A.R.S. § 33-992.01 must generally be served within 20 days of first furnishing labor or materials. A lien generally must be recorded within 120 days of completion — and only 60 days if the owner records a notice of completion. Under § 33-998 the lien lapses unless you bring a foreclosure action within six months of recording. Arguing about a verbal for eight weeks can quietly burn your best collection tool.
• A ROC complaint you have to defend. An unhappy homeowner here has a long runway. For new construction, complaints must generally be filed within two years from close of escrow or actual occupancy, whichever came first. For remodel or repair work, generally two years from the date work was last performed. Two years is plenty of time for a memory of a hallway conversation to improve dramatically in the homeowner’s favor.
• Your license. On storm and insurance restoration work, missing the signed change order requirement is not just a billing problem — it is expressly grounds for suspension or revocation. That is your whole business, over a piece of paper you could have sent from the truck.
• The referral you will never hear about. Nobody tells you they didn’t refer you. A fight over a surprise $6,800 in Scottsdale kills three future jobs you will never know existed.

6 Arizona change order mistakes that cost contractors real money

1. Taking the verbal and starting the same day. The most expensive habit in residential construction. Once the crew is cutting, you have zero leverage — the homeowner has your labor and you have nothing signed. Get the yes in writing before the saw comes out.
2. Writing “additional bathroom work — $6,800” and calling it a change order. A one-line description is a fight waiting to happen. It tells an investigator, a judge and the homeowner nothing about what was included. Break it out: framing, plumbing rough-in, tile, fixtures, labor hours, materials, markup, tax.
3. Never adjusting the completion date. Extras eat days. If your change order does not say “this adds 4 working days to the completion date,” you gave away schedule for free and left yourself exposed on the date in your written contract.
4. Not restating the revised contract total. Every change order should show the original contract amount, this change, and the new revised total. Homeowners rarely dispute a number they watched climb one signed step at a time. They almost always dispute a number that appears for the first time on the final bill.
5. Getting the wrong person to approve it. The spouse who happens to be home on a Wednesday is not always the signer on the contract. On insurance restoration work the statute is specific that the homeowner signs. Get the actual contracting party — our guide on who signs a change order covers the edge cases.
6. Treating a text message as a signature. A “yeah go ahead” text beats nothing, and it has saved contractors before. But it is not a signed change order, it usually carries no price, and it will not satisfy a contract clause or the storm-work statute. See what goes wrong in our breakdown of verbal change orders.

The Arizona change order checklist that holds up

Whatever tool you use, a change order that survives a dispute in Arizona carries all of this on one page:

• Change order number and date, tied to the original contract
• Your legal business name and ROC license number
• Homeowner name and the jobsite address
• A specific description of the added, deleted or changed work — what, where, and what it replaces
• Itemized cost: labor, materials, subs, markup, and applicable transaction privilege tax
• The schedule impact in days, stated plainly
• Original contract amount, this change, and the revised contract total
• Payment terms for this change (due on signing, next draw, or with final)
• Signature and date lines for both the homeowner and you

Print that list and tape it inside the truck. Every item on it exists because a contractor somewhere lost money without it.

Two free ways to fix this before your next job

There is no reason to be rewriting a Word doc for every extra in 2026, and no reason to pay for software to fix it either. There are two free options — pick whichever matches how you actually work.

If you want a spreadsheet you control

Some builders want the file on their own machine, in a format they can edit, print, and hand to a bookkeeper. That is what the free Excel change order template is for. It has every field from the checklist above already laid out, and it does the arithmetic for you — line items, markup, tax and the revised contract total all calculate automatically, so you are not adding columns on a phone calculator in a driveway. It also includes a change order log, so you can see every change on a job in one view instead of digging through email. Fill it in, print it, get it signed on site, keep the copy. No account, no cost, no catch.

If you want it signed from a phone before the crew moves

A spreadsheet only helps if you are near a printer, and the homeowner is often not on site when the decision gets made. That is the case for doing it digitally with the free change order tool. You fill in the change on your phone, hit send, and the homeowner gets an email with the itemized change and a signature line they can complete from wherever they are — usually in a couple of minutes. You get a timestamped record of exactly what was approved and when, and the revised contract total updates itself. That timestamp is what ends the argument two years later when a ROC complaint shows up.

Both do the same job: they turn a hallway conversation into a signed document before the work starts. Use whichever one you will actually use on a Tuesday afternoon in 108-degree heat.

Why both of these are free

Fair question. Undocumented extras are the most common way small contractors lose money, and charging $49 a month to fix it means the people who need it most never touch it. Both the spreadsheet and the digital tool are completely free — the pricing page explains why. If you want more on the same theme, there is a stack of guides on the blog, including a state-by-state look at change order requirements by state and a walkthrough of what happens when a change order goes unsigned.

The Mesa job at the top of this post is a pattern, not a scare story. It happens in Phoenix, Tucson and Flagstaff every week, and it is always the same shape: a reasonable conversation, no paperwork, and an invoice that arrives to a person who has decided they do not remember agreeing. Ten minutes of paperwork on the day beats ten weeks of collections after.

Frequently asked questions

Do Arizona change order requirements say a change order must be in writing?

It depends on the work. For residential repair or replacement of catastrophic storm damage in an insurer-designated area, A.R.S. § 32-1158.02(F) expressly requires changes, additions or deletions to be included in a written change order signed by the homeowner. For general residential work Arizona does not have one blanket statute requiring every change order to be signed, but A.R.S. § 32-1158 requires the underlying contract over $1,000 to be written and signed with specific terms, and virtually every standard construction contract requires written authorization for extra work. In practice, written and signed is the only safe way to do it.

What happens if I do extra work in Arizona without a signed change order?

You are relying on the homeowner's goodwill to get paid. If they dispute it you have no signed record of scope, price or schedule impact, and you may also be in breach of your own contract's change order clause. On storm and insurance restoration work, failure to comply with § 32-1158.02 is grounds for license suspension or revocation under § 32-1154. Meanwhile your Arizona lien deadlines keep running while you argue.

Is there a free Arizona change order template I can use?

Yes. You can download a free Excel change order template that includes every field an Arizona change order should carry — ROC license number, itemized costs, markup, tax, schedule impact and the revised contract total — and calculates the totals for you. There is also a free digital version if you would rather send it and have the homeowner sign from their phone. Both are free.

How long does an Arizona homeowner have to file a complaint against me?

For new construction, complaints with the Registrar of Contractors must generally be filed within two years from close of escrow or actual occupancy, whichever came first. For remodel or repair work it is generally two years from the date work was last performed. That is a long window, which is exactly why timestamped, signed change orders matter.

Is this legal advice?

No. This is general information, not legal advice. Requirements change and vary — confirm the current rules with your state's licensing board, in this case the Arizona Registrar of Contractors, 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.