### In the 

# United States Court of Appeals
For the Seventh Circuit

____________________ No. 19-2716

D ESIGN B ASICS , LLC, and
C ARMICHAEL & D AME D ESIGNS , I NC ., Plaintiffs-Appellants

,

v.

S IGNATURE C ONSTRUCTION , I NC ., et al., Defendants-Appellees

.

____________________
Appeal from the United States District Court
for the Central District of Illinois.
No. 1:16-CV-1275 — Colin S. Bruce

, Judge

.

____________________

A RGUED J ANUARY 22, 2020

— D ECIDED A PRIL 23, 2021

____________________

Before S YKES , Chief Judge

, and W OOD and H AMILTON , Circuit Judges

. S YKES , Chief Judge . Copyright law strikes a practical balance between the intellectual -property rights of authors and the public interest in preserving the free flow of ideas and information and encouraging creative expression, all in furtherance of the constitutional purpose to “promote the Progress of Science and useful Arts.” U.S. C ONST . art. 1, § 8, cl. 8; see generally Google LLC v. Oracle Am., Inc. , 141 S. Ct.2 No. 19-2716

1183, 1195 (2021). Copyright trolls—opportunistic holders of registered copyrights whose business models center on litigation rather than creative expression—disrupt thisbalance by inhibiting future creativity with negligible societal benefit. “Like the proverbial troll under the bridge, these firms try to extract rents from market participants who must choose between the cost of settlement and the costs and risks of litigation.” Design Basics, LLC v. Lexington Homes, Inc.

, 858 F.3d 1093, 1097 (7th Cir. 2017).
Plaintiff Design Basics, LLC, is a copyright troll. Id. at 1096–97. The firm holds registered copyrights in thousands of floor plans for suburban, single-family tract homes, and its employees trawl the Internet in search of targets for strategic infringement suits of questionable merit. The goal is to secure “prompt settlements with defendants who would prefer to pay modest or nuisance settlements rather than be tied up in expensive litigation.” Id. at 1097. As we explained in Lexington Homes , “[t]his business strategy is far removed from the goals of the Constitution’s intellectual property clause.” Id. Instead, it amounts to an “intellectual property shakedown.” Id. at 1096.
This appeal involves yet another Design Basics infringement action, one of more than 100 such suits in the last decade or so. Id. at 1097. When Design Basics was last before this court in Lexington Homes , we were guided by two wellestablished copyright doctrines— scènes à faire and merger— that constrain the ability of in fringement plaintiffs to claim expansive intellectual-property rights in a manner that impedes future creativity. Applyi ng these doctrines, we held that Design Basics’ copyright in its floor plans is thin. Id. at 1101–05. The designs consist mainly of unprotectable stock elements—a few bedrooms, a kitchen, a great room, etc.—No. 19-2716 3

and much of their content is dictated by functional considerations and existing design conventions for affordable, suburban, single-family homes. When copyright in an architectural work is thin, only a “strikingly similar” work will give rise to a possible infringement claim. Id. at 1105. Applying this standard, we held that no reasonable jurycould find for Design Basics and affirmed a summary judgment against it. Id.
This latest appeal meets the same fate. Design Basics sued Signature Construction, Inc., and related companies, accusing them of copying ten of its registered floor plans for suburban, single-family homes. The district court entered summary judgment for the defendants based largely on the reasoning of Lexington Homes

