Constructive change in the United States

The inspector rejects conforming work. An RFI answer adds scope. The drawings cannot be built as drawn. Nobody issues a change order, and the owner says the work was always yours. In the United States that fact pattern has a name, a test and a clause: constructive change.

A note on sources. FAR 52.243-4 (JUN 2007) was read from acquisition.gov and cross-checked against 48 C.F.R. § 52.243-4; the copies match. The clause as incorporated in your contract governs, not the FAR site. A201–2017 wording is quoted from AIA's own complete 38-page sample of the form; the 15-page sample on AIA's main site stops at Article 3 and cannot support any Article 4, 7 or 15 wording.

The short answer

The test: two elements, and whose words they are

The Federal Circuit put it this way in Bell/Heery v United States, citing The Redland Co. v United States:

"To demonstrate a constructive change, a plaintiff must show (1) that it performed work beyond the contract requirements, and (2) that the additional work was ordered, expressly or impliedly, by the government."

The labels Change Element and Order Element that fill the commentary are not Bell/Heery's. They come from the Board's restatement in Appeals of Thalle Construction Company. The substance is the same, but if you quote the Federal Circuit, use its words.

An older formulation keeps something the modern one drops. Miller Elevator Co. v United States calls the second component the "order or fault" component. (Inference.) "Fault" is why defective specifications fit the test at all. Nobody orders a contractor to fight an unbuildable design; the government's responsibility for the design stands in for the order.

The Order Element is the one that usually fails. Bell/Heery was a contractor loss on it: the complaint did not allege that the Contracting Officer ordered any specific work. In Thalle the Board applied it against the contractor — the supplier change had been forced by the supplier going out of business, not by the government.

Two conditions sit beside the test. Neither is an element; either defeats the claim.

• Authority. In Winter, the contract reserved change authority to the Contracting Officer. The project manager could not bind the government, and implied actual authority could not exist against that express reservation. An order counts only if it traces to the Contracting Officer, directly or by ratification.
• Notice. Below.

The clause is the doctrine

On federal construction the doctrine works through the Changes clause, not on its own.

FAR 52.243-4(b) (JUN 2007):

"Any other written or oral order (which, as used in this paragraph (b), includes direction, instruction, interpretation, or determination) from the Contracting Officer that causes a change shall be treated as a change order under this clause; provided, that the Contractor gives the Contracting Officer written notice stating (1) the date, circumstances, and source of the order and (2) that the Contractor regards the order as a change order."

FAR 52.243-4(c): "Except as provided in this clause, no order, statement, or conduct of the Contracting Officer shall be treated as a change under this clause or entitle the Contractor to an equitable adjustment."

Why that matters:

1. Notice is part of the entitlement. It is a proviso to the deeming, not a separate step.
2. The order must come from the Contracting Officer. (b) says so and (c) excludes everything else. That is why Winter is decisive, and why Bell/Heery rested on the (b) wording.
3. The measure comes from the clause. (d) adjusts for the effect on "any part of the work under this contract, whether or not changed by any such order" — the textual basis for recovering impact on unchanged work.
4. Defective specifications are handled in the text. Below.

Edition status. Under the Revolutionary FAR Overhaul, Part 43 and clauses 52.243-1 to 52.243-7 were retained, with Part 43 deviation text adopted agency by agency. On 18 September 2026 the FAR Council proposed rules including one for Parts 14, 28 and 36 and related Part 52 clauses (FAR Case 2026-010; comments to 19 October 2026). [PARTIAL] Two independent reads of its preamble found no mention of 52.243-4 (the amendatory text was not read in full), and no proposed rule covers Part 43. The same proposal would remove several 52.236 clauses and may renumber construction clauses into a new subpart 52.4, which reaches 52.236-2 (Differing Site Conditions). Treat 52.243-4 (JUN 2007) as unchanged, and read the clause as incorporated in your contract. FAR 52.243-7 (JAN 2017) leaves its notice periods as negotiated blanks, not fixed 20- and 30-day periods.

The recurring categories, and what decides each

Miller Elevator sorts constructive changes into five types: contract-interpretation disputes, government interference or failure to cooperate, defective specifications, misrepresentation and nondisclosure of superior knowledge, and acceleration. Site-level patterns fit inside it:

Superior knowledge. Thalle quotes four elements from CAE USA: the contractor performed without vital knowledge of a fact affecting cost or duration; the government knew that and the contractor had no reason to obtain it; any specification misled the contractor or failed to put it on notice to inquire; and the government failed to provide the information. The root case is Helene Curtis Industries, Inc. v United States. Thalle shows where these claims die: the loss was caused by the supplier going out of business, not by anything withheld. The four elements are not enough without causation.

