6.4 Change Orders (AIA G701) & Contract Adjustments
Key Takeaways
Under AIA Document A201-2017 Section 7.2, a Change Order (AIA Document G701-2017) is a tripartite written agreement signed by the Owner, Contractor, and Architect modifying the Contract Sum, Contract Time, or both.
AIA Document G709-2018 (Proposal Request) is an administrative inquiry used by the architect to obtain contractor pricing and schedule impact data for a contemplated change; it does not authorize work or alter the contract.
Change Order price adjustments require rigorous itemization of direct costs—burdened labor, materials, equipment rental, subcontracts, and insurance premiums—subject to contractually specified overhead and profit (O&P) caps.
Whether a change order settles cumulative or delay impacts depends on its actual release language, contract provisions and reservations; signing a standard G701 alone does not automatically waive every related claim.
The architect signs the Change Order not as a contracting party to the construction agreement, but as the owner's professional administrator certifying that the change aligns with design intent and that cost and schedule adjustments are reasonable.
6.4 Change Orders (AIA G701) & Contract Adjustments
The Change Order represents the highest legal standard of formal bilateral agreement for modifying a construction contract during the construction phase. Governed by AIA Document A201-2017 Section 7.2 and executed on AIA Document G701-2017, a Change Order alters the original contract documents, permanently adjusting the Contract Sum, the Contract Time, or both.
For ARE 5.0 candidates, mastering the Change Order process requires far more than knowing which document to sign. You must understand the proposal inquiry workflow, the mathematical anatomy of itemized labor and material audits, the legal significance of the tripartite signature requirement, and the unforgiving doctrine of accord and satisfaction.
The Legal Anatomy of AIA Document G701-2017
AIA Document A201-2017 Section 7.2.1 defines a Change Order with contractual rigor:
'A Change Order is a written instrument prepared by the Architect and signed by the Owner, Contractor, and Architect stating their agreement upon all of the following: (1) The change in the Work; (2) The amount of the adjustment, if any, in the Contract Sum; and (3) The extent of the adjustment, if any, in the Contract Time.'
The Tripartite Signature Requirement
AIA Document G701 is fundamentally a tripartite agreement. It requires the signatures of all three principal stakeholders:
- The Owner: Holds contractual privity with the contractor; authorizes expenditure of capital and extension of project milestones.
- The General Contractor: Holds contractual privity with the owner; agrees to execute the revised scope for the agreed sum and within the agreed duration.
- The Architect: Administers the contract on the owner's behalf; certifies that the changed work is consistent with design intent, that pricing is reasonable based on professional evaluation, and that schedule adjustments reflect sound critical-path logic.
If any one of these three parties refuses to sign, the document cannot be executed as a Change Order. If the contractor refuses to sign because the price is too low, the owner and architect must either negotiate further or issue an AIA Document G714 Construction Change Directive (CCD). If the architect refuses to sign because the change violates building codes or life-safety requirements, the owner and contractor cannot compel the architect's professional certification.
Amendment to the Prime Contract
Executing an AIA Document G701 legally amends AIA Document A101-2017 (Standard Form of Agreement Between Owner and Contractor). It recalculates the baseline project metrics:
- Original Contract Sum
- Net change by previously authorized Change Orders
- Contract Sum prior to this Change Order
- Contract Sum increase / decrease by this Change Order
- New Contract Sum including this Change Order
- Contract Time adjustment (in calendar days)
- Date of Substantial Completion as of the date of this Change Order
The Proposal Request Workflow: AIA Document G709
Before a Change Order can be drafted, the scope change must be priced and scheduled. The architect initiates this formal inquiry using AIA Document G709-2018 (Proposal Request), historically known as an Architect's Bulletin or Request for Proposal (RFP).
Function and Structure of AIA Document G709
AIA Document G709 is an administrative request issued by the architect to the contractor. It contains a detailed narrative description of the contemplated change, accompanied by revised architectural drawings, engineering sketches, or supplementary specifications. The document requests the contractor to submit an itemized quotation of cost adjustments and schedule modifications within a specified timeframe (typically 14 calendar days).
The Critical Work Authorization Boundary
A fundamental rule tested on the ARE is that AIA Document G709 does NOT authorize construction:
'THIS IS NOT A CHANGE ORDER, A CONSTRUCTION CHANGE DIRECTIVE, OR A DIRECTION TO PROCEED WITH THE WORK. Work shall not commence until authorized by an executed Change Order or Construction Change Directive.'
If an architect issues a G709 asking how much it would cost to add an exterior canopy, and the contractor prematurely purchases the canopy framing and begins digging footings before a G701 or G714 is executed, the contractor acts at its own financial peril. If the owner decides not to proceed with the canopy, the owner has zero contractual liability to compensate the contractor for unauthorized expenditures.