. Design Basics asks us to overrule Lexington Homes . We decline to do so. And we take this opportunity to restate and clarify the elements of a prima facie case of infringement, both as a general matter and more particularly in cases involving works of this type in which copyright protection isthin. For this category of claims, only extremely close copying is actionable as unlawful infringement. Put more precisely, this type of claim may mo ve forward only if the plaintiff’s copyrighted design and the allegedly infringing design are virtually identical. That standard is not satisfied here, so we affirm.
I. Background
We described Design Basics’ business strategy in Lexington Homes ; a brief summary will suffice for present purposes. Design Basics holds registered copyrights in thousands of floor plans for suburban, single-family homes. Lexington Homes , 858 F.3d at 1096. The plans are not technical4 No. 19-2716

construction drawings. Rather, they are basic schematic designs, largely conceptual in nature, and depict layouts for one- and two-story single-family homes that include the typical rooms: a kitchen, a dining area, a great room, a few bedrooms, bathrooms, a laundry area, a garage, stairs, assorted closets, etc.
More than a decade ago, Patrick Carmichael and MylesSherman bought Design Basics “as an investment opportunity.” 1 Id. at 1096. Since then, litigation proceeds have become “a principal revenue stream” for the firm. Id. at 1097. Indeed,Design Basics incentivizes its employees to search the Internet for litigation targets by paying a finder’s fee—a percentage of net recovery—if they locate a prospectiveinfringement defendant. This is the core of the firm’s business model. Id.
The firm maintains an easily accessible website displaying 2,847 floor plans. It also regularly sends mass mailings of its designs to members of the National Association of HomeBuilders. Over the years the firm has sent millions of publications containing its floor plans to home builders. When it initiates litigation, it hopes—indeed, expects—to find these designs in the defendant’s files.
This case has its genesis in that business model. In 2014 Paul Foresman, Director of Business Development at Design Basics, emailed Carmichael with the subject line: “A gift for you.” Foresman told Carmichael that by using the Internet Archive’s Wayback Machine, he discovered that a firm called “Signature Homes” may have copied some of Design Basics’ home designs. Carmichael was initially confused

1 Carmichael & Dame Designs, Inc., is named as an additional plaintiff. It has no independent role in this litigation, so we mention it no further.No. 19-2716 5

because Design Basics was already asserting infringement claims against a firm by that name, but Foresman clarified that this Signature Homes—based in Illinois—was a different company. Pleased with Foresman’s discovery, Carmichael wrote back: “Wow very nice gift my friend.”
This infringement suit followed. In 2016 Design Basics sued Signature Construction and related companies, 2 alleging that they infringed ten of its floor plans. During discovery, Design Basics learned that Signature’s files contained photocopies of four of its plans: “Ainsley,” “2461 Shawnee,”“2963 Columbus,” and “9169 Kempton Court.” The photocopies were found in Signature’s files for homes labeled “Carlisle,” “Lot 119 Lake Falls,” “Lot 63 Sommer Place,” and “Lot 309 Stonegate,” respectively. The photocopy of Design Basics’ 2461 Shawnee floor plan had red markings on it,indicating modifications to the plan. John Tanner, a draftsman at Signature, testified that he received the marked-up image from Steve Meid, a Sig nature partner, and understood that the markings were modifications that Meid wanted him to make.
At the end of lengthy discovery, Signature moved for summary judgment, relying heavily on our ruling against Design Basics in Lexington Homes . As we explained in that opinion, under the scènes à faire and merger doctrines, Design Basics’ copyright protection in its floor plans is thin, id. at 1101–05, and therefore only a “strikingly similar” plan would give rise to an infringement claim, id. at 1105. Using

2 The other corporate defendants are Signature Homebuilders, LLC; Signature Development of Peoria, Inc.; Signature Homes of Bloomington, LLC; Ironwood Homes, Inc.; and Ironwood Homes of Peoria, LLC. Randy Peifer, an investor in some of the Signature companies, is also a defendant. We refer to the defendants collectively as “Signature.”6 No. 19-2716