Interference. CONFLICT Precision Pine & Timber, Inc. v United States is read as requiring conduct specifically targeting the contract; Metcalf Construction Co. v United States says Precision Pine was misread and takes a broader view. Treat claims resting on the implied duty as contested.

Spearin, precisely

United States v Spearin is the most quoted and most overstated case in US construction law. Here is what it says.

It begins by restating the general rule, which runs against the contractor: "Where one agrees to do, for a fixed sum, a thing possible to be performed, he will not be excused or become entitled to additional compensation because unforeseen difficulties are encountered." It then carves out the exception: "But if the contractor is bound to build according to plans and specifications prepared by the owner, the contractor will not be responsible for the consequences of defects in the plans and specifications." And it protects that exception from standard boilerplate: "This responsibility of the owner is not overcome by the usual clauses requiring builders to visit the site, to check the plans, and to inform themselves of the requirements of the work."

The warranty itself, as stated on the facts of that case: "The insertion of the articles prescribing the character, dimensions and location of the sewer imported a warranty that if the specifications were complied with, the sewer would be adequate."

The precise proposition: where the owner prescribes how the work is to be built and the contractor is bound to follow it, the owner impliedly warrants that following it will produce an adequate result. Four overstatements follow from missing that:

• "The owner warrants everything it provides." No. The warranty attaches to specifications the contractor is bound to build to. It can cover a site condition only where that condition makes the prescribed design fail, as in Spearin itself. Site information as such is a matter for FAR 52.236-2 (Differing Site Conditions), superior knowledge, or misrepresentation.
• "Any design problem is the owner's." Only where the requirement is prescriptive. A performance requirement leaves the means, and their risk, with the contractor. Modern specifications are hybrids, so the analysis runs provision by provision.
• "Spearin displaces the fixed-price risk rule." It is an exception to that rule, and says so.
• "Site-visit clauses defeat it." The "usual clauses" do not. Spearin says nothing about a clause that expressly moves design responsibility. Read the clause you have.

On federal work the warranty is priced through the clause. 52.243-4(d) exempts "an adjustment based on defective specifications" from the 20-day cut-off, and for defective specifications "for which the Government is responsible" includes "any increased cost reasonably incurred by the Contractor in attempting to comply." Late notice does not shorten a Spearin claim under that sentence.

Comparison, labelled as one. Thorn v Mayor and Commonalty of London (1876) 1 App Cas 120 (HL) implied no warranty by the employer that its design was buildable — the opposite default, and why the neutral variations pages find no English counterpart to this category.

Constructive change is not constructive acceleration

Same adjective, different claim. The conflation is common and costs money.

They meet at the notice. Fraser's fourth element requires that the contractor "notified the government that it regarded the alleged order to accelerate as a constructive change in the contract," and Miller Elevator lists acceleration as its fifth category. Same clause, not the same test. Proving the two Bell/Heery elements does not prove acceleration. The acceleration claim dies at element (1), excusable delay without expert critical-path proof (Amatea/Grimberg JV v Secretary of the Navy), or at element (2), because the time was never requested. The exception is reasonable acceleration recovered as mitigation of owner delay, which does not require all five Fraser elements. The full treatment is at acceleration and constructive acceleration in the United States.

Notice: what 52.243-4 actually requires, and how strictly

Read the clause in layers, because the numbers belong to different paragraphs.

• (b) sets no period. It requires written notice with two contents: the date, circumstances and source of the order, and that the contractor regards the order as a change order. Both are required.
• (d) is where the 20 days are. "Except for an adjustment based on defective specifications, no adjustment for any change under paragraph (b) of this clause shall be made for any costs incurred more than 20 days before the Contractor gives written notice as required." In form this limits damages; it does not bar entitlement. It applies only to (b) changes, not to written change orders under (a), and not to defective specifications.
• (e) requires the contractor to assert its right to an adjustment within 30 days of the (b) notice, by a written statement of "the general nature and amount of the proposal," unless the government extends the period. The statement may be included in the (b) notice.
• (f) allows no proposal after final payment.

This matches the US notice and time bars page: a cost cut-off, not an entitlement bar.

How strictly? Leniently in principle; fatally for the silent contractor. Notice provisions are not to be applied "too technically and illiberally where the Government is quite aware of the operative facts": Hoel-Steffen Construction Co. v United States. The leniency is tied, in the court's own words, to the government's knowledge. Its limit is K-Con Building Systems, Inc. v United States. K-Con never objected during performance and first identified the changes in a letter about two years later. Notice, the court said, "differentiates requests the contractor views as outside the contract from those it deems contemplated by the contract." Nothing excused the delay, and the claims failed.