Contractor Change Order Request (COR)
In response to a G709 (or initiated by the contractor due to an unforeseen condition), the contractor submits a Change Order Request (COR), also called a Contractor Change Proposal (CCP). The COR must include an itemized breakdown of all trade labor, materials, equipment, subcontractor quotes, and schedule impact analyses.
Itemized Cost Breakdown and Audit Rigor
When evaluating a contractor's Change Order proposal, the architect must perform a rigorous administrative and mathematical audit under the professional standard of care. Standard project specifications (Division 01 General Requirements, Section 01 26 00) define allowable cost categories and impose strict caps on contractor markups.
1. Burdened Labor Rates
Contractors cannot bill arbitrary hourly rates for trade labor. The allowable labor cost consists of the base hourly wage plus the verified labor burden:
- Base Hourly Wage: The actual wages paid to the craft worker under applicable collective bargaining union agreements or prevailing wage determinations.
- Mandatory Labor Burdens: Federal Insurance Contributions Act (FICA / Social Security and Medicare), Federal Unemployment Tax Act (FUTA), State Unemployment Tax Act (SUTA), Workers' Compensation insurance, and mandatory union welfare/pension fringe benefits.
- Exclusion of Embedded Profit: Contractors frequently attempt to pad labor rates by embedding overhead and profit directly into the hourly craft rate. The architect must verify certified payroll records to ensure the labor rate reflects actual employer expenditure before overhead and profit markup is added.
2. Materials and Consumables
Material costs must reflect the actual net purchase price paid to suppliers, including freight, delivery, and appropriate trade discounts. Off-site storage, restocking fees, and material handling must be substantiated by supplier invoices.
3. Equipment Rental and Usage
Rental machinery (cranes, excavators, scaffolding) must be priced according to third-party rental invoices. For contractor-owned equipment, specifications routinely mandate reimbursement based on industry publication standards, such as the AED Green Book (Associated Equipment Distributors) or Rental Rate Blue Book, rather than inflated commercial rental rates.
4. Tiered Overhead & Profit (O&P) Markups
Specifications strictly regulate the percentage markups that general contractors and trade subcontractors can apply to changed work. The standard industry model follows a tiered structure to prevent pyramiding markups:
- Work Performed by Direct Trade Subcontractor: 10% Overhead + 5% Profit (or a flat 10% to 15% combined O&P markup).
- General Contractor Markup on Subcontractor Work: Capped at 5% (or 10%) for coordination and administrative processing.
- Credit Changes (Deductive Change Orders): When work is omitted from the contract, the owner receives a credit for the actual net cost of the work, but the contractor generally retains their original overhead and profit on the omitted scope under standard AIA provisions.
5. Schedule Impact and Time Extensions
A contractor requesting an extension of Contract Time must furnish an updated Critical Path Method (CPM) schedule analysis. A time extension cannot be granted simply because a change adds labor hours. If the change occurs on an activity with 20 days of schedule float, the change does not impact the critical path, and zero time extension is warranted.
Change-order settlement and reserved claims
A G701 records agreement on changed work, sum and time. The standard form does not itself contain a universal release of every direct, cumulative or delay claim. The actual change-order language, incorporated contract clauses, express reservations and applicable law determine settlement scope.
If the owner needs final resolution of a change’s impacts, obtain clear agreed language identifying covered costs, time and any reservation. A contractor should disclose a known unsettled impact rather than assume silence preserves it. The architect evaluates the agreed scope and documents status; it should not declare an all-claims waiver merely because the form is G701.
Mutual Waiver of Consequential Damages (A201 § 15.1.7)
Under AIA Document A201-2017 Section 15.1.7, the owner and contractor mutually waive claims for consequential damages arising out of or relating to the contract. For the owner, this includes rental expenses, loss of use, loss of income, lost financing, and loss of business reputation. For the contractor, this includes principal office overhead (including executive compensation under the Eichleay formula), losses of bonding capacity, and lost profit on other unperformed projects. Change Orders compensate direct, verified project costs—never speculative consequential losses.