this standard, we held that no reasonable jury could find infringement. Id. Along the way to this conclusion, we noted that Design Basics had not submitted expert testimony to support its claim, relying instead on a conclusory declaration from one of its draftsmen. Id. at 1104.
Design Basics tried to avoid that same criticism here bysubmitting an affidavit from a third-party expert in opposition to Signature’s summary-j udgment motion. The witness, Matthew McNicholas, is an architect and has served as an outside expert for Design Basics in at least 13 lawsuits.McNicholas asserted that Signature “unquestionably infringed” Design Basics’ home plans.
To support that opinion, McNicholas produced a 103-page report. The first 30 pages cover his qualifications and explain his general views on architectural copyright law. Pages 32–85 are descriptions of the ten copyrighted floor plans at issue in this case. This section of his report contains narrative descriptions of the features of each Design Basics floor plan, but the descriptions are remarkably similarto one another. Indeed, some parts are almost word-forword identical.
A few examples will illustrate. For the Design Basics floor plan called “The Linden,” McNicholas wrote: “The idea behind the plan of The Linden focuses on creating a home for entertaining guests, an d whose spaces are flexible enough to meet the needs of a broad range of potential homeowner[s].” One of the features he analyzed is the front
door:
From the perspective of a guest, the sheltered front door is a welcome area, not just with the covered stoop, but also composed with walls toNo. 19-2716 7

either side of the entry, which shelter against wind and driving rain. This consideration for waiting guests reinforces the entertainment value of this design decision.
His description of the floor plan called “The Manning” is similarly generic: “The concept driving the plan of theManning centers around creating a home focused on entertainment, but with enough flexib ility to evolve into multiple solutions as the homeowner needs, while maximizing privacy.” Again, McNicholas described the front door:
From the perspective of a guest, the sheltered front door is a welcome area, not just with the covered stoop, but also arranged with the long wall of the Living Room as a shelter against driving wind and rain, while waiting for the door to open. This consideration for waiting guests reinforces the entertainment value of this design decision.
His analysis of “The Paterson” is likewise almost identical: “The idea behind the plan of The Paterson focuses on creating a home for entertaining guests, and whose spaces are flexible enough to meet the needs of a broad range of potential homeowner[s].” Regarding the front door, McNicholas wrote:
From the perspective of a guest, the sheltered front door is not just a welcome area, but with walls to either side of the entry—which shelteragainst wind and driving rain—it is a considerate space. Further, the sidelight at the door allows for transparency between the interior and exterior, and this thoughtfulness for wait-8 No. 19-2716

ing guests reinforces the entertainment value of this design decision.
In short, the McNicholas report purports to separatelyanalyze the distinguishing features of each of the copyrighted plans at issue here, but the descriptions are so ordinary and interchangeable as to be virtually meaningless.
The McNicholas report ends with a visual section containing side-by-side comparisons of the Signature floor plans and the Design Basics plans they are alleged to infringe. As the district judge described this section of the report, the expert “employed extensive color-filling” to depict parallel rooms in the copyrighted and accused plans in matching colors in an effort “to make the plans seem more similar.”The judge rejected this technique as an attempt “to manipulate and enhance the appearance of similarity.” To control for this problem, the judge extracted the line drawings fromthe plans without the color-filling enhancements and confined his analysis accordingly.
Comparing the unenhanced drawings, the judge determined as a matter of law that no unlawful copying occurred. He noted multiple categories of dissimilarity between the copyrighted and accused plans:
Room dimensions are different. Some planshave more rooms than the plans they are alleged to infringe. Ceilings are of differentheights, and/or are of different styles (i.e., cathedral versus flat versus tray). Exterior dimensions are different. Bathrooms are in different locations. Sinks, tubs, toilets, andshowers are in different locations within bathrooms. Garages are of different sizes and/or areNo. 19-2716 9

in a different orientation to the rest of the house.
Based on these observations and applying Lexington Homes

, the judge had no difficulty concluding that Signature’s plans“are dissimilar enough to avoid infringing the thin copyright” in the Design Basics plans. The judge entered final judgment for Signature, and Design Basics appealed.

