The AIA subcontractor change order form is the industry-standard document that formalizes scope, cost, and schedule modifications between a GC and subcontractor. Getting it wrong costs money. Getting it right protects your margins.

Over 60% of construction payment disputes trace back to poorly documented change orders. This checklist walks you through every required element of the AIA change order form so nothing falls through the cracks.

What the AIA Subcontractor Change Order Form Covers

The AIA G701 Change Order form and its companion documents create a paper trail that connects scope changes to billing. The form captures the parties involved, the contract being modified, the dollar amount of the change, and the time impact.

For subcontractor-level changes, GCs typically use AIA G701 paired with a detailed backup package. The backup matters as much as the form itself.

Required Fields on the AIA Change Order Form

Every AIA change order form requires specific information to be enforceable. Missing fields create openings for disputes.

Field	Purpose	Common Mistake
Project Name & Number	Identifies the specific contract	Using informal project nicknames
Change Order Number	Sequential tracking	Skipping numbers or duplicating
Date of Issuance	Establishes timeline	Backdating to cover late notice
Original Contract Sum	Baseline for calculations	Using previously modified sum
Net Change by This Order	Dollar impact	Excluding markup or bond costs
New Contract Sum	Updated total	Math errors in running totals
Time Extension (Days)	Schedule impact	Leaving blank instead of writing zero
Signatures	Bilateral agreement	Missing one party's signature

Step-by-Step Checklist for Processing AIA Change Orders

Follow this sequence every time you process a subcontractor change order.

Before the form:

Confirm the subcontractor provided timely written notice per the subcontract terms
Verify the proposed work is actually outside the original scope
Request itemized cost breakdown with labor, material, equipment, and markup
Check that markup percentages match the subcontract allowances
Obtain lien waivers for any previously billed change order work

On the form:

Enter the correct original contract sum (including all prior change orders)
List the change order number in sequence with no gaps
Describe the scope change in specific terms, not general language
Include both cost and time impacts
Reference the attached backup documentation by exhibit number

After the form:

Update the G703 schedule of values with a new line item
Adjust the project schedule if time was granted
Notify the owner and update the prime contract change order log
File the executed form with all backup in the project document system

How Markup Should Appear on the Form

The AIA form itself shows the net change amount. The detailed backup behind the form breaks out the markup components.

Standard subcontractor markup on change orders runs 10-15% overhead and profit on their own work. The GC then adds 5-10% on the subcontractor pass-through.

Make sure the subcontractor's markup does not exceed what the subcontract allows. Many subcontracts cap change order markup at specific percentages. If the sub bills 20% and the contract allows 15%, you need to catch that before signing.

Common Documentation Gaps That Create Disputes

The form is only as strong as the backup behind it. These gaps show up repeatedly in construction disputes.

No daily logs supporting the labor hours claimed. The subcontractor says the work took 40 hours. The GC has no way to verify without contemporaneous field documentation.

Material invoices missing from the backup. The sub includes material costs in the change order but provides no purchase orders or delivery receipts. This makes the claim impossible to audit.

No photos of changed conditions. Differing site conditions or concealed work requires visual documentation taken before and during the changed work.

Vague scope descriptions. "Additional electrical work per field direction" tells the auditor nothing. The description should state exactly what was added, where, and why.

Frequently Asked Questions

What is the difference between AIA G701 and G701-CMa?

AIA G701 is used on standard design-bid-build projects where the GC contracts directly with the owner. G701-CMa is used when a construction manager acts as adviser. The forms contain similar fields but route through different approval chains. Use the version that matches your project delivery method.

Can a GC modify the standard AIA change order form?

Yes, but modifications should be agreed upon at the start of the project. Adding custom fields for cost codes, backup requirements, or approval thresholds is common. Deleting required fields weakens the document's enforceability and creates risk.

How should a GC handle a subcontractor who refuses to sign a change order?

Document the refusal in writing and proceed based on the subcontract's dispute resolution provisions. Most subcontracts allow the GC to direct the work under a construction change directive while the cost is negotiated. Do not allow unsigned changes to stall project progress.

What backup documentation should accompany every AIA change order?

At minimum: itemized cost breakdown, labor rates and hours, material invoices or quotes, equipment rental rates, subcontractor quotes (if further subcontracted), schedule impact analysis, and photographs of the changed conditions. The more detail, the fewer disputes.

How does retainage apply to change order work on the AIA form?

Retainage on change order work follows the same percentage as the original contract unless the parties negotiate a different rate. The retainage amount should be tracked separately on the G703 continuation sheet so it can be released per the original retainage schedule.

When should a GC reject a subcontractor's change order proposal?

Reject when the scope was included in the original subcontract, when the markup exceeds contractual limits, when the cost breakdown lacks supporting documentation, or when the time extension request is unsupported by schedule analysis. Document the rejection in writing with specific reasons.

Tighten Your Change Order Process

Sloppy change order documentation bleeds margin on every project. SubcontractorAudit flags missing backup, verifies markup compliance, and connects every approved change directly to your pay application workflow.

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