AI Visibility Index · Cell report

AI Visibility Index: Commercial & Industrial Building Construction Contractors in Illinois

78 companies tracked · Last measured September 16, 2026

When a buyer asks an AI assistant for a commercial & industrial building construction contractors supplier in Illinois, these are the companies that get named. This is what we found when the cell was last measured.

The headline numbers

73 of 78

companies never appeared in a single buying question

They were asked the same 5 buying questions as everyone else in this cell and were not named once.

Not sure whether you are one of them? Check your domain.

Cell average
0.09of 15

Across all 78 tracked companies.

Top ten average
3.6of 15

The ten most visible companies in the cell.

A company's score is how many of the 15 measured answers named it.

The top ten in Illinois

These are the companies AI assistants named most often when Illinois buyers went looking for a supplier in this category.

Top 10 most AI-visible Commercial & Industrial Building Construction Contractors companies in Illinois, measured September 16, 2026
RankCompanyLocationAI visibility
1Building Systems, Inc.
2 name variants
  • Building Systems, Inc.most common3
  • Building Systems, Inc. (BSI)2
northern, Illinois5 of 15 answers
2Direct Steel and ConstructionIllinois5 of 15 answers
3Cord Construction Company
2 name variants
  • Cord Construction Companymost common3
  • Cord Construction1
Illinois4 of 15 answers
4Leopardo ConstructionIllinois4 of 15 answers
5Pepper Construction Company25 employees
2 name variants
  • Pepper Constructionmost common2
  • Pepper Construction Company1
Barrington, Illinois3 of 15 answers
6ARCO/MurrayIllinois3 of 15 answers
7Bulley & Andrews
2 name variants
  • Bulley & Andrewsmost common2
  • Bulley & Andrews, LLC1
Illinois3 of 15 answers
8DePue Mechanical
2 name variants
  • DePue Mechanicalmost common2
  • DePue Mechanical, Inc.1
Illinois3 of 15 answers
9FCL BuildersIllinois3 of 15 answers
10Greystone Construction
2 name variants
  • Greystone Constructionmost common2
  • Greystone Construction (Illinois market)1
northern, Illinois3 of 15 answers

47 more companies were named at least once. Companies outside the top ten are counted in the averages but not named here.

Also named, based in another state

AI assistants named these companies too, but MacRAE'S lists them in a different state, not Illinois. They belong to that state's ranking, not this one.

CompanyStateMentions
Integrated Building Systems, Inc. (IBSI)Ohio5 of 15
ClaycoMissouri3 of 15
Terrapin Construction GroupDistrict of Columbia3 of 15
Clune ConstructionCalifornia2 of 15
ARCO Design/BuildGeorgia1 of 15
Mortenson (M.A. Mortenson Company)Washington1 of 15

One of these yours?

A complete Blue Book listing is one of the sources assistants read in this category. Confirming your details is free.

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What moved since the last measurement

This is the first measurement of this cell, so there is nothing to compare it with yet. The next measurement will show what moved.

Stability is normal. AI answers in industrial categories change slowly, and a cell can go several measurements with no change in the top ten.

The five questions we asked

Every company in this cell is measured on the same questions, written the way a buyer would type them. That is what makes the ranking a comparison rather than a collection of anecdotes.

  1. 1Best commercial and industrial building construction contractors in Illinois
  2. 2Who supplies turnkey industrial warehouse construction services in Illinois
  3. 3I need a Illinois commercial contractor for a new 100,000 square foot distribution center build, who should I talk to
  4. 4Top commercial and industrial building construction contractors in Illinois for corporate facilities buyers
  5. 5Which Illinois commercial and industrial building contractors can handle design-build projects with complex MEP systems
  6. 6List 20 commercial and industrial building construction contractors in Illinois with their specialties.the roster question

Each question is asked more than once, which is why a company's score is out of 15 answers rather than out of the number of questions.

Where AI drew its answers from

These are the sources the answers in this cell leaned on most, ranked by how many of the named companies each one stands behind.

  • enr.com10 companies
  • gobridgit.com7 companies
  • en.wikipedia.orgDirectory3 companies
  • naiopchicago.org3 companies
  • siba-agc.org3 companies
  • krusinski.com2 companies
  • cordconstruction.com2 companies
  • bldgsys.com2 companies
  • buildingsystemsofillinois.com2 companies
  • depuemechanical.com2 companies
  • greystoneconstruction.com2 companies
  • herronconstruction.com2 companies

69 sources were cited across this cell's answers from 59 domains. A directory page often stands behind several companies at once; a company's own site usually stands behind one.

Illinois in context

Illinois is the only state measured in this category so far, so there is nothing to compare it with yet.

Look up a company

Enter a domain or a company name to see whether it is tracked in this cell, and whether the answers named it. This is a lookup against a measurement already taken, so it is instant.

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The public Index publishes one measurement per cell. A monthly report covers your own company: every question it was named on, every question it was not, and what moved. Your own position is only ever shown to you.

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