(Inference.) The limb of (b) that fails is usually the second. The government nearly always knows the facts, because its own inspector gave the direction. What it does not know is that the contractor regards the direction as a change. And where every cost predates the notice by more than 20 days, the (d) cut-off is in effect a complete bar.

In practice (judgement): give the (b) notice in writing to the Contracting Officer when the direction is given. Name the date, the circumstances and the source. Say in terms that you regard the order as a change order, and put the (e) statement in the same letter.

It travels beyond federal contracts, but unevenly

Where the contract copies the federal clause, the reasoning follows the wording. In Roger J. Au & Son, Inc. v Northeast Ohio Regional Sewer District, a public owner's contract reproduced the federal changes wording, including the (b) sentence treating an order "from the Owner which causes any such change" as a change order. Be precise about the holding. The court decided differing site conditions and notice. It reversed summary judgment because there was evidence of actual or timely constructive notice, relying on federal board authority that formal notice is not needed where responsible officials knew the facts. It shows federal reasoning following federal wording into a state contract. It does not apply the constructive-change test, though it is sometimes cited as though it does.

Where the contract does not copy it, a state may reject the label and reach the result anyway. In Sentinel Industrial Contracting Corp. v Kimmins Industrial Service Corp., the Supreme Court of Mississippi said Mississippi law does not recognize "constructive change orders," but upheld the subcontractor's recovery on estoppel: extra work had been required while written change orders were refused. The case is often cited as a writing requirement defeating constructive change. On the reported reasons it is the reverse.

On public state work the doctrine carries more weight. Several states deny waiver by conduct against public owners, for reasons of agency and appropriations, not formality — see written instruction and waiver in the United States. (Inference.) Where the public contract has a (b)-type deeming clause, it may be the only route left, because the claim is made under the contract and asks nobody to waive a term.

[NEGATIVE FINDING — scope limited] No state-by-state survey of adoption by name was located for this page. The common line that the doctrine is "alive and well" in most state and private disputes is practitioner commentary this pass did not verify, and it is not asserted here.

The AIA analogue, and its trap

A Construction Change Directive (A201–2017 §7.3.1) is signed by the Owner and Architect without the Contractor. The Contractor proceeds promptly (§7.3.6), and if price is not agreed the Architect determines it (§7.3.4). A CCD is not a constructive change. It is a written, directed change the form expects, with only the price open. A constructive change is what happens when no instrument issues.

A201–2017 has no sentence treating an informal direction as a Change Order. Where the Owner or Architect directs work and declines to issue a Change Order or CCD, the route is an Article 15 Claim, and under §15.1.5 (Claims for Additional Cost) "notice as provided in Section 15.1.3 shall be given before proceeding to execute the portion of the Work that is the subject of the Claim." That pre-performance notice is the private counterpart of the (b) notice, and a stricter one.

The trap is the waiver sentence added to §7.4 in 2017. The Architect may order minor changes not adjusting the Contract Sum or Time; that power existed in 2007. What 2017 added: "If the Contractor believes that the proposed minor change in the Work will affect the Contract Sum or Contract Time, the Contractor shall notify the Architect and shall not proceed to implement the change in the Work. If the Contractor performs the Work set forth in the Architect's order for a minor change without prior notice to the Architect that such change will affect the Contract Sum or Contract Time, the Contractor waives any adjustment to the Contract Sum or extension of the Contract Time." AGC's 2017 commentary called it "an unfair trap."

Why it matters here. A "minor change" that is not minor is what a constructive change looks like on private work. The two regimes deal with it in opposite directions:

(Inference.) A contractor trained on federal work, where the rule is to proceed and give notice, loses money under §7.4 by doing exactly that.

Where these claims die

1. No order traceable to authority — Winter, Bell/Heery, Thalle.
2. Notice of the facts without the characterisation — (b)'s second limb, K-Con.
3. A performance specification argued as a design one — Spearin is narrower than it looks.
4. Superior knowledge without causation — Thalle.
5. Acceleration pleaded as a two-element constructive change — see above, unless it is recovered as reasonable mitigation of owner delay.
6. Performing an AIA "minor change" before objecting — §7.4.
7. A signed modification with a release — see change order releases in the United States.

About this material Library content is general information about construction claim practice, not legal advice. Entitlement, deadlines and procedure are governed by your own contract and by the law of the place the work is performed. Reviewed September 22, 2026 · Report a correction