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AI Search Ranking Factors for AEC firms.

How ChatGPT, Google AI Overviews and Perplexity decide which engineering, architecture and construction firms to recommend, with the evidence behind each factor.

  • 13 factors rated by strength of evidence
  • What to do for each one
  • A simple 30-day plan to follow
  • Free
  • No signup
  • 8 minute read

The 13 factors

1

Crawl access and indexability

Strong evidence

AI answers can only use pages their crawlers can fetch. Google AI features draw on pages that are indexed and eligible to appear in Search.

What to doAllow Googlebot, Bingbot and the AI search crawlers (OAI-SearchBot, PerplexityBot, Claude-SearchBot) in robots.txt, and check that your firewall or CDN is not challenging them. Keep key pages free of noindex. Blocking Google-Extended only controls Gemini AI use and does not affect Google Search rankings.

2

A clear, consistent firm entity

Strong evidence

AI tools cross-check your firm name, offices, phone number and disciplines across your site and the wider web. Conflicts lower their confidence.

What to doUse the same firm name, address and phone format everywhere: website footer, Google Business Profile, LinkedIn, BBB and industry directories. State the disciplines you offer and the states you work in, in plain words.

3

Deep service and discipline pages

Strong evidence

AI answers quote pages that answer the exact question being asked, such as who designs substations in Texas.

What to doBuild a page for each core service or discipline, for example structural engineering, MEP design, design-build, construction management or permit drawings. Cover scope, process, typical timelines, codes and standards, project types and how to start.

4

Real projects and case studies

Strong evidence

Named projects with a location, size, scope and result are the proof AI tools quote when they recommend a firm.

What to doPublish a page for each notable project: client type, location, square footage or capacity, your role, the challenge, the outcome and photos. Link projects to the matching service pages.

5

Licenses, credentials and named experts

Strong evidence

Owners, developers and procurement teams hire firms they can verify. AI tools look for the same signals.

What to doShow license numbers and the states you are licensed in, insurance and bonding, and credentials such as PE, AIA, NCARB, LEED AP or OSHA. Add bios with real names and photos of principals and key staff.

6

Google Business Profile and reviews

Strong evidence

Google Maps and local AI answers lean on your profile and on reviews that mention the work you did.

What to doChoose the right primary category (for example Engineer, Architect or General contractor), list every service, add office photos and project photos, and ask clients for reviews that mention the project type and city. Reply to every review.

7

Location and market pages

Moderate evidence

Many searches name a city or state. Pages that show real local work match them better than thin copies.

What to doOnly for offices and markets you truly serve, write a page with local projects, licenses held in that state, local codes or permitting notes and a local contact. Never publish copy-paste doorway pages.

8

Question-led content with direct answers

Moderate evidence

AI assistants favour pages that answer a question in the first sentence and then add detail.

What to doAdd FAQs and guides such as how long a commercial permit takes, when a project needs stamped drawings, and what drives design or construction cost. Lead with a direct answer of 40 to 60 words.

9

Mentions on trusted third-party sites

Strong evidence

Assistants that browse the web pull from directories, associations, trade press and partner sites, not only from your own site.

What to doKeep your LinkedIn company page, BBB, Houzz, Clutch and association listings (AIA chapter, ACEC, AGC, ABC) complete and consistent. Earn mentions in trade press, project announcements and partner sites.

10

Structured data

Moderate evidence

Schema gives machines your firm facts in a clean, unambiguous format.

What to doAdd Organization plus ProfessionalService or GeneralContractor schema with address, phone, areaServed, logo, founder and sameAs links. Use FAQPage only for questions that are visible on the page. Do not mark up your own reviews of your own firm.

11

Text visible without JavaScript, fast and mobile friendly

Moderate evidence

Many AI crawlers read raw HTML and do not run scripts.

What to doKeep key content, your phone number and your service list in the HTML rather than in scripts, sliders or images. Compress project photos and keep pages fast on mobile.

12

Fresh, real proof

Moderate evidence

Out-of-date pages and generic stock content lower trust.

What to doShow updated dates, recent projects, real site photos and short project notes. Remove old team members, expired certifications and stale news.

13

llms.txt file

Emerging evidence

No major AI provider has confirmed that it uses llms.txt to decide who to recommend.

What to doPublishing a short, accurate llms.txt is cheap and may help some tools, but treat it as a small bonus after the factors above.

Your 30-day AI visibility plan.

Week 1: Open the doors

  • Run this checker on your homepage and your top three service pages.
  • Fix robots.txt and firewall blocks for AI crawlers.
  • Remove noindex from key pages and submit your sitemap.
  • Make your phone number tap-to-call on every page.

Week 2: Firm profile and proof

  • Complete your Google Business Profile: categories, services, offices and photos.
  • Match your firm name, address and phone on LinkedIn, BBB and industry directories.
  • Ask three recent clients for a review that names the project type and city.
  • Show license numbers, insurance and credentials in the footer.

Week 3: Pages AI can quote

  • Write or upgrade one page for each core service or discipline.
  • Publish two or three real project case studies.
  • Add 6 to 10 real FAQs with direct answers.
  • Add bios for principals and key staff.

Week 4: Structure and measure

  • Add Organization and ProfessionalService schema, and FAQ schema for visible FAQs.
  • Publish a short llms.txt.
  • Test 10 real client questions in ChatGPT, Perplexity and Google and record whether you are mentioned.
  • Re-run this checker and compare your score.

How to use it, step by step.

  1. 1

    Check where you stand

    Run the AI Visibility Checker on your homepage and top service page.

  2. 2

    Fix the strong factors first

    Crawler access, a clear firm entity, service pages, project proof and credentials have the strongest evidence.

  3. 3

    Measure real mentions

    Use the AI Prompt Tester each month to see whether AI tools start naming your firm.

How to read this guide.

Strong evidence

Supported by how AI search products describe their sources and by consistent results across audits.

Moderate evidence

Helps in practice but depends on your market, your competitors and the question being asked.

Emerging

Cheap to do and may help some tools, but not confirmed by any major AI provider.

See your AI visibility score first.

The free checker scores one page out of 100 and ranks the fixes.

Run the AI Visibility Checker

AI Search Ranking Factors questions.

Straight answers, with no inflated promises.

Ask a question
How do I rank in ChatGPT as an engineering firm?
There is no ranking you can buy. Make your pages crawlable, describe your disciplines and service area clearly, publish real project case studies, show licenses and credentials, and keep your firm details consistent on trusted sites.
Is AI search ranking different from Google ranking?
They overlap. Google AI Overviews draw on pages indexed in Google Search. ChatGPT and Perplexity also pull from live web results, so strong SEO helps both.
Do reviews matter for AEC firms in AI search?
Yes. Reviews on Google and trusted sites that mention the project type and city give AI tools quotable proof about your work.
Can anyone guarantee AI placement?
No. Nobody can guarantee placement or citations in AI answers. Results change by question, location and over time.

Want us to do the work for you?

Send us your site. We will review it for search and AI visibility and show you the first fixes worth making.

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