II. Discussion
A. Proving Copyright Infringement
“Copyright and patents, the Constitution says, are to‘promote the Progress of Science and useful Arts, by securing for limited Times to Authors and Inventors the exclusive Right to their respective Writings and Discoveries.’” Google, 141 S. Ct. at 1195 (quoting U.S. C ONST . art. I, § 8, cl. 8). To that end, the Copyright Act, 17 U.S.C. §§ 101 et seq. , establishes the prerequisites for copyright and sets limits on its
scope. Google , 141 S. Ct. at 1195–96 (explaining that Congress weighs “the advantages and di sadvantages” of copyright protection and establishes “its boundaries and conditions, the existence of exceptions and exemptions, all by exercising its own constitutional power to write a copyright statute”).
The basic prerequisites are these: “Copyright protection subsists ... in original works of authorship fixed in any tangible medium of expression ... .” 17 U.S.C. § 102(a). “Originality is a constitutional requirement” arising by implication from the Constitution’s reference to “authors” and “writings.” Feist Publ’ns, Inc. v. Rural Tel. Serv. Co.

, 499 U.S. 340, 346 (1991). The threshold for originality is low: “Original, as the term is used in copyright, means only that the work was independently created by the author (as opposed to copied from other works), and that it possesses10 No. 19-2716

at least some minimal degree of creativity.” Id. at 345 (citing
1 M ELVILLE B. N IMMER AND D AVID N IMMER , N IMMER ON C OPYRIGHT § 2.01[A], [B] (1990)).
The Act lists categories of works that qualify for copyright protection, including “literary works,” “musical works,” “dramatic works,” and “pictorial, graphic, and sculptural works,” among others. § 102(a)(1), (2), (3), (5). “Architectural plans” and “technical drawings” are included in the statutory definition of “pictorial, graphic, and sculptural works” and can be copyrighted in this category. § 101. Until 1990, however, architectural works were not included in § 102(a) as a stand-alone category of protected works. That left some uncertainty about the status of constructed designs—i.e., the buildings themselves—among other complexities in this corner of copyright law. 1 N IMMER ON C OPYRIGHT § 2A.09[A] (Rev. ed. 2020); 2 W ILLIAM F. P ATRY , P ATRY ON C OPYRIGHT § 3:101–3:107, Westlaw (database updated March 2021).
In 1990 Congress amended the Act to create a separatecategory of “architectural works” in the § 102(a) list, implementing our nation’s obligatio ns under the Berne Convention for the Protection of Literary and Artistic Works. See Architectural Works Copyright Protection Act, Pub. L. No. 101-650, §§ 701–706, 104 Stat. 5133 (1990) (codified at17 U.S.C. § 102(a)(8)). The 1990 legislation added the following definition for the new statutory term “architectural work”:
An “architectural work” is the design of a building as embodied in any tangible mediumof expression, including a building, architectural plans, or drawings. The work includes the overall form as well as the arrangementNo. 19-2716 11

and composition of spaces and elements in thedesign, but does not include individual standard features.

Id. § 702 (codified at 17 U.S.C. § 101).
Importantly, the Act limits the scope of copyright protection even for “works that th e definitional provisions might otherwise include.” Google , 141 S. Ct. at 1196. One prominent limitation captures the traditional copyright principle known as the “idea/expression dichotomy”—the line that separates copyrightable expression from noncopyrightable ideas and facts. Golan v. Holder , 565 U.S. 302, 328 (2012).Section 102(b) codifies this principle: “In no case does copyright protection for an original work of authorship extend to any idea, procedure, process, system, method of operation, concept, principle, or discovery, regardless of the form in which it is described, explained, illustrated, or embodied in such work.”
The Act creates a cause of action for infringement and provides as a general matter that “[a]nyone who violates any of the exclusive [statutory] rights of the copyright owner ... is an infringer.” 17 U.S.C. § 501(a); see also id. § 501(b) (providing a cause of action). This generalization doesn’t shed much light on what it takes to prove a claim, but the courts have developed and explained the plaintiff’s burden of proof. The doctrine begins wi th this statement from the Supreme Court: “To establish infringement, two elements must be proven: (1) ownership of a valid copyright, and (2) copying of constituent elem ents of the work that are original.” Feist , 499 U.S. at 361. This concise formulation obscures a good deal of complexity beneath the surface, but it provides a basic framework for the claim.12 No. 19-2716