Cost Breakdown Audit Checklist for AIA G701 Change Orders
The following checklist outlines the essential audit points an architect must verify before recommending an AIA Document G701 Change Order for owner execution:
| Item | Description of Required Verification | Standard Specification Benchmark |
|---|---|---|
| Direct Labor Burden | Review certified payroll; verify FICA, FUTA, SUTA, Workers' Comp, and union fringes. | Confirm burden is based on actual payroll taxes; no hidden overhead markup in craft wage. |
| Material Invoices | Require supplier quotes or wholesale invoices with all trade discounts deducted. | Verify materials match specified standards; confirm freight/delivery is itemized. |
| Equipment Rates | Compare rental equipment against third-party invoices or AED Green Book rates. | Disallow hand tools; ensure equipment is billed only for active operational hours. |
| Tiered O&P Markups | Apply contractual markup percentages (e.g., 10% sub O&P, 5% GC fee on sub). | Prevent markup pyramiding across multiple sub-tiers; enforce spec percentage caps. |
| Bonds and Insurance | Verify incremental bond premium increase (typically 0.75% to 1.5% of net add). | Verify contractor's surety agent letter certifying actual bond adjustment cost. |
| Schedule CPM Logic | Review time-impact analysis demonstrating the change delayed critical-path activities. | Reject schedule extensions if the affected work possessed available schedule float. |
An architect issues AIA Document G709-2018 (Proposal Request) describing a potential change to add acoustic wall paneling in an executive boardroom. The document includes architectural drawings and states that the contractor should submit an itemized cost and schedule proposal within 14 days. Upon receiving the G709, the general contractor immediately issues a purchase order for $32,000 of custom acoustic paneling to lock in fabric dye-lot pricing. Ten days later, before receiving the contractor's quotation, the owner decides the boardroom upgrade is too expensive and directs the architect to cancel the proposed change. The contractor demands that the owner reimburse the $32,000 purchase order plus a $4,800 cancellation restocking fee. How is this financial dispute resolved under AIA contract provisions?
The owner is not obligated to reimburse the contractor because an AIA Document G709 is an inquiry only and explicitly prohibits the contractor from commencing work or incurring costs prior to Change Order execution.
The owner must pay the full $36,800 because the architect's issuance of a G709 creates an implied contract to purchase materials under standard commercial code provisions.
The architect is personally liable for the $36,800 because issuing a G709 without written owner approval violates the professional standard of care under AIA B101.
The contractor and owner must split the loss equally under the mutual indemnification covenants of AIA Document A201 Section 3.18.
A general contractor submits a Change Order Request (COR) for $69,900 for unexpected subsurface rock excavation. The proposal contains the following line items: (1) Direct machine operator wages: $18,000; (2) Labor burden (payroll taxes, workers' comp, union benefits): $7,200; (3) Hydraulic rock breaker rental invoice: $22,000; (4) Trade subcontractor overhead and profit (15%): $7,080; (5) General contractor fee on subcontractor work (10%): $5,428; (6) Home office corporate executive travel and legal review: $9,500; (7) Additional performance bond premium (1%): $692. Section 01 26 00 of the project manual limits subcontractor O&P to 10%, general contractor markup on subcontractor work to 5%, and excludes corporate home office expenses from change order pricing. What should the architect's audit determine?
The entire proposal must be rejected because subsurface rock excavation is an assumed site risk included in standard stipulated-sum bidding.
All line items are fully allowable because contractual general condition caps only apply to Construction Change Directives, not negotiated Change Orders.
The architect must reject line item 6 (corporate home office expenses) and reduce the subcontractor and general contractor markups in line items 4 and 5 to the contractually specified caps of 10% and 5%.
The proposal is valid except for line item 7, because performance bond premiums are fixed at the initial contract award and can never be adjusted.
Three months before Substantial Completion, the owner and general contractor execute an AIA Document G701 Change Order for $45,000 and a 6-day extension of Contract Time to add an automated smoke evacuation system in the building atrium. Following final completion of the project, the contractor submits a $125,000 Claim to the Initial Decision Maker (IDM), alleging that the atrium smoke evacuation work caused severe 'trade stacking,' cumulative efficiency losses, and delayed the downstream installation of acoustic plaster ceiling finishes. The contractor presents detailed productivity loss studies and labor density records to substantiate the claim. How should the IDM rule under standard construction contract principles? Assume the executed change order expressly provides full final settlement of all direct, indirect, cumulative and delay impacts of this change, and no rights were reserved.
Grant the $125,000 claim because cumulative impact and loss of productivity damages cannot be calculated until after the entire project reaches final completion.
Award $62,500 as an equitable split because the owner derived the ultimate life-safety benefit from the automated smoke evacuation system.
Refer the dispute to the local building official to determine whether smoke evacuation installation complies with the International Fire Code.
Deny the claim entirely because execution of the AIA Document G701 Change Order constituted a full accord and satisfaction, mutually waiving all direct, indirect, cumulative, and delay claims arising from the changed work.
Source and application
A201-2017 official sample. Checked October 16, 2026. Apply the cited form edition and the actual project amendments, adopted codes and supplied scenario assumptions. Numerical examples are teaching inputs unless expressly attributed to a requirement.
Sections you finish are checked off in the contents.