The first element—ownership of a valid copyright—is not contested here. Design Basics registered its floor plans with the United States Copyright Office, and Signature does not dispute its ownership or the validity of the copyrights. We therefore assume, as we did in Lexington Homes , “that Design Basics owns the plans and that the plans are entitledto some copyright protection, i.e., they were created independently and possess a modicum of creativity” to satisfy the minimal originality requirement. 858 F.3d at 1099.
This litigation turns on the second element, as many infringement cases do. At this step of the general framework, the plaintiff must prove that the defendant “cop[ied] ... constituent elements of the [copyrighted] work that are original.” Feist , 499 U.S. at 361. This element actually encompasses two distinct questions, although our caselaw hasn’t always neatly separated them. The first question is whether, as a factual matter, the defendant copied the plaintiff’s protected work (as opposed to independently creating a similar work); the second question is whether thecopying “went so far as to constitute an improper appropriation.” Atari, Inc. v. N. Am. Philips Consumer Elecs. Corp.

, 672 F.2d 607, 614 (7th Cir. 1982); see also 4 N IMMER ON C OPYRIGHT § 13.01[B] (Rev. ed. 2020) (explaining the two components of the second element in the Feist framework).
The Ninth Circuit refers to these distinct subsidiary elements as “copying” and “unlawful appropriation.” Rentmeester v. Nike, Inc. , 883 F.3d 1111, 1117 (9th Cir. 2018). The Second Circuit uses the terms “copying” and “wrongful copying.” Zalewski v. Cicero Builder Dev., Inc., 754 F.3d 95, 100 (2d Cir. 2014). Whatever the nomenclature, the point is to capture the important differences between the two.No. 19-2716 13

In all infringement cases, the plaintiff must prove, as a factual matter, that the defendant actually copied his work. Lexington Homes, 858 F.3d at 1099. “Proof of copying by the defendant is necessary because independent creation is a complete defense to copyright infringement.” Rentmeester, 883 F.3d at 1117. For “[n]o matter how similar the plaintiff’s and the defendant’s works are, if the defendant created his independently, without knowled ge of or exposure to theplaintiff’s work, the defendant is not liable for infringement.” Id.
Importantly, proof of actual copying is necessary but not sufficient to establish liability for infringement. “Not all copying ... is copyright infringement,” Feist , 499 U.S. at 361, so the plaintiff must also prove that the defendant’s copying was wrongful—i.e., that the defend ant took enou gh of his protected expression (as opposed to unprotectable ideas, concepts, facts, etc.) to constitute unlawful appropriation of his expressive work. Rentmeester , 883 F.3d at 1117; Zalewski

, 754 F.3d at 100–01.
The first of these subsidiary elements—let’s call it “actual copying” or “copying in fact”—can be proved either directly or indirectly. Direct evidence is rare, so many cases turn on inferences to be drawn from circumstantial evidence. A circumstantial case of actual copying requires: (1) evidence that the defendant had access to the plaintiff’s copyrighted work (enough to support a reasonable inference that the defendant had an opportunity to copy); and (2) evidence of a substantial similarity between the plaintiff’s work and the defendant’s work (enough to support a reasonable inference that copying in fact occurred). Lexington Homes , 858 F.3d at 1099; see also Rentmeester , 883 F.3d at 1117; Zalewski , 754 F.3d
at 100–01.14 No. 19-2716

We have acknowledged the possibility that an accusedwork may bear such “an uncanny resemblance” to a copyrighted work that copying is “the only plausible explanation” for the similarity. Lexington Homes , 858 F.3d at 1100. In such a case, “further proof of access may not be required.” Id. But the exception is “rare” and reserved for “unusual
cases.” Id. Ordinarily, “to prove a circumstantial case of copyright infringement, the p laintiff must separately prove both access and similarity.” Id.

Confusion sometimes arises because the test for unlawful appropriation—a distinct inquiry— also looks for substantial similarity between the defendant’s work and the plaintiff’swork. As the Second Circuit has explained, “a close similarity between two works is often relevant to proving both actual copying and wrongful copying.” Zalewski , 754 F.3d at 101 (emphasis added). Accordingly, the cases often use “the same term—‘substantial similarity’—to describe both the degree of similarity relevant to proof of copying and thedegree of similarity necessary to establish unlawful appropriation.” Rentmeester , 883 F.3d at 1117. But “[t]he term means different things in those two contexts.” Id.
The difference hinges on the distinction between the protected and unprotected elements in the plaintiff’s work. Id. ; see also Zalewski , 754 F.3d at 101. When used as a test for actual copying in a circumstantial case, the requirement of“substantial similarity” is not limited to the protected elements of the plaintiff’s work. Si milarities that relate to either the protected or unprotected elements of the plaintiff’s work may be probative of actual copying; the inquiry simply looks for the kind and degree of similarity that “one would notexpect to arise if the two works had been created independently.” Rentmeester, 883 F.3d at 1117. Put somewhatNo. 19-2716 15

differently, in a circumstantial case, the plaintiff has theburden to show that the two works are so similar that copying is a better explanation for the similarities than pure coincidence.
But “similarity that relates to unprotected elements is probative only of [actual] copying—not wrongful copying.” Zalewski , 754 F.3d at 101 (emphasis added). Wrongful copying—unlawful appropriation—requires substantial similarities between the defendant’s work and protected elements in the plaintiff’s copyrighted work. Rentmeester, 883 F.3d at 1117. “When an original work contains many un protected elements, ... a close similarity between it and a copy may prove only copying, not wrongful copying.” Zalewski

, 754 F.3d at 101.
To preserve the distinction between these two concepts, we will follow the Second Circuit’s lead and use the term “probative similarity” to refer to the degree of similarity necessary to support an inference of actual copying and the term “substantial similarity” to refer to the test for wrongful copying or unlawful appropriation. Id.
Our circuit, like most others, uses the “ordinary observer” test for unlawful appropriation: “whether the accused work is so similar to the plaintiff’s work that an ordinary reasonable person would conclude that the defendantunlawfully appropriated the plaintiff’s protect[a]ble expression by taking material of substance and value.” Wildlife Express Corp. v. Carol Wright Sales, Inc. , 18 F.3d 502, 508–09 (7th Cir. 1994) (quoting Atari , 672 F.2d at 614). 3

3 See also Yankee Candle Co. v. Bridgewater Candle Co. , 259 F.3d 25, 33–34 (1st Cir. 2001); Leigh v. Warner Bros., Inc. , 212 F.3d 1210, 1214 (11th Cir. 2000); Hartman v. Hallmark Cards, Inc. , 833 F.2d 117, 120 (8th Cir. 1987);16 No. 19-2716

B. Scènes à Faire and Merger

In Lexington Homes we explained at length that under the scènes à faire and merger doctrines, Design Basics holds only thin copyright protection in its floor plans. Just a brief recap is needed here.
Standard elements in a genre—called scènes à faire 4 in copyright law—get no copyright protection. Scènes à faire are “so rudimentary, commonplace, standard, or unavoidable that they do not serve to distinguish one work within a class of works from another.” Bucklew v. Hawkins, Ash, Baptie &
Co. , 329 F.3d 923, 929 (7th Cir. 2003). If standard elements received copyright protection, then the creation of a single work in a genre would prevent others from contributing tothat genre because the copyright owner would have exclusive rights in all of the genre’s basic elements.
We explained in Lexington Homes that Design Basics’ floor plans largely consist of scènes à faire . 858 F.3d at 1102– 03. Every plan has a kitchen, a great room or living room, adining room, bedrooms, bathrooms, and so forth. The arrangements of the rooms are also largely scènes à faire . The kitchen is always close to the dining room; the bedrooms will usually be clumped together and near a bathroom; the door from the garage into the house usually leads to the kitchen rather than the great room or living room.
What accounts for these familiar arrangements? Convention in this genre, certainly, which brings this particular type

Universal Athletic Sales Co. v. Salkeld , 511 F.2d 904, 907 (3d Cir. 1975); Arnstein v. Porter , 154 F.2d 464, 468 (2d Cir. 1946).

4 French for “scenes for action.” Scènes à faire , B LACK ’ S L AW D ICTIONARY (11th ed. 2019).No. 19-2716 17

of architectural work within the scènes à faire doctrine. 5 But the arrangements are also dictated by functionality. The kitchen is near the dining room so that food can easily be moved between the two rooms. The bedrooms aren’t nearthe front hall because guests don’t venture into the bedrooms. The functionality of the room arrangements is where the doctrine of merger comes in. Merger arises from § 102(b), which, as we’ve explained, codifies the idea–expression dichotomy and specifies that copyright never extends to an idea, procedure, principle, or concept. Copyright protects only expression; patent law is the proper instrument for protecting functionality. See Eldred v. Ashcroft , 537 U.S. 186, 217 (2003).
Merger doctrine prevents the use of copyright to protectan idea or procedure. If an idea or procedure can be expressed in only a few ways, it is easy to copyright everyform in which the idea can be expressed, indirectly protecting the idea itself. 4 N IMMER ON C OPYRIGHT § 13.03[B][3]; see also Morrissey v. Procter & Gamble Co. , 379 F.2d 675, 678–79 (1st Cir. 1967). To guard against this kind of overprotection, when an idea can be expressed in only limited ways, courts say that the expression “merges” into the idea and cannot receive copyright protection. Lexington Homes , 858 F.3d at 1102. For example, the forms used to implement a particular method of accounting are an expression of the accounting method and cannot be copyrighted. Baker v. Selden , 101 U.S. 99 (1879). The same is true for the rules of a sweepstakes competition: because there are a limited number of ways to

5 Recall as well that under the definition of an architectural work, “individual standard features” are not protected. 17 U.S.C. § 101.18 No. 19-2716

explain the rules, the expression of the rules receives little, if any, copyright protection. Morrissey , 379 F.2d at 678–79.
Merger also applies to the Design Basics home plans. Thefunctional requirements of living spaces dictate that particular rooms be placed close together. And the general concept of the affordable, multipurpose, suburban, single-family home also contributes to the design. This isn’t to say that there is only one way to arrange the rooms in this homedesign genre. But there are only a limited number of possible floor plans, and by creating more than 2,800 of these plans, Design Basics has attempted to occupy the entire field. We wondered in Lexington Homes if “there is any blueprint for a single-family home anywhere in the country that Design Basics could not match to one of its own designs.” 858 F.3d at 1103. If Design Basics held any more than thin copyright protection in its floor plans, it would own nearly the entire field of suburban, single-family home design.
The McNicholas report reinforces our holding in Lexington Homes that the copyright in the Design Basics floor plans is thin. Although McNicholas set out to demonstrate the unique nature of the ten plans at issue here, his report demonstrates just the opposite. As we’ve explained, the report describes each floor plan in generic and often nearly identical language. The report shows that each floor plan uses the same design features to accomplish the same ends.
Accordingly, although Design Basics asks us to revisit
our decision in Lexington Homes , we see no reason to do so. 6

6 Design Basics urges us to instead adopt the First Circuit’s approach in T-Peg, Inc. v. Vermont Timber Works, Inc. , 459 F.3d 97 (1st Cir. 2006), which looked to similarities in the “overall form” of the buildings to assess architectural copyright infringement. Id. at 113–14. Design Basics is wrong to suggest that our approach differs from the First Circuit’s.No. 19-2716 19

To the contrary, we reiterate our conclusion that Design Basics holds only thin copyright in its floor plans. Id. at 1101–02. And in this particular architectural genre in which copyright protection is thin, proving unlawful appropriationtakes more than a substantial similarity between the plaintiff’s work and the defendant’s work. Instead, only a virtually identical plan infringes the plaintiff’s copyrighted plan. Incredible Techs., Inc. v. Virtual Techs., Inc. , 400 F.3d 1007, 1013–14 (7th Cir. 2005).
C. Application
We can make short work of applying these principles to this record. Except for the 2461 Shawnee plan, Design Basics has no direct evidence of actual copying. For the remaining nine plans, it must rely on circumstantial proof of actualcopying, which requires evidence of both access and probative similarity.
We can safely skip the issue of access. The district judge aptly observed that the Signature plans are dissimilar in material respects from the plans they are alleged to infringe. They have different room dimensions, ceiling heights and styles, and exterior dimensions. Some have a different number of rooms, an d the garages are sometimes placed at

T-Peg , like Lexington Homes , applied well-established principles of copyright law to the facts at hand. But the facts in T-Peg were materially
different from this case and from Lexington Homes . The architectural plans at issue there were for a timber-frame home, a design driven as much by aesthetics as by functionality . Id. at 101. The First Circuit thus reasonably refrained from holding that the scènes à faire and merger doctrines meant that the timber-frame home plans received limited protection. There is no reason to think that the First Circuit would analyze plans for suburban, single-family tract homes any differently
than we did in Lexington Homes

.20 No. 19-2716

different angles to the homes. These differences are enough as a matter of law to preclude an inference of actual copying.
For the same reason, even if we assume that actual copying occurred in the case of the 2461 Shawnee floor plan, no reasonable jury could find unlawful appropriation. Signature’s Lot 119 Lake Falls floor plan is not virtually identical to the 2461 Shawnee. Though both designs depict a one-story ranch with a kitchen, breakfast room, great room, dining room, three bedrooms, and two bathrooms in the same general locations, see Appendix, the Signature plan is different from the 2461 Shawnee in some notable ways. It has greater square footage, and the room dimensions are subtly different. The ceilings have different heights, and the two homes have different aspect ratios. The 2461 Shawnee has a two-car garage and its walls are parallel to the home, while the Lot 119 Lake Falls plan features a three-car garage placed at an angle to the rest of the home. Although most of the rooms are located in the same relative positions, some are not: where the 2461 Shawnee plan places a bathroom, the Lot 119 Lake Falls plan has a walk-in closet.
In a field unconstrained by convention and functionality, the similarity of the overall layou ts of the two floor plans would be noticeable. But suburban, single-family housing isa field with many standard elements and limited possibilities for creativity, so the Lot 119 Lake Falls plan must be virtually identical to the 2461 Shawnee to infringe Design Basics’ thin copyright. Under th is standard, Signature’s plan is noninfringing as a matter of law.
Finally, we note for completeness that we find no flaw in the district judge’s conclusion that Signature’s plans are dissimilar enough to preclude liability even under ordinary substantial-similarity analysis. As we explained whenNo. 19-2716 21

discussing probative similarity, each Signature plan features different room dimensions, ceiling styles and heights, and exterior dimensions than the Design Basics plan it is allegedto infringe. The number and placement of rooms is sometimes different, as is the size and (in some cases) the location of the garage. Accordingly, the judge correctly concludedthat the Signature plans are noninfringing under conventional substantial-similarity analysis; the plans are certainly not virtually identical to the Design Basics plans they are alleged to infringe. Summary judgment for Signature was
proper.

A FFIRMED22 No. 19-2716

Appendix
Design Basics’ 2461 Shawnee Plan

Signature Construction’s Lot 119 Lake Falls